Char/Misc drivers for 6.4-rc1

Here is the "big" set of char/misc and other driver subsystems for 6.4-rc1. It's pretty big, but due to the removal of pcmcia drivers, almost breaks even for number of lines added vs. removed, a nice change. Included in here are: - removal of unused PCMCIA drivers (finally!) - Interconnect driver updates and additions - Lots of IIO driver updates and additions - MHI driver updates - Coresight driver updates - NVMEM driver updates, which required some OF updates - W1 driver updates and a new maintainer to manage the subsystem - FPGA driver updates - New driver subsystem, CDX, for AMD systems - lots of other small driver updates and additions All of these have been in linux-next for a while with no reported issues. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> -----BEGIN PGP SIGNATURE----- iG0EABECAC0WIQT0tgzFv3jCIUoxPcsxR9QN2y37KQUCZEp5Eg8cZ3JlZ0Brcm9h aC5jb20ACgkQMUfUDdst+ynSXgCg0kSw3vUYwpsnhAsQkoPw1QVA23sAn2edRCMa GEkPWjrROueCom7xbLMu =eR+P -----END PGP SIGNATURE----- Merge tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc drivers updates from Greg KH: "Here is the "big" set of char/misc and other driver subsystems for 6.4-rc1. It's pretty big, but due to the removal of pcmcia drivers, almost breaks even for number of lines added vs. removed, a nice change. Included in here are: - removal of unused PCMCIA drivers (finally!) - Interconnect driver updates and additions - Lots of IIO driver updates and additions - MHI driver updates - Coresight driver updates - NVMEM driver updates, which required some OF updates - W1 driver updates and a new maintainer to manage the subsystem - FPGA driver updates - New driver subsystem, CDX, for AMD systems - lots of other small driver updates and additions All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (196 commits) mcb-lpc: Reallocate memory region to avoid memory overlapping mcb-pci: Reallocate memory region to avoid memory overlapping mcb: Return actual parsed size when reading chameleon table kernel/configs: Drop Android config fragments virt: acrn: Replace obsolete memalign() with posix_memalign() spmi: Add a check for remove callback when removing a SPMI driver spmi: fix W=1 kernel-doc warnings spmi: mtk-pmif: Drop of_match_ptr for ID table spmi: pmic-arb: Convert to platform remove callback returning void spmi: mtk-pmif: Convert to platform remove callback returning void spmi: hisi-spmi-controller: Convert to platform remove callback returning void w1: gpio: remove unnecessary ENOMEM messages w1: omap-hdq: remove unnecessary ENOMEM messages w1: omap-hdq: add SPDX tag w1: omap-hdq: allow compile testing w1: matrox: remove unnecessary ENOMEM messages w1: matrox: use inline over __inline__ w1: matrox: switch from asm to linux header w1: ds2482: do not use assignment in if condition w1: ds2482: drop unnecessary header ...
2024-11-11 04:18:39 +08:00 · 2023-04-27 12:07:50 -07:00 · 2023-04-27 12:07:50 -07:00 · cec24b8b6b
commit cec24b8b6b
parent 556eb8b791 2025b2ca80
267 changed files with 11009 additions and 10977 deletions
--- a/5
+++ b/5
@ -3475,6 +3475,11 @@ D: several improvements to system programs
 S: Oldenburg
 S: Germany

+N: Mathieu Poirier
+E: mathieu.poirier@linaro.org
+D: CoreSight kernel subsystem, Maintainer 2014-2022
+D: Perf tool support for CoreSight
+
 N: Robert Schwebel
 E: robert@schwebel.de
 W: https://www.schwebel.de
--- a/Documentation/ABI/testing/sysfs-bus-cdx
+++ b/Documentation/ABI/testing/sysfs-bus-cdx
@ -0,0 +1,56 @@
+What:		/sys/bus/cdx/rescan
+Date:		March 2023
+Contact:	nipun.gupta@amd.com
+Description:
+		Writing y/1/on to this file will cause rescan of the bus
+		and devices on the CDX bus. Any new devices are scanned and
+		added to the list of Linux devices and any devices removed are
+		also deleted from Linux.
+
+		For example::
+
+		  # echo 1 > /sys/bus/cdx/rescan
+
+What:		/sys/bus/cdx/devices/.../vendor
+Date:		March 2023
+Contact:	nipun.gupta@amd.com
+Description:
+		Vendor ID for this CDX device, in hexadecimal. Vendor ID is
+		16 bit identifier which is specific to the device manufacturer.
+		Combination of Vendor ID and Device ID identifies a device.
+
+What:		/sys/bus/cdx/devices/.../device
+Date:		March 2023
+Contact:	nipun.gupta@amd.com
+Description:
+		Device ID for this CDX device, in hexadecimal. Device ID is
+		16 bit identifier to identify a device type within the range
+		of a device manufacturer.
+		Combination of Vendor ID and Device ID identifies a device.
+
+What:		/sys/bus/cdx/devices/.../reset
+Date:		March 2023
+Contact:	nipun.gupta@amd.com
+Description:
+		Writing y/1/on to this file resets the CDX device.
+		On resetting the device, the corresponding driver is notified
+		twice, once before the device is being reset, and again after
+		the reset has been complete.
+
+		For example::
+
+		  # echo 1 > /sys/bus/cdx/.../reset
+
+What:		/sys/bus/cdx/devices/.../remove
+Date:		March 2023
+Contact:	tarak.reddy@amd.com
+Description:
+		Writing y/1/on to this file removes the corresponding
+		device from the CDX bus. If the device is to be reconfigured
+		reconfigured in the Hardware, the device can be removed, so
+		that the device driver does not access the device while it is
+		being reconfigured.
+
+		For example::
+
+		  # echo 1 > /sys/bus/cdx/devices/.../remove
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@ -1807,8 +1807,8 @@ What:		/sys/bus/iio/devices/iio:deviceX/out_resistanceX_raw
 KernelVersion:	4.3
 Contact:	linux-iio@vger.kernel.org
 Description:
-		Raw (unscaled no offset etc.) resistance reading that can be processed
-		into an ohm value.
+		Raw (unscaled no offset etc.) resistance reading.
+		Units after application of scale and offset are ohms.

 What:		/sys/bus/iio/devices/iio:deviceX/heater_enable
 KernelVersion:	4.1.0
@ -1894,8 +1894,9 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_electricalconductivity_raw
 KernelVersion:	4.8
 Contact:	linux-iio@vger.kernel.org
 Description:
-		Raw (unscaled no offset etc.) electric conductivity reading that
-		can be processed to siemens per meter.
+		Raw (unscaled no offset etc.) electric conductivity reading.
+		Units after application of scale and offset are siemens per
+		meter.

 What:		/sys/bus/iio/devices/iio:deviceX/in_countY_raw
 KernelVersion:	4.10
@ -1951,8 +1952,8 @@ What:		/sys/bus/iio/devices/iio:deviceX/in_phaseY_raw
 KernelVersion:	4.18
 Contact:	linux-iio@vger.kernel.org
 Description:
-		Raw (unscaled) phase difference reading from channel Y
-		that can be processed to radians.
+		Raw (unscaled) phase difference reading from channel Y.
+		Units after application of scale and offset are radians.

 What:		/sys/bus/iio/devices/iio:deviceX/in_massconcentration_pm1_input
 What:		/sys/bus/iio/devices/iio:deviceX/in_massconcentrationY_pm1_input
--- a/Documentation/ABI/testing/sysfs-bus-platform-devices-ampere-smpro
+++ b/Documentation/ABI/testing/sysfs-bus-platform-devices-ampere-smpro
@ -234,8 +234,8 @@ Description:
 		For details, see section `5.10 RAS Internal Error Register Definitions,
 		Altra Family Soc BMC Interface Specification`.

-What:		/sys/bus/platform/devices/smpro-errmon.*/event_[vrd_warn_fault|vrd_hot|dimm_hot]
-KernelVersion:	6.1
+What:		/sys/bus/platform/devices/smpro-errmon.*/event_[vrd_warn_fault|vrd_hot|dimm_hot|dimm_2x_refresh]
+KernelVersion:	6.1 (event_[vrd_warn_fault|vrd_hot|dimm_hot]), 6.4 (event_dimm_2x_refresh)
 Contact:	Quan Nguyen <quan@os.amperecomputing.com>
 Description:
 		(RO) Contains the detail information in case of VRD/DIMM warning/hot events
@ -258,8 +258,21 @@ Description:
 		+---------------+---------------------------------------------------------------+---------------------+
 		| DIMM HOT      | /sys/bus/platform/devices/smpro-errmon.*/event_dimm_hot       | DIMM Hot            |
 		+---------------+---------------------------------------------------------------+---------------------+
+		| DIMM 2X       | /sys/bus/platform/devices/smpro-errmon.*/event_dimm_2x_refresh| DIMM 2x refresh rate|
+		| REFRESH RATE  |                                                               | event in high temp  |
+		+---------------+---------------------------------------------------------------+---------------------+

-		For more details, see section `5.7 GPI Status Registers,
+		For more details, see section `5.7 GPI Status Registers and 5.9 Memory Error Register Definitions,
+		Altra Family Soc BMC Interface Specification`.
+
+What:		/sys/bus/platform/devices/smpro-errmon.*/event_dimm[0-15]_syndrome
+KernelVersion:	6.4
+Contact:	Quan Nguyen <quan@os.amperecomputing.com>
+Description:
+		(RO) The sysfs returns the 2-byte DIMM failure syndrome data for slot
+		0-15 if it failed to initialize.
+
+		For more details, see section `5.11 Boot Stage Register Definitions,
 		Altra Family Soc BMC Interface Specification`.

 What:		/sys/bus/platform/devices/smpro-misc.*/boot_progress
--- a/Documentation/ABI/testing/sysfs-driver-zynqmp-fpga
+++ b/Documentation/ABI/testing/sysfs-driver-zynqmp-fpga
@ -0,0 +1,73 @@
+What:		/sys/bus/platform/drivers/zynqmp_fpga_manager/firmware:zynqmp-firmware:pcap/status
+Date:		February 2023
+KernelVersion:	6.4
+Contact:	Nava kishore Manne <nava.kishore.manne@amd.com>
+Description:	(RO) Read fpga status.
+		Read returns a hexadecimal value that tells the current status
+		of the FPGA device. Each bit position in the status value is
+		described Below(see ug570 chapter 9).
+		https://docs.xilinx.com/v/u/en-US/ug570-ultrascale-configuration
+
+		======================  ==============================================
+		BIT(0)			0: No CRC error
+					1: CRC error
+
+		BIT(1)			0: Decryptor security not set
+					1: Decryptor security set
+
+		BIT(2)			0: MMCMs/PLLs are not locked
+					1: MMCMs/PLLs are locked
+
+		BIT(3)			0: DCI not matched
+					1: DCI matched
+
+		BIT(4)			0: Start-up sequence has not finished
+					1: Start-up sequence has finished
+
+		BIT(5)			0: All I/Os are placed in High-Z state
+					1: All I/Os behave as configured
+
+		BIT(6)			0: Flip-flops and block RAM are write disabled
+					1: Flip-flops and block RAM are write enabled
+
+		BIT(7)			0: GHIGH_B_STATUS asserted
+					1: GHIGH_B_STATUS deasserted
+
+		BIT(8) to BIT(10)	Status of the mode pins
+
+		BIT(11)			0: Initialization has not finished
+					1: Initialization finished
+
+		BIT(12)			Value on INIT_B_PIN pin
+
+		BIT(13)			0: Signal not released
+					1: Signal released
+
+		BIT(14)			Value on DONE_PIN pin.
+
+		BIT(15)			0: No IDCODE_ERROR
+					1: IDCODE_ERROR
+
+		BIT(16)			0: No SECURITY_ERROR
+					1: SECURITY_ERROR
+
+		BIT(17)			System Monitor over-temperature if set
+
+		BIT(18) to BIT(20)	Start-up state machine (0 to 7)
+					Phase 0 = 000
+					Phase 1 = 001
+					Phase 2 = 011
+					Phase 3 = 010
+					Phase 4 = 110
+					Phase 5 = 111
+					Phase 6 = 101
+					Phase 7 = 100
+
+		BIT(25) to BIT(26)	Indicates the detected bus width
+					00 = x1
+					01 = x8
+					10 = x16
+					11 = x32
+		======================  ==============================================
+
+		The other bits are reserved.
--- a/Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
+++ b/Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/xlnx,versal-net-cdx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: AMD CDX bus controller
+
+description: |
+  CDX bus controller for AMD devices is implemented to dynamically
+  detect CDX bus and devices using the firmware.
+  The CDX bus manages multiple FPGA based hardware devices, which
+  can support network, crypto or any other specialized type of
+  devices. These FPGA based devices can be added/modified dynamically
+  on run-time.
+
+  All devices on the CDX bus will have a unique streamid (for IOMMU)
+  and a unique device ID (for MSI) corresponding to a requestor ID
+  (one to one associated with the device). The streamid and deviceid
+  are used to configure SMMU and GIC-ITS respectively.
+
+  iommu-map property is used to define the set of stream ids
+  corresponding to each device and the associated IOMMU.
+
+  The MSI writes are accompanied by sideband data (Device ID).
+  The msi-map property is used to associate the devices with the
+  device ID as well as the associated ITS controller.
+
+  rproc property (xlnx,rproc) is used to identify the remote processor
+  with which APU (Application Processor Unit) interacts to find out
+  the bus and device configuration.
+
+maintainers:
+  - Nipun Gupta <nipun.gupta@amd.com>
+  - Nikhil Agarwal <nikhil.agarwal@amd.com>
+
+properties:
+  compatible:
+    const: xlnx,versal-net-cdx
+
+  iommu-map: true
+
+  msi-map: true
+
+  xlnx,rproc:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      phandle to the remoteproc_r5 rproc node using which APU interacts
+      with remote processor.
+
+  ranges: true
+
+  "#address-cells":
+    enum: [1, 2]
+
+  "#size-cells":
+    enum: [1, 2]
+
+required:
+  - compatible
+  - iommu-map
+  - msi-map
+  - xlnx,rproc
+  - ranges
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    cdx {
+        compatible = "xlnx,versal-net-cdx";
+        #address-cells = <1>;
+        #size-cells = <1>;
+        /* define map for RIDs 250-259 */
+        iommu-map = <250 &smmu 250 10>;
+        /* define msi map for RIDs 250-259 */
+        msi-map = <250 &its 250 10>;
+        xlnx,rproc = <&remoteproc_r5>;
+        ranges;
+    };
--- a/Documentation/devicetree/bindings/iio/adc/renesas,rcar-gyroadc.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/renesas,rcar-gyroadc.yaml
@ -34,9 +34,11 @@ properties:
  clock-names:
    const: fck

-  power-domains: true
+  power-domains:
+    maxItems: 1

-  resets: true
+  resets:
+    maxItems: 1

  "#address-cells":
    const: 1
@ -51,6 +53,8 @@ required:
  - reg
  - clocks
  - clock-names
+  - power-domains
+  - resets
  - "#address-cells"
  - "#size-cells"

@ -108,36 +112,30 @@ patternProperties:

 examples:
  - |
-    #include <dt-bindings/clock/r8a7791-clock.h>
+    #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
    #include <dt-bindings/power/r8a7791-sysc.h>
-    soc {
-        #address-cells = <2>;
-        #size-cells = <2>;

-        adc@e6e54000 {
-            compatible = "renesas,r8a7791-gyroadc", "renesas,rcar-gyroadc";
-            reg = <0 0xe6e54000 0 64>;
-            clocks = <&mstp9_clks R8A7791_CLK_GYROADC>;
-            clock-names = "fck";
-            power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+    adc@e6e54000 {
+        compatible = "renesas,r8a7791-gyroadc", "renesas,rcar-gyroadc";
+        reg = <0xe6e54000 64>;
+        clocks = <&cpg CPG_MOD 901>;
+        clock-names = "fck";
+        power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
+        resets = <&cpg 901>;

-            pinctrl-0 = <&adc_pins>;
-            pinctrl-names = "default";
+        #address-cells = <1>;
+        #size-cells = <0>;

-            #address-cells = <1>;
-            #size-cells = <0>;
+        adc@0 {
+            reg = <0>;
+            compatible = "maxim,max1162";
+            vref-supply = <&vref_max1162>;
+        };

-            adc@0 {
-                reg = <0>;
-                compatible = "maxim,max1162";
-                vref-supply = <&vref_max1162>;
-            };
-
-            adc@1 {
-                reg = <1>;
-                compatible = "maxim,max1162";
-                vref-supply = <&vref_max1162>;
-            };
+        adc@1 {
+            reg = <1>;
+            compatible = "maxim,max1162";
+            vref-supply = <&vref_max1162>;
        };
    };
 ...
--- a/Documentation/devicetree/bindings/iio/adc/ti,ads1100.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/ti,ads1100.yaml
@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/ti,ads1100.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI ADS1100/ADS1000 single channel I2C analog to digital converter
+
+maintainers:
+  - Mike Looijmans <mike.looijmans@topic.nl>
+
+description: |
+  Datasheet at: https://www.ti.com/lit/gpn/ads1100
+
+properties:
+  compatible:
+    enum:
+      - ti,ads1100
+      - ti,ads1000
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+  "#io-channel-cells":
+    const: 0
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        adc@49 {
+            compatible = "ti,ads1100";
+            reg = <0x49>;
+        };
+    };
+...
--- a/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
+++ b/Documentation/devicetree/bindings/iio/addac/adi,ad74413r.yaml
@ -101,6 +101,15 @@ patternProperties:
          When not configured as a comparator, the GPO will be treated as an
          output-only GPIO.

+      drive-strength-microamp:
+        description: |
+          For channels configured as digital input, this configures the sink
+          current.
+        minimum: 0
+        maximum: 1800
+        default: 0
+        multipleOf: 120
+
    required:
      - reg

--- a/Documentation/devicetree/bindings/iio/imu/st,lsm6dsx.yaml
+++ b/Documentation/devicetree/bindings/iio/imu/st,lsm6dsx.yaml
@ -46,6 +46,9 @@ properties:
      - items:
          - const: st,ism330is
          - const: st,lsm6dso16is
+      - items:
+          - const: st,asm330lhb
+          - const: st,asm330lhh

  reg:
    maxItems: 1
--- a/Documentation/devicetree/bindings/iio/light/rohm,bu27034.yaml
+++ b/Documentation/devicetree/bindings/iio/light/rohm,bu27034.yaml
@ -0,0 +1,46 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/light/rohm,bu27034.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BU27034 ambient light sensor
+
+maintainers:
+  - Matti Vaittinen <mazziesaccount@gmail.com>
+
+description: |
+  ROHM BU27034 is an ambient light sesnor with 3 channels and 3 photo diodes
+  capable of detecting a very wide range of illuminance. Typical application
+  is adjusting LCD and backlight power of TVs and mobile phones.
+  https://fscdn.rohm.com/en/products/databook/datasheet/ic/sensor/light/bu27034nuc-e.pdf
+
+properties:
+  compatible:
+    const: rohm,bu27034
+
+  reg:
+    maxItems: 1
+
+  vdd-supply: true
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      light-sensor@38 {
+        compatible = "rohm,bu27034";
+        reg = <0x38>;
+        vdd-supply = <&vdd>;
+      };
+    };
+
+...
--- a/Documentation/devicetree/bindings/iio/pressure/bmp085.yaml
+++ b/Documentation/devicetree/bindings/iio/pressure/bmp085.yaml
@ -17,6 +17,7 @@ description: |
    https://www.bosch-sensortec.com/bst/products/all_products/bmp280
    https://www.bosch-sensortec.com/bst/products/all_products/bme280
    https://www.bosch-sensortec.com/bst/products/all_products/bmp380
+    https://www.bosch-sensortec.com/bst/products/all_products/bmp580

 properties:
  compatible:
@ -26,6 +27,7 @@ properties:
      - bosch,bmp280
      - bosch,bme280
      - bosch,bmp380
+      - bosch,bmp580

  reg:
    maxItems: 1
--- a/Documentation/devicetree/bindings/iio/st,st-sensors.yaml
+++ b/Documentation/devicetree/bindings/iio/st,st-sensors.yaml
@ -11,9 +11,6 @@ description: The STMicroelectronics sensor devices are pretty straight-forward
  what type of sensor it is.
  Note that whilst this covers many STMicro MEMs sensors, some more complex
  IMUs need their own bindings.
-  The STMicroelectronics sensor devices are pretty straight-forward I2C or
-  SPI devices, all sharing the same device tree descriptions no matter what
-  type of sensor it is.

 maintainers:
  - Denis Ciocca <denis.ciocca@st.com>
@ -48,6 +45,9 @@ properties:
          - st,lsm330d-accel
          - st,lsm330dl-accel
          - st,lsm330dlc-accel
+      - items:
+          - const: st,iis328dq
+          - const: st,h3lis331dl-accel
      - description: Silan Accelerometers
        enum:
          - silan,sc7a20
--- a/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
+++ b/Documentation/devicetree/bindings/iio/temperature/adi,ltc2983.yaml
@ -18,6 +18,28 @@ description: |
  https://www.analog.com/media/en/technical-documentation/data-sheets/29861fa.pdf
  https://www.analog.com/media/en/technical-documentation/data-sheets/ltm2985.pdf

+$defs:
+  sensor-node:
+    type: object
+    description: Sensor node common constraints
+
+    properties:
+      reg:
+        description:
+          Channel number. Connects the sensor to the channel with this number
+          of the device.
+        minimum: 1
+        maximum: 20
+
+      adi,sensor-type:
+        description: Type of sensor connected to the device.
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+    required:
+      - reg
+      - adi,sensor-type
+
+
 properties:
  compatible:
    oneOf:
@ -64,28 +86,10 @@ properties:
    const: 0

 patternProperties:
-  "@([0-9a-f]+)$":
-    type: object
-    description: Sensor.
-
-    properties:
-      reg:
-        description:
-          Channel number. Connects the sensor to the channel with this number
-          of the device.
-        minimum: 1
-        maximum: 20
-
-      adi,sensor-type:
-        description: Type of sensor connected to the device.
-        $ref: /schemas/types.yaml#/definitions/uint32
-
-    required:
-      - reg
-      - adi,sensor-type
-
  "^thermocouple@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
+
    description: Thermocouple sensor.

    properties:
@ -123,7 +127,7 @@ patternProperties:
        description:
          Used for digitizing custom thermocouples.
          See Page 59 of the datasheet.
-        $ref: /schemas/types.yaml#/definitions/uint64-matrix
+        $ref: /schemas/types.yaml#/definitions/int64-matrix
        minItems: 3
        maxItems: 64
        items:
@ -141,7 +145,9 @@ patternProperties:
            - adi,custom-thermocouple

  "^diode@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
+
    description: Diode sensor.

    properties:
@ -184,7 +190,8 @@ patternProperties:
        default: 0

  "^rtd@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
    description: RTD sensor.

    properties:
@ -282,7 +289,8 @@ patternProperties:
            - adi,custom-rtd

  "^thermistor@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
    description: Thermistor sensor.

    properties:
@ -383,7 +391,8 @@ patternProperties:
            - adi,custom-thermistor

  "^adc@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
    description: Direct ADC sensor.

    properties:
@ -397,7 +406,8 @@ patternProperties:
        type: boolean

  "^temp@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
    description: Active analog temperature sensor.

    properties:
@ -426,7 +436,8 @@ patternProperties:
      - adi,custom-temp

  "^rsense@":
-    type: object
+    $ref: '#/$defs/sensor-node'
+    unevaluatedProperties: false
    description: Sense resistor sensor.

    properties:
--- a/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
+++ b/Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml
@ -7,9 +7,10 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: TI TMP117 - Digital temperature sensor with integrated NV memory

 description: |
-    TI TMP117 - Digital temperature sensor with integrated NV memory that supports
-    I2C interface.
-      https://www.ti.com/lit/gpn/tmp1
+    TI TMP116/117 - Digital temperature sensor with integrated NV memory that
+    supports I2C interface.
+      https://www.ti.com/lit/gpn/tmp116
+      https://www.ti.com/lit/gpn/tmp117

 maintainers:
  - Puranjay Mohan <puranjay12@gmail.com>
@ -17,6 +18,7 @@ maintainers:
 properties:
  compatible:
    enum:
+      - ti,tmp116
      - ti,tmp117

  reg:
--- a/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml
+++ b/Documentation/devicetree/bindings/interconnect/qcom,msm8998-bwmon.yaml
@ -22,14 +22,14 @@ description: |
 properties:
  compatible:
    oneOf:
+      - const: qcom,msm8998-bwmon       # BWMON v4
      - items:
          - enum:
              - qcom,sc7280-cpu-bwmon
              - qcom,sc8280xp-cpu-bwmon
-              - qcom,sdm845-bwmon
+              - qcom,sdm845-cpu-bwmon
              - qcom,sm8550-cpu-bwmon
-          - const: qcom,msm8998-bwmon
-      - const: qcom,msm8998-bwmon       # BWMON v4
+          - const: qcom,sdm845-bwmon    # BWMON v4, unified register space
      - items:
          - enum:
              - qcom,sc8280xp-llcc-bwmon
@ -49,9 +49,13 @@ properties:
    type: object

  reg:
-    # BWMON v4 (currently described) and BWMON v5 use one register address
-    # space.  BWMON v2 uses two register spaces - not yet described.
-    maxItems: 1
+    # BWMON v5 uses one register address space, v1-v4 use one or two.
+    minItems: 1
+    maxItems: 2
+
+  reg-names:
+    minItems: 1
+    maxItems: 2

 required:
  - compatible
@ -63,13 +67,36 @@ required:

 additionalProperties: false

+allOf:
+  - if:
+      properties:
+        compatible:
+          const: qcom,msm8998-bwmon
+    then:
+      properties:
+        reg:
+          minItems: 2
+
+        reg-names:
+          items:
+            - const: monitor
+            - const: global
+
+    else:
+      properties:
+        reg:
+          maxItems: 1
+
+        reg-names:
+          maxItems: 1
+
 examples:
  - |
    #include <dt-bindings/interconnect/qcom,sdm845.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>

    pmu@1436400 {
-        compatible = "qcom,sdm845-bwmon", "qcom,msm8998-bwmon";
+        compatible = "qcom,sdm845-cpu-bwmon", "qcom,sdm845-bwmon";
        reg = <0x01436400 0x600>;
        interrupts = <GIC_SPI 581 IRQ_TYPE_LEVEL_HIGH>;
        interconnects = <&gladiator_noc MASTER_APPSS_PROC 3 &mem_noc SLAVE_LLCC 3>;
--- a/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml
+++ b/Documentation/devicetree/bindings/interconnect/qcom,osm-l3.yaml
@ -29,6 +29,7 @@ properties:
          - enum:
              - qcom,sc7280-epss-l3
              - qcom,sc8280xp-epss-l3
+              - qcom,sm6375-cpucp-l3
              - qcom,sm8250-epss-l3
              - qcom,sm8350-epss-l3
          - const: qcom,epss-l3
--- a/Documentation/devicetree/bindings/nvmem/allwinner,sun4i-a10-sid.yaml
+++ b/Documentation/devicetree/bindings/nvmem/allwinner,sun4i-a10-sid.yaml
@ -11,7 +11,7 @@ maintainers:
  - Maxime Ripard <mripard@kernel.org>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/amlogic,meson-gxbb-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/amlogic,meson-gxbb-efuse.yaml
@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/amlogic,meson-gxbb-efuse.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Meson GX eFuse
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: amlogic,meson-gxbb-efuse
+      - items:
+          - const: amlogic,meson-gx-efuse
+          - const: amlogic,meson-gxbb-efuse
+
+  clocks:
+    maxItems: 1
+
+  secure-monitor:
+    description: phandle to the secure-monitor node
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - clocks
+  - secure-monitor
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    efuse: efuse {
+        compatible = "amlogic,meson-gxbb-efuse";
+        clocks = <&clk_efuse>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        secure-monitor = <&sm>;
+
+        sn: sn@14 {
+            reg = <0x14 0x10>;
+        };
+
+        eth_mac: mac@34 {
+            reg = <0x34 0x10>;
+        };
+
+        bid: bid@46 {
+            reg = <0x46 0x30>;
+        };
+    };
--- a/Documentation/devicetree/bindings/nvmem/amlogic,meson6-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/amlogic,meson6-efuse.yaml
@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/amlogic,meson6-efuse.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Amlogic Meson6 eFuse
+
+maintainers:
+  - Neil Armstrong <neil.armstrong@linaro.org>
+  - Martin Blumenstingl <martin.blumenstingl@googlemail.com>
+
+allOf:
+  - $ref: nvmem.yaml#
+
+properties:
+  compatible:
+    enum:
+      - amlogic,meson6-efuse
+      - amlogic,meson8-efuse
+      - amlogic,meson8b-efuse
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: core
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    efuse: efuse@0 {
+        compatible = "amlogic,meson6-efuse";
+        reg = <0x0 0x2000>;
+        clocks = <&clk_efuse>;
+        clock-names = "core";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        ethernet_mac_address: mac@1b4 {
+            reg = <0x1b4 0x6>;
+        };
+
+        temperature_calib: calib@1f4 {
+             reg = <0x1f4 0x4>;
+        };
+    };
--- a/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt
+++ b/Documentation/devicetree/bindings/nvmem/amlogic-efuse.txt
@ -1,48 +0,0 @@
-= Amlogic Meson GX eFuse device tree bindings =
-
-Required properties:
- compatible: should be "amlogic,meson-gxbb-efuse"
- clocks: phandle to the efuse peripheral clock provided by the
-	  clock controller.
- secure-monitor: phandle to the secure-monitor node
-
-= Data cells =
-Are child nodes of eFuse, bindings of which as described in
-bindings/nvmem/nvmem.txt
-
-Example:
-
-	efuse: efuse {
-		compatible = "amlogic,meson-gxbb-efuse";
-		clocks = <&clkc CLKID_EFUSE>;
-		#address-cells = <1>;
-		#size-cells = <1>;
-		secure-monitor = <&sm>;
-
-		sn: sn@14 {
-			reg = <0x14 0x10>;
-		};
-
-		eth_mac: eth_mac@34 {
-			reg = <0x34 0x10>;
-		};
-
-		bid: bid@46 {
-			reg = <0x46 0x30>;
-		};
-	};
-
-	sm: secure-monitor {
-		compatible = "amlogic,meson-gxbb-sm";
-	};
-
-= Data consumers =
-Are device nodes which consume nvmem data cells.
-
-For example:
-
-	eth_mac {
-		...
-		nvmem-cells = <&eth_mac>;
-		nvmem-cell-names = "eth_mac";
-	};
--- a/Documentation/devicetree/bindings/nvmem/amlogic-meson-mx-efuse.txt
+++ b/Documentation/devicetree/bindings/nvmem/amlogic-meson-mx-efuse.txt
@ -1,22 +0,0 @@
-Amlogic Meson6/Meson8/Meson8b efuse
-
-Required Properties:
- compatible: depending on the SoC this should be one of:
-	- "amlogic,meson6-efuse"
-	- "amlogic,meson8-efuse"
-	- "amlogic,meson8b-efuse"
- reg: base address and size of the efuse registers
- clocks: a reference to the efuse core gate clock
- clock-names: must be "core"
-
-All properties and sub-nodes as well as the consumer bindings
-defined in nvmem.txt in this directory are also supported.
-
-
-Example:
-	efuse: nvmem@0 {
-		compatible = "amlogic,meson8-efuse";
-		reg = <0x0 0x2000>;
-		clocks = <&clkc CLKID_EFUSE>;
-		clock-names = "core";
-	};
--- a/Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
+++ b/Documentation/devicetree/bindings/nvmem/apple,efuses.yaml
@ -15,7 +15,7 @@ maintainers:
  - Sven Peter <sven@svenpeter.dev>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
+++ b/Documentation/devicetree/bindings/nvmem/brcm,nvram.yaml
@ -20,7 +20,7 @@ maintainers:
  - Rafał Miłecki <rafal@milecki.pl>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/fsl,layerscape-sfp.yaml
@ -14,7 +14,7 @@ description: |
  unique identifier per part.

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/imx-iim.yaml
+++ b/Documentation/devicetree/bindings/nvmem/imx-iim.yaml
@ -14,7 +14,7 @@ description: |
  i.MX25, i.MX27, i.MX31, i.MX35, i.MX51 and i.MX53 SoCs.

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/imx-ocotp.yaml
@ -15,7 +15,7 @@ description: |
  i.MX7D/S, i.MX7ULP, i.MX8MQ, i.MX8MM, i.MX8MN and i.MX8MP SoCs.

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/ingenic,jz4780-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/ingenic,jz4780-efuse.yaml
@ -10,7 +10,7 @@ maintainers:
  - PrasannaKumar Muralidharan <prasannatsmkumar@gmail.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
+++ b/Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
@ -61,7 +61,7 @@ properties:
    type: object
    additionalProperties: false

-  platforn-name:
+  platform-name:
    type: object
    additionalProperties: false

--- a/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/mediatek,efuse.yaml
@ -15,7 +15,7 @@ maintainers:
  - Lala Lin <lala.lin@mediatek.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  $nodename:
--- a/Documentation/devicetree/bindings/nvmem/microchip,sama7g5-otpc.yaml
+++ b/Documentation/devicetree/bindings/nvmem/microchip,sama7g5-otpc.yaml
@ -15,7 +15,7 @@ description: |
  settings, chip identifiers) or user specific data could be stored.

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/mxs-ocotp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/mxs-ocotp.yaml
@ -10,7 +10,7 @@ maintainers:
  - Anson Huang <Anson.Huang@nxp.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/nintendo-otp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/nintendo-otp.yaml
@ -17,7 +17,7 @@ maintainers:
  - Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml
+++ b/Documentation/devicetree/bindings/nvmem/qcom,qfprom.yaml
@ -10,7 +10,7 @@ maintainers:
  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
@ -32,6 +32,8 @@ properties:
          - qcom,sdm670-qfprom
          - qcom,sdm845-qfprom
          - qcom,sm6115-qfprom
+          - qcom,sm6350-qfprom
+          - qcom,sm6375-qfprom
          - qcom,sm8150-qfprom
          - qcom,sm8250-qfprom
      - const: qcom,qfprom
--- a/Documentation/devicetree/bindings/nvmem/qcom,spmi-sdam.yaml
+++ b/Documentation/devicetree/bindings/nvmem/qcom,spmi-sdam.yaml
@ -15,7 +15,7 @@ description: |
  to/from the PBUS.

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
@ -42,17 +42,22 @@ unevaluatedProperties: false

 examples:
  - |
-      sdam_1: nvram@b000 {
-          #address-cells = <1>;
-          #size-cells = <1>;
-          compatible = "qcom,spmi-sdam";
-          reg = <0xb000 0x100>;
-          ranges = <0 0xb000 0x100>;
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;

-          /* Data cells */
-          restart_reason: restart@50 {
-              reg = <0x50 0x1>;
-              bits = <6 2>;
-          };
-      };
+        sdam_1: nvram@b000 {
+            compatible = "qcom,spmi-sdam";
+            reg = <0xb000>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+            ranges = <0 0xb000 0x100>;
+
+            /* Data cells */
+            restart_reason: restart@50 {
+                reg = <0x50 0x1>;
+                bits = <6 2>;
+            };
+        };
+    };
 ...
--- a/Documentation/devicetree/bindings/nvmem/rmem.yaml
+++ b/Documentation/devicetree/bindings/nvmem/rmem.yaml
@ -10,7 +10,7 @@ maintainers:
  - Nicolas Saenz Julienne <nsaenzjulienne@suse.de>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/rockchip-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/rockchip-efuse.yaml
@ -10,7 +10,7 @@ maintainers:
  - Heiko Stuebner <heiko@sntech.de>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/socionext,uniphier-efuse.yaml
+++ b/Documentation/devicetree/bindings/nvmem/socionext,uniphier-efuse.yaml
@ -11,7 +11,7 @@ maintainers:
  - Kunihiko Hayashi <hayashi.kunihiko@socionext.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  "#address-cells": true
--- a/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
+++ b/Documentation/devicetree/bindings/nvmem/st,stm32-romem.yaml
@ -16,7 +16,7 @@ maintainers:
  - Fabrice Gasnier <fabrice.gasnier@foss.st.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/sunplus,sp7021-ocotp.yaml
+++ b/Documentation/devicetree/bindings/nvmem/sunplus,sp7021-ocotp.yaml
@ -11,7 +11,7 @@ maintainers:
  - Vincent Shih <vincent.sunplus@gmail.com>

 allOf:
-  - $ref: "nvmem.yaml#"
+  - $ref: nvmem.yaml#

 properties:
  compatible:
--- a/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
+++ b/Documentation/devicetree/bindings/nvmem/u-boot,env.yaml
@ -50,7 +50,11 @@ properties:

  ethaddr:
    type: object
-    description: Ethernet interface's MAC address
+    description: Ethernet interfaces base MAC address.
+    properties:
+      "#nvmem-cell-cells":
+        description: The first argument is a MAC address offset.
+        const: 1

 additionalProperties: false

@ -72,6 +76,7 @@ examples:
            reg = <0x40000 0x10000>;

            mac: ethaddr {
+                #nvmem-cell-cells = <1>;
            };
        };
    };
--- a/Documentation/devicetree/bindings/w1/maxim,ds2482.yaml
+++ b/Documentation/devicetree/bindings/w1/maxim,ds2482.yaml
@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/w1/maxim,ds2482.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim One wire bus master controller
+
+maintainers:
+  - Stefan Wahren <stefan.wahren@chargebyte.com>
+
+description: |
+  I2C to 1-wire bridges
+
+  https://www.analog.com/media/en/technical-documentation/data-sheets/ds2482-100.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/DS2482-800.pdf
+  https://www.analog.com/media/en/technical-documentation/data-sheets/DS2484.pdf
+
+properties:
+  compatible:
+    enum:
+      - maxim,ds2482
+      - maxim,ds2484
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties:
+  type: object
+
+examples:
+  - |
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      onewire@18 {
+        compatible = "maxim,ds2484";
+        reg = <0x18>;
+      };
+    };
--- a/Documentation/driver-api/nvmem.rst
+++ b/Documentation/driver-api/nvmem.rst
@ -185,3 +185,18 @@ ex::
 =====================

 See Documentation/devicetree/bindings/nvmem/nvmem.txt
+
+8. NVMEM layouts
+================
+
+NVMEM layouts are yet another mechanism to create cells. With the device
+tree binding it is possible to specify simple cells by using an offset
+and a length. Sometimes, the cells doesn't have a static offset, but
+the content is still well defined, e.g. tag-length-values. In this case,
+the NVMEM device content has to be first parsed and the cells need to
+be added accordingly. Layouts let you read the content of the NVMEM device
+and let you add cells dynamically.
+
+Another use case for layouts is the post processing of cells. With layouts,
+it is possible to associate a custom post processing hook to a cell. It
+even possible to add this hook to cells not created by the layout itself.
--- a/Documentation/process/magic-number.rst
+++ b/Documentation/process/magic-number.rst
@ -72,7 +72,6 @@ PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
--- a/Documentation/translations/it_IT/process/magic-number.rst
+++ b/Documentation/translations/it_IT/process/magic-number.rst
@ -78,7 +78,6 @@ PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
--- a/Documentation/translations/sp_SP/process/magic-number.rst
+++ b/Documentation/translations/sp_SP/process/magic-number.rst
@ -77,7 +77,6 @@ PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
--- a/Documentation/translations/zh_CN/process/magic-number.rst
+++ b/Documentation/translations/zh_CN/process/magic-number.rst
@ -61,7 +61,6 @@ PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
--- a/Documentation/translations/zh_TW/process/magic-number.rst
+++ b/Documentation/translations/zh_TW/process/magic-number.rst
@ -64,7 +64,6 @@ PG_MAGIC              'P'              pg_{read,write}_hdr      ``include/linux/
 APM_BIOS_MAGIC        0x4101           apm_user                 ``arch/x86/kernel/apm_32.c``
 FASYNC_MAGIC          0x4601           fasync_struct            ``include/linux/fs.h``
 SLIP_MAGIC            0x5302           slip                     ``drivers/net/slip.h``
-MGSLPC_MAGIC          0x5402           mgslpc_info              ``drivers/char/pcmcia/synclink_cs.c``
 BAYCOM_MAGIC          0x19730510       baycom_state             ``drivers/net/baycom_epp.c``
 HDLCDRV_MAGIC         0x5ac6e778       hdlcdrv_state            ``include/linux/hdlcdrv.h``
 KV_MAGIC              0x5f4b565f       kernel_vars_s            ``arch/mips/include/asm/sn/klkernvars.h``
--- a/Documentation/userspace-api/ioctl/ioctl-number.rst
+++ b/Documentation/userspace-api/ioctl/ioctl-number.rst
@ -222,7 +222,6 @@ Code  Seq#    Include File                                           Comments
 'b'   00-FF                                                          conflict! bit3 vme host bridge
                                                                     <mailto:natalia@nikhefk.nikhef.nl>
 'b'   00-0F  linux/dma-buf.h                                         conflict!
-'c'   all    linux/cm4000_cs.h                                       conflict!
 'c'   00-7F  linux/comstats.h                                        conflict!
 'c'   00-7F  linux/coda.h                                            conflict!
 'c'   00-1F  linux/chio.h                                            conflict!
--- a/59
+++ b/59
@ -964,6 +964,14 @@ Q:	https://patchwork.kernel.org/project/linux-rdma/list/
 F:	drivers/infiniband/hw/efa/
 F:	include/uapi/rdma/efa-abi.h

+AMD CDX BUS DRIVER
+M:	Nipun Gupta <nipun.gupta@amd.com>
+M:	Nikhil Agarwal <nikhil.agarwal@amd.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/bus/xlnx,versal-net-cdx.yaml
+F:	drivers/cdx/*
+F:	include/linux/cdx/*
+
 AMD CRYPTOGRAPHIC COPROCESSOR (CCP) DRIVER
 M:	Tom Lendacky <thomas.lendacky@amd.com>
 M:	John Allen <john.allen@amd.com>
@ -1431,11 +1439,6 @@ S:	Supported
 F:	drivers/clk/analogbits/*
 F:	include/linux/clk/analogbits*

-ANDROID CONFIG FRAGMENTS
-M:	Rob Herring <robh@kernel.org>
-S:	Supported
-F:	kernel/configs/android*
-
 ANDROID DRIVERS
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 M:	Arve Hjønnevåg <arve@android.com>
@ -2095,7 +2098,6 @@ F:	arch/arm/boot/dts/cx92755*
 N:	digicolor

 ARM/CORESIGHT FRAMEWORK AND DRIVERS
-M:	Mathieu Poirier <mathieu.poirier@linaro.org>
 M:	Suzuki K Poulose <suzuki.poulose@arm.com>
 R:	Mike Leach <mike.leach@linaro.org>
 R:	Leo Yan <leo.yan@linaro.org>
@ -10005,6 +10007,13 @@ F:	Documentation/ABI/testing/sysfs-bus-iio-adc-envelope-detector
 F:	Documentation/devicetree/bindings/iio/adc/envelope-detector.yaml
 F:	drivers/iio/adc/envelope-detector.c

+IIO LIGHT SENSOR GAIN-TIME-SCALE HELPERS
+M:	Matti Vaittinen <mazziesaccount@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Maintained
+F:	drivers/iio/light/gain-time-scale-helper.c
+F:	drivers/iio/light/gain-time-scale-helper.h
+
 IIO MULTIPLEXER
 M:	Peter Rosin <peda@axentia.se>
 L:	linux-iio@vger.kernel.org
@ -10528,6 +10537,7 @@ F:	drivers/watchdog/mei_wdt.c
 F:	include/linux/mei_aux.h
 F:	include/linux/mei_cl_bus.h
 F:	include/uapi/linux/mei.h
+F:	include/uapi/linux/mei_uuid.h
 F:	include/uapi/linux/uuid.h
 F:	samples/mei/*

@ -15411,18 +15421,6 @@ S:	Maintained
 F:	Documentation/filesystems/omfs.rst
 F:	fs/omfs/

-OMNIKEY CARDMAN 4000 DRIVER
-M:	Harald Welte <laforge@gnumonks.org>
-S:	Maintained
-F:	drivers/char/pcmcia/cm4000_cs.c
-F:	include/linux/cm4000_cs.h
-F:	include/uapi/linux/cm4000_cs.h
-
-OMNIKEY CARDMAN 4040 DRIVER
-M:	Harald Welte <laforge@gnumonks.org>
-S:	Maintained
-F:	drivers/char/pcmcia/cm4040_cs.*
-
 OMNIVISION OG01A1B SENSOR DRIVER
 M:	Shawn Tu <shawnx.tu@intel.com>
 L:	linux-media@vger.kernel.org
@ -15640,6 +15638,12 @@ L:	linux-hwmon@vger.kernel.org
 S:	Maintained
 F:	drivers/hwmon/oxp-sensors.c

+ONIE TLV NVMEM LAYOUT DRIVER
+M:	Miquel Raynal <miquel.raynal@bootlin.com>
+S:	Maintained
+F:	Documentation/devicetree/bindings/nvmem/layouts/onie,tlv-layout.yaml
+F:	drivers/nvmem/layouts/onie-tlv.c
+
 ONION OMEGA2+ BOARD
 M:	Harvey Hunt <harveyhuntnexus@gmail.com>
 L:	linux-mips@vger.kernel.org
@ -18203,6 +18207,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/iio/light/bh1750.yaml
 F:	drivers/iio/light/bh1750.c

+ROHM BU27034 AMBIENT LIGHT SENSOR DRIVER
+M:	Matti Vaittinen <mazziesaccount@gmail.com>
+L:	linux-iio@vger.kernel.org
+S:	Supported
+F:	drivers/iio/light/rohm-bu27034.c
+
 ROHM MULTIFUNCTION BD9571MWV-M PMIC DEVICE DRIVERS
 M:	Marek Vasut <marek.vasut+renesas@gmail.com>
 L:	linux-kernel@vger.kernel.org
@ -18727,11 +18737,6 @@ F:	include/linux/wait.h
 F:	include/uapi/linux/sched.h
 F:	kernel/sched/

-SCR24X CHIP CARD INTERFACE DRIVER
-M:	Lubomir Rintel <lkundrak@v3.sk>
-S:	Supported
-F:	drivers/char/pcmcia/scr24x_cs.c
-
 SCSI RDMA PROTOCOL (SRP) INITIATOR
 M:	Bart Van Assche <bvanassche@acm.org>
 L:	linux-rdma@vger.kernel.org
@ -19310,6 +19315,12 @@ F:	drivers/irqchip/irq-sl28cpld.c
 F:	drivers/pwm/pwm-sl28cpld.c
 F:	drivers/watchdog/sl28cpld_wdt.c

+SL28 VPD NVMEM LAYOUT DRIVER
+M:	Michael Walle <michael@walle.cc>
+S:	Maintained
+F:	Documentation/devicetree/bindings/nvmem/layouts/kontron,sl28-vpd.yaml
+F:	drivers/nvmem/layouts/sl28vpd.c
+
 SLAB ALLOCATOR
 M:	Christoph Lameter <cl@linux.com>
 M:	Pekka Enberg <penberg@kernel.org>
@ -22566,7 +22577,7 @@ S:	Orphan
 F:	drivers/mmc/host/vub300.c

 W1 DALLAS'S 1-WIRE BUS
-M:	Evgeniy Polyakov <zbr@ioremap.net>
+M:	Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
 S:	Maintained
 F:	Documentation/devicetree/bindings/w1/
 F:	Documentation/w1/
--- a/arch/powerpc/configs/ppc6xx_defconfig
+++ b/arch/powerpc/configs/ppc6xx_defconfig
@ -614,8 +614,6 @@ CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=m
 CONFIG_NVRAM=y
 CONFIG_DTLK=m
-CONFIG_CARDMAN_4000=m
-CONFIG_CARDMAN_4040=m
 CONFIG_IPWIRELESS=m
 CONFIG_I2C_CHARDEV=m
 CONFIG_I2C_HYDRA=m
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@ -241,4 +241,6 @@ source "drivers/peci/Kconfig"

 source "drivers/hte/Kconfig"

+source "drivers/cdx/Kconfig"
+
 endmenu
--- a/drivers/Makefile
+++ b/drivers/Makefile
@ -194,3 +194,4 @@ obj-$(CONFIG_MOST)		+= most/
 obj-$(CONFIG_PECI)		+= peci/
 obj-$(CONFIG_HTE)		+= hte/
 obj-$(CONFIG_DRM_ACCEL)		+= accel/
+obj-$(CONFIG_CDX_BUS)		+= cdx/
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@ -810,9 +810,10 @@ static bool acpi_of_modalias(struct acpi_device *adev,
 * @modalias:   Pointer to buffer that modalias value will be copied into
 * @len:	Length of modalias buffer
 *
- * This is a counterpart of of_modalias_node() for struct acpi_device objects.
- * If there is a compatible string for @adev, it will be copied to @modalias
- * with the vendor prefix stripped; otherwise, @default_id will be used.
+ * This is a counterpart of of_alias_from_compatible() for struct acpi_device
+ * objects. If there is a compatible string for @adev, it will be copied to
+ * @modalias with the vendor prefix stripped; otherwise, @default_id will be
+ * used.
 */
 void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
 		       char *modalias, size_t len)
--- a/drivers/bus/mhi/ep/main.c
+++ b/drivers/bus/mhi/ep/main.c
@ -126,7 +126,7 @@ static int mhi_ep_process_cmd_ring(struct mhi_ep_ring *ring, struct mhi_ring_ele

 	/* Check if the channel is supported by the controller */
 	if ((ch_id >= mhi_cntrl->max_chan) || !mhi_cntrl->mhi_chan[ch_id].name) {
-		dev_err(dev, "Channel (%u) not supported!\n", ch_id);
+		dev_dbg(dev, "Channel (%u) not supported!\n", ch_id);
 		return -ENODEV;
 	}

@ -702,7 +702,7 @@ static void mhi_ep_cmd_ring_worker(struct work_struct *work)
 		el = &ring->ring_cache[ring->rd_offset];

 		ret = mhi_ep_process_cmd_ring(ring, el);
-		if (ret)
+		if (ret && ret != -ENODEV)
 			dev_err(dev, "Error processing cmd ring element: %zu\n", ring->rd_offset);

 		mhi_ep_ring_inc_index(ring);
--- a/drivers/bus/mhi/host/boot.c
+++ b/drivers/bus/mhi/host/boot.c
@ -391,6 +391,7 @@ void mhi_fw_load_handler(struct mhi_controller *mhi_cntrl)
 {
 	const struct firmware *firmware = NULL;
 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
+	enum mhi_pm_state new_state;
 	const char *fw_name;
 	void *buf;
 	dma_addr_t dma_addr;
@ -508,14 +509,18 @@ error_ready_state:
 	}

 error_fw_load:
-	mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
-	wake_up_all(&mhi_cntrl->state_event);
+	write_lock_irq(&mhi_cntrl->pm_lock);
+	new_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_FW_DL_ERR);
+	write_unlock_irq(&mhi_cntrl->pm_lock);
+	if (new_state == MHI_PM_FW_DL_ERR)
+		wake_up_all(&mhi_cntrl->state_event);
 }

 int mhi_download_amss_image(struct mhi_controller *mhi_cntrl)
 {
 	struct image_info *image_info = mhi_cntrl->fbc_image;
 	struct device *dev = &mhi_cntrl->mhi_dev->dev;
+	enum mhi_pm_state new_state;
 	int ret;

 	if (!image_info)
@ -526,8 +531,11 @@ int mhi_download_amss_image(struct mhi_controller *mhi_cntrl)
 			       &image_info->mhi_buf[image_info->entries - 1]);
 	if (ret) {
 		dev_err(dev, "MHI did not load AMSS, ret:%d\n", ret);
-		mhi_cntrl->pm_state = MHI_PM_FW_DL_ERR;
-		wake_up_all(&mhi_cntrl->state_event);
+		write_lock_irq(&mhi_cntrl->pm_lock);
+		new_state = mhi_tryset_pm_state(mhi_cntrl, MHI_PM_FW_DL_ERR);
+		write_unlock_irq(&mhi_cntrl->pm_lock);
+		if (new_state == MHI_PM_FW_DL_ERR)
+			wake_up_all(&mhi_cntrl->state_event);
 	}

 	return ret;
--- a/drivers/bus/mhi/host/init.c
+++ b/drivers/bus/mhi/host/init.c
@ -516,6 +516,12 @@ int mhi_init_mmio(struct mhi_controller *mhi_cntrl)
 		return -EIO;
 	}

+	if (val >= mhi_cntrl->reg_len - (8 * MHI_DEV_WAKE_DB)) {
+		dev_err(dev, "CHDB offset: 0x%x is out of range: 0x%zx\n",
+			val, mhi_cntrl->reg_len - (8 * MHI_DEV_WAKE_DB));
+		return -ERANGE;
+	}
+
 	/* Setup wake db */
 	mhi_cntrl->wake_db = base + val + (8 * MHI_DEV_WAKE_DB);
 	mhi_cntrl->wake_set = false;
@ -532,6 +538,12 @@ int mhi_init_mmio(struct mhi_controller *mhi_cntrl)
 		return -EIO;
 	}

+	if (val >= mhi_cntrl->reg_len - (8 * mhi_cntrl->total_ev_rings)) {
+		dev_err(dev, "ERDB offset: 0x%x is out of range: 0x%zx\n",
+			val, mhi_cntrl->reg_len - (8 * mhi_cntrl->total_ev_rings));
+		return -ERANGE;
+	}
+
 	/* Setup event db address for each ev_ring */
 	mhi_event = mhi_cntrl->mhi_event;
 	for (i = 0; i < mhi_cntrl->total_ev_rings; i++, val += 8, mhi_event++) {
@ -1100,7 +1112,7 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 	if (bhi_off >= mhi_cntrl->reg_len) {
 		dev_err(dev, "BHI offset: 0x%x is out of range: 0x%zx\n",
 			bhi_off, mhi_cntrl->reg_len);
-		ret = -EINVAL;
+		ret = -ERANGE;
 		goto error_reg_offset;
 	}
 	mhi_cntrl->bhi = mhi_cntrl->regs + bhi_off;
@ -1117,7 +1129,7 @@ int mhi_prepare_for_power_up(struct mhi_controller *mhi_cntrl)
 			dev_err(dev,
 				"BHIe offset: 0x%x is out of range: 0x%zx\n",
 				bhie_off, mhi_cntrl->reg_len);
-			ret = -EINVAL;
+			ret = -ERANGE;
 			goto error_reg_offset;
 		}
 		mhi_cntrl->bhie = mhi_cntrl->regs + bhie_off;
--- a/drivers/bus/mhi/host/main.c
+++ b/drivers/bus/mhi/host/main.c
@ -503,7 +503,7 @@ irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv)
 	}
 	write_unlock_irq(&mhi_cntrl->pm_lock);

-	if (pm_state != MHI_PM_SYS_ERR_DETECT || ee == mhi_cntrl->ee)
+	if (pm_state != MHI_PM_SYS_ERR_DETECT)
 		goto exit_intvec;

 	switch (ee) {
@ -961,7 +961,9 @@ int mhi_process_ctrl_ev_ring(struct mhi_controller *mhi_cntrl,
 	}

 	read_lock_bh(&mhi_cntrl->pm_lock);
-	if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
+
+	/* Ring EV DB only if there is any pending element to process */
+	if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)) && count)
 		mhi_ring_er_db(mhi_event);
 	read_unlock_bh(&mhi_cntrl->pm_lock);

@ -1031,7 +1033,9 @@ int mhi_process_data_event_ring(struct mhi_controller *mhi_cntrl,
 		count++;
 	}
 	read_lock_bh(&mhi_cntrl->pm_lock);
-	if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)))
+
+	/* Ring EV DB only if there is any pending element to process */
+	if (likely(MHI_DB_ACCESS_VALID(mhi_cntrl)) && count)
 		mhi_ring_er_db(mhi_event);
 	read_unlock_bh(&mhi_cntrl->pm_lock);

@ -1679,18 +1683,3 @@ void mhi_unprepare_from_transfer(struct mhi_device *mhi_dev)
 	}
 }
 EXPORT_SYMBOL_GPL(mhi_unprepare_from_transfer);
-
-int mhi_poll(struct mhi_device *mhi_dev, u32 budget)
-{
-	struct mhi_controller *mhi_cntrl = mhi_dev->mhi_cntrl;
-	struct mhi_chan *mhi_chan = mhi_dev->dl_chan;
-	struct mhi_event *mhi_event = &mhi_cntrl->mhi_event[mhi_chan->er_index];
-	int ret;
-
-	spin_lock_bh(&mhi_event->lock);
-	ret = mhi_event->process_event(mhi_cntrl, mhi_event, budget);
-	spin_unlock_bh(&mhi_event->lock);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(mhi_poll);
--- a/drivers/bus/mhi/host/pci_generic.c
+++ b/drivers/bus/mhi/host/pci_generic.c
@ -8,7 +8,6 @@
 * Copyright (C) 2020 Linaro Ltd <loic.poulain@linaro.org>
 */

-#include <linux/aer.h>
 #include <linux/delay.h>
 #include <linux/device.h>
 #include <linux/mhi.h>
@ -344,8 +343,6 @@ static const struct mhi_channel_config mhi_foxconn_sdx55_channels[] = {
 	MHI_CHANNEL_CONFIG_DL(13, "MBIM", 32, 0),
 	MHI_CHANNEL_CONFIG_UL(32, "DUN", 32, 0),
 	MHI_CHANNEL_CONFIG_DL(33, "DUN", 32, 0),
-	MHI_CHANNEL_CONFIG_UL(92, "DUN2", 32, 1),
-	MHI_CHANNEL_CONFIG_DL(93, "DUN2", 32, 1),
 	MHI_CHANNEL_CONFIG_HW_UL(100, "IP_HW0_MBIM", 128, 2),
 	MHI_CHANNEL_CONFIG_HW_DL(101, "IP_HW0_MBIM", 128, 3),
 };
@ -366,6 +363,15 @@ static const struct mhi_controller_config modem_foxconn_sdx55_config = {
 	.event_cfg = mhi_foxconn_sdx55_events,
 };

+static const struct mhi_pci_dev_info mhi_foxconn_sdx24_info = {
+	.name = "foxconn-sdx24",
+	.config = &modem_foxconn_sdx55_config,
+	.bar_num = MHI_PCI_DEFAULT_BAR_NUM,
+	.dma_data_width = 32,
+	.mru_default = 32768,
+	.sideband_wake = false,
+};
+
 static const struct mhi_pci_dev_info mhi_foxconn_sdx55_info = {
 	.name = "foxconn-sdx55",
 	.fw = "qcom/sdx55m/sbl1.mbn",
@ -590,6 +596,15 @@ static const struct pci_device_id mhi_pci_id_table[] = {
 	/* T99W373 (sdx62) */
 	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0d9),
 		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx65_info },
+	/* T99W510 (sdx24), variant 1 */
+	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0f0),
+		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx24_info },
+	/* T99W510 (sdx24), variant 2 */
+	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0f1),
+		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx24_info },
+	/* T99W510 (sdx24), variant 3 */
+	{ PCI_DEVICE(PCI_VENDOR_ID_FOXCONN, 0xe0f2),
+		.driver_data = (kernel_ulong_t) &mhi_foxconn_sdx24_info },
 	/* MV31-W (Cinterion) */
 	{ PCI_DEVICE(PCI_VENDOR_ID_THALES, 0x00b3),
 		.driver_data = (kernel_ulong_t) &mhi_mv31_info },
@ -903,11 +918,9 @@ static int mhi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 	mhi_pdev->pci_state = pci_store_saved_state(pdev);
 	pci_load_saved_state(pdev, NULL);

-	pci_enable_pcie_error_reporting(pdev);
-
 	err = mhi_register_controller(mhi_cntrl, mhi_cntrl_config);
 	if (err)
-		goto err_disable_reporting;
+		return err;

 	/* MHI bus does not power up the controller by default */
 	err = mhi_prepare_for_power_up(mhi_cntrl);
@ -941,8 +954,6 @@ err_unprepare:
 	mhi_unprepare_after_power_down(mhi_cntrl);
 err_unregister:
 	mhi_unregister_controller(mhi_cntrl);
-err_disable_reporting:
-	pci_disable_pcie_error_reporting(pdev);

 	return err;
 }
@ -965,7 +976,6 @@ static void mhi_pci_remove(struct pci_dev *pdev)
 		pm_runtime_get_noresume(&pdev->dev);

 	mhi_unregister_controller(mhi_cntrl);
-	pci_disable_pcie_error_reporting(pdev);
 }

 static void mhi_pci_shutdown(struct pci_dev *pdev)
--- a/drivers/cdx/Kconfig
+++ b/drivers/cdx/Kconfig
@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# CDX bus configuration
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+config CDX_BUS
+	bool "CDX Bus driver"
+	depends on OF && ARM64
+	help
+	  Driver to enable Composable DMA Transfer(CDX) Bus. CDX bus
+	  exposes Fabric devices which uses composable DMA IP to the
+	  APU. CDX bus provides a mechanism for scanning and probing
+	  of CDX devices. CDX devices are memory mapped on system bus
+	  for embedded CPUs. CDX bus uses CDX controller and firmware
+	  to scan these CDX devices.
+
+source "drivers/cdx/controller/Kconfig"
--- a/drivers/cdx/Makefile
+++ b/drivers/cdx/Makefile
@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for CDX
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+obj-$(CONFIG_CDX_BUS) += cdx.o controller/
--- a/drivers/cdx/cdx.c
+++ b/drivers/cdx/cdx.c
@ -0,0 +1,535 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX bus driver.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+/*
+ * Architecture Overview
+ * =====================
+ * CDX is a Hardware Architecture designed for AMD FPGA devices. It
+ * consists of sophisticated mechanism for interaction between FPGA,
+ * Firmware and the APUs (Application CPUs).
+ *
+ * Firmware resides on RPU (Realtime CPUs) which interacts with
+ * the FPGA program manager and the APUs. The RPU provides memory-mapped
+ * interface (RPU if) which is used to communicate with APUs.
+ *
+ * The diagram below shows an overview of the CDX architecture:
+ *
+ *          +--------------------------------------+
+ *          |    Application CPUs (APU)            |
+ *          |                                      |
+ *          |                    CDX device drivers|
+ *          |     Linux OS                |        |
+ *          |                        CDX bus       |
+ *          |                             |        |
+ *          |                     CDX controller   |
+ *          |                             |        |
+ *          +-----------------------------|--------+
+ *                                        | (discover, config,
+ *                                        |  reset, rescan)
+ *                                        |
+ *          +------------------------| RPU if |----+
+ *          |                             |        |
+ *          |                             V        |
+ *          |          Realtime CPUs (RPU)         |
+ *          |                                      |
+ *          +--------------------------------------+
+ *                                |
+ *          +---------------------|----------------+
+ *          |  FPGA               |                |
+ *          |      +-----------------------+       |
+ *          |      |           |           |       |
+ *          | +-------+    +-------+   +-------+   |
+ *          | | dev 1 |    | dev 2 |   | dev 3 |   |
+ *          | +-------+    +-------+   +-------+   |
+ *          +--------------------------------------+
+ *
+ * The RPU firmware extracts the device information from the loaded FPGA
+ * image and implements a mechanism that allows the APU drivers to
+ * enumerate such devices (device personality and resource details) via
+ * a dedicated communication channel. RPU mediates operations such as
+ * discover, reset and rescan of the FPGA devices for the APU. This is
+ * done using memory mapped interface provided by the RPU to APU.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/xarray.h>
+#include <linux/cdx/cdx_bus.h>
+#include "cdx.h"
+
+/* Default DMA mask for devices on a CDX bus */
+#define CDX_DEFAULT_DMA_MASK	(~0ULL)
+#define MAX_CDX_CONTROLLERS 16
+
+/* CDX controllers registered with the CDX bus */
+static DEFINE_XARRAY_ALLOC(cdx_controllers);
+
+/**
+ * cdx_dev_reset - Reset a CDX device
+ * @dev: CDX device
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int cdx_dev_reset(struct device *dev)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	struct cdx_controller *cdx = cdx_dev->cdx;
+	struct cdx_device_config dev_config = {0};
+	struct cdx_driver *cdx_drv;
+	int ret;
+
+	cdx_drv = to_cdx_driver(dev->driver);
+	/* Notify driver that device is being reset */
+	if (cdx_drv && cdx_drv->reset_prepare)
+		cdx_drv->reset_prepare(cdx_dev);
+
+	dev_config.type = CDX_DEV_RESET_CONF;
+	ret = cdx->ops->dev_configure(cdx, cdx_dev->bus_num,
+				      cdx_dev->dev_num, &dev_config);
+	if (ret)
+		dev_err(dev, "cdx device reset failed\n");
+
+	/* Notify driver that device reset is complete */
+	if (cdx_drv && cdx_drv->reset_done)
+		cdx_drv->reset_done(cdx_dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cdx_dev_reset);
+
+/**
+ * cdx_unregister_device - Unregister a CDX device
+ * @dev: CDX device
+ * @data: This is always passed as NULL, and is not used in this API,
+ *	  but is required here as the bus_for_each_dev() API expects
+ *	  the passed function (cdx_unregister_device) to have this
+ *	  as an argument.
+ *
+ * Return: 0 on success.
+ */
+static int cdx_unregister_device(struct device *dev,
+				 void *data)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	kfree(cdx_dev->driver_override);
+	cdx_dev->driver_override = NULL;
+	/*
+	 * Do not free cdx_dev here as it would be freed in
+	 * cdx_device_release() called from within put_device().
+	 */
+	device_del(&cdx_dev->dev);
+	put_device(&cdx_dev->dev);
+
+	return 0;
+}
+
+static void cdx_unregister_devices(struct bus_type *bus)
+{
+	/* Reset all the devices attached to cdx bus */
+	bus_for_each_dev(bus, NULL, NULL, cdx_unregister_device);
+}
+
+/**
+ * cdx_match_one_device - Tell if a CDX device structure has a matching
+ *			  CDX device id structure
+ * @id: single CDX device id structure to match
+ * @dev: the CDX device structure to match against
+ *
+ * Return: matching cdx_device_id structure or NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_one_device(const struct cdx_device_id *id,
+		     const struct cdx_device *dev)
+{
+	/* Use vendor ID and device ID for matching */
+	if ((id->vendor == CDX_ANY_ID || id->vendor == dev->vendor) &&
+	    (id->device == CDX_ANY_ID || id->device == dev->device))
+		return id;
+	return NULL;
+}
+
+/**
+ * cdx_match_id - See if a CDX device matches a given cdx_id table
+ * @ids: array of CDX device ID structures to search in
+ * @dev: the CDX device structure to match against.
+ *
+ * Used by a driver to check whether a CDX device is in its list of
+ * supported devices. Returns the matching cdx_device_id structure or
+ * NULL if there is no match.
+ *
+ * Return: matching cdx_device_id structure or NULL if there is no match.
+ */
+static inline const struct cdx_device_id *
+cdx_match_id(const struct cdx_device_id *ids, struct cdx_device *dev)
+{
+	if (ids) {
+		while (ids->vendor || ids->device) {
+			if (cdx_match_one_device(ids, dev))
+				return ids;
+			ids++;
+		}
+	}
+	return NULL;
+}
+
+/**
+ * cdx_bus_match - device to driver matching callback
+ * @dev: the cdx device to match against
+ * @drv: the device driver to search for matching cdx device
+ * structures
+ *
+ * Return: true on success, false otherwise.
+ */
+static int cdx_bus_match(struct device *dev, struct device_driver *drv)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	struct cdx_driver *cdx_drv = to_cdx_driver(drv);
+	const struct cdx_device_id *found_id = NULL;
+	const struct cdx_device_id *ids;
+
+	ids = cdx_drv->match_id_table;
+
+	/* When driver_override is set, only bind to the matching driver */
+	if (cdx_dev->driver_override && strcmp(cdx_dev->driver_override, drv->name))
+		return false;
+
+	found_id = cdx_match_id(ids, cdx_dev);
+	if (!found_id)
+		return false;
+
+	do {
+		/*
+		 * In case override_only was set, enforce driver_override
+		 * matching.
+		 */
+		if (!found_id->override_only)
+			return true;
+		if (cdx_dev->driver_override)
+			return true;
+
+		ids = found_id + 1;
+		found_id = cdx_match_id(ids, cdx_dev);
+	} while (found_id);
+
+	return false;
+}
+
+static int cdx_probe(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	int error;
+
+	error = cdx_drv->probe(cdx_dev);
+	if (error) {
+		dev_err_probe(dev, error, "%s failed\n", __func__);
+		return error;
+	}
+
+	return 0;
+}
+
+static void cdx_remove(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	if (cdx_drv && cdx_drv->remove)
+		cdx_drv->remove(cdx_dev);
+}
+
+static void cdx_shutdown(struct device *dev)
+{
+	struct cdx_driver *cdx_drv = to_cdx_driver(dev->driver);
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	if (cdx_drv && cdx_drv->shutdown)
+		cdx_drv->shutdown(cdx_dev);
+}
+
+static int cdx_dma_configure(struct device *dev)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	u32 input_id = cdx_dev->req_id;
+	int ret;
+
+	ret = of_dma_configure_id(dev, dev->parent->of_node, 0, &input_id);
+	if (ret && ret != -EPROBE_DEFER) {
+		dev_err(dev, "of_dma_configure_id() failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+/* show configuration fields */
+#define cdx_config_attr(field, format_string)	\
+static ssize_t	\
+field##_show(struct device *dev, struct device_attribute *attr, char *buf)	\
+{	\
+	struct cdx_device *cdx_dev = to_cdx_device(dev);	\
+	return sysfs_emit(buf, format_string, cdx_dev->field);	\
+}	\
+static DEVICE_ATTR_RO(field)
+
+cdx_config_attr(vendor, "0x%04x\n");
+cdx_config_attr(device, "0x%04x\n");
+
+static ssize_t remove_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	bool val;
+
+	if (kstrtobool(buf, &val) < 0)
+		return -EINVAL;
+
+	if (!val)
+		return -EINVAL;
+
+	if (device_remove_file_self(dev, attr)) {
+		int ret;
+
+		ret = cdx_unregister_device(dev, NULL);
+		if (ret)
+			return ret;
+	}
+
+	return count;
+}
+static DEVICE_ATTR_WO(remove);
+
+static ssize_t reset_store(struct device *dev, struct device_attribute *attr,
+			   const char *buf, size_t count)
+{
+	bool val;
+	int ret;
+
+	if (kstrtobool(buf, &val) < 0)
+		return -EINVAL;
+
+	if (!val)
+		return -EINVAL;
+
+	ret = cdx_dev_reset(dev);
+	if (ret)
+		return ret;
+
+	return count;
+}
+static DEVICE_ATTR_WO(reset);
+
+static ssize_t driver_override_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf, size_t count)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+	int ret;
+
+	if (WARN_ON(dev->bus != &cdx_bus_type))
+		return -EINVAL;
+
+	ret = driver_set_override(dev, &cdx_dev->driver_override, buf, count);
+	if (ret)
+		return ret;
+
+	return count;
+}
+
+static ssize_t driver_override_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	return sysfs_emit(buf, "%s\n", cdx_dev->driver_override);
+}
+static DEVICE_ATTR_RW(driver_override);
+
+static struct attribute *cdx_dev_attrs[] = {
+	&dev_attr_remove.attr,
+	&dev_attr_reset.attr,
+	&dev_attr_vendor.attr,
+	&dev_attr_device.attr,
+	&dev_attr_driver_override.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(cdx_dev);
+
+static ssize_t rescan_store(struct bus_type *bus,
+			    const char *buf, size_t count)
+{
+	struct cdx_controller *cdx;
+	unsigned long index;
+	bool val;
+
+	if (kstrtobool(buf, &val) < 0)
+		return -EINVAL;
+
+	if (!val)
+		return -EINVAL;
+
+	/* Unregister all the devices on the bus */
+	cdx_unregister_devices(&cdx_bus_type);
+
+	/* Rescan all the devices */
+	xa_for_each(&cdx_controllers, index, cdx) {
+		int ret;
+
+		ret = cdx->ops->scan(cdx);
+		if (ret)
+			dev_err(cdx->dev, "cdx bus scanning failed\n");
+	}
+
+	return count;
+}
+static BUS_ATTR_WO(rescan);
+
+static struct attribute *cdx_bus_attrs[] = {
+	&bus_attr_rescan.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(cdx_bus);
+
+struct bus_type cdx_bus_type = {
+	.name		= "cdx",
+	.match		= cdx_bus_match,
+	.probe		= cdx_probe,
+	.remove		= cdx_remove,
+	.shutdown	= cdx_shutdown,
+	.dma_configure	= cdx_dma_configure,
+	.bus_groups	= cdx_bus_groups,
+	.dev_groups	= cdx_dev_groups,
+};
+EXPORT_SYMBOL_GPL(cdx_bus_type);
+
+int __cdx_driver_register(struct cdx_driver *cdx_driver,
+			  struct module *owner)
+{
+	int error;
+
+	cdx_driver->driver.owner = owner;
+	cdx_driver->driver.bus = &cdx_bus_type;
+
+	error = driver_register(&cdx_driver->driver);
+	if (error) {
+		pr_err("driver_register() failed for %s: %d\n",
+		       cdx_driver->driver.name, error);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__cdx_driver_register);
+
+void cdx_driver_unregister(struct cdx_driver *cdx_driver)
+{
+	driver_unregister(&cdx_driver->driver);
+}
+EXPORT_SYMBOL_GPL(cdx_driver_unregister);
+
+static void cdx_device_release(struct device *dev)
+{
+	struct cdx_device *cdx_dev = to_cdx_device(dev);
+
+	kfree(cdx_dev);
+}
+
+int cdx_device_add(struct cdx_dev_params *dev_params)
+{
+	struct cdx_controller *cdx = dev_params->cdx;
+	struct device *parent = cdx->dev;
+	struct cdx_device *cdx_dev;
+	int ret;
+
+	cdx_dev = kzalloc(sizeof(*cdx_dev), GFP_KERNEL);
+	if (!cdx_dev)
+		return -ENOMEM;
+
+	/* Populate resource */
+	memcpy(cdx_dev->res, dev_params->res, sizeof(struct resource) *
+		dev_params->res_count);
+	cdx_dev->res_count = dev_params->res_count;
+
+	/* Populate CDX dev params */
+	cdx_dev->req_id = dev_params->req_id;
+	cdx_dev->vendor = dev_params->vendor;
+	cdx_dev->device = dev_params->device;
+	cdx_dev->bus_num = dev_params->bus_num;
+	cdx_dev->dev_num = dev_params->dev_num;
+	cdx_dev->cdx = dev_params->cdx;
+	cdx_dev->dma_mask = CDX_DEFAULT_DMA_MASK;
+
+	/* Initialize generic device */
+	device_initialize(&cdx_dev->dev);
+	cdx_dev->dev.parent = parent;
+	cdx_dev->dev.bus = &cdx_bus_type;
+	cdx_dev->dev.dma_mask = &cdx_dev->dma_mask;
+	cdx_dev->dev.release = cdx_device_release;
+
+	/* Set Name */
+	dev_set_name(&cdx_dev->dev, "cdx-%02x:%02x",
+		     ((cdx->id << CDX_CONTROLLER_ID_SHIFT) | (cdx_dev->bus_num & CDX_BUS_NUM_MASK)),
+		     cdx_dev->dev_num);
+
+	ret = device_add(&cdx_dev->dev);
+	if (ret) {
+		dev_err(&cdx_dev->dev,
+			"cdx device add failed: %d", ret);
+		goto fail;
+	}
+
+	return 0;
+fail:
+	/*
+	 * Do not free cdx_dev here as it would be freed in
+	 * cdx_device_release() called from put_device().
+	 */
+	put_device(&cdx_dev->dev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(cdx_device_add);
+
+int cdx_register_controller(struct cdx_controller *cdx)
+{
+	int ret;
+
+	ret = xa_alloc(&cdx_controllers, &cdx->id, cdx,
+		       XA_LIMIT(0, MAX_CDX_CONTROLLERS - 1), GFP_KERNEL);
+	if (ret) {
+		dev_err(cdx->dev,
+			"No free index available. Maximum controllers already registered\n");
+		cdx->id = (u8)MAX_CDX_CONTROLLERS;
+		return ret;
+	}
+
+	/* Scan all the devices */
+	cdx->ops->scan(cdx);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cdx_register_controller);
+
+void cdx_unregister_controller(struct cdx_controller *cdx)
+{
+	if (cdx->id >= MAX_CDX_CONTROLLERS)
+		return;
+
+	device_for_each_child(cdx->dev, NULL, cdx_unregister_device);
+	xa_erase(&cdx_controllers, cdx->id);
+}
+EXPORT_SYMBOL_GPL(cdx_unregister_controller);
+
+static int __init cdx_bus_init(void)
+{
+	return bus_register(&cdx_bus_type);
+}
+postcore_initcall(cdx_bus_init);
--- a/drivers/cdx/cdx.h
+++ b/drivers/cdx/cdx.h
@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Header file for the CDX Bus
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _CDX_H_
+#define _CDX_H_
+
+#include <linux/cdx/cdx_bus.h>
+
+/**
+ * struct cdx_dev_params - CDX device parameters
+ * @cdx: CDX controller associated with the device
+ * @parent: Associated CDX controller
+ * @vendor: Vendor ID for CDX device
+ * @device: Device ID for CDX device
+ * @bus_num: Bus number for this CDX device
+ * @dev_num: Device number for this device
+ * @res: array of MMIO region entries
+ * @res_count: number of valid MMIO regions
+ * @req_id: Requestor ID associated with CDX device
+ */
+struct cdx_dev_params {
+	struct cdx_controller *cdx;
+	u16 vendor;
+	u16 device;
+	u8 bus_num;
+	u8 dev_num;
+	struct resource res[MAX_CDX_DEV_RESOURCES];
+	u8 res_count;
+	u32 req_id;
+};
+
+/**
+ * cdx_register_controller - Register a CDX controller and its ports
+ *		on the CDX bus.
+ * @cdx: The CDX controller to register
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int cdx_register_controller(struct cdx_controller *cdx);
+
+/**
+ * cdx_unregister_controller - Unregister a CDX controller
+ * @cdx: The CDX controller to unregister
+ */
+void cdx_unregister_controller(struct cdx_controller *cdx);
+
+/**
+ * cdx_device_add - Add a CDX device. This function adds a CDX device
+ *		on the CDX bus as per the device parameters provided
+ *		by caller. It also creates and registers an associated
+ *		Linux generic device.
+ * @dev_params: device parameters associated with the device to be created.
+ *
+ * Return: -errno on failure, 0 on success.
+ */
+int cdx_device_add(struct cdx_dev_params *dev_params);
+
+#endif /* _CDX_H_ */
--- a/drivers/cdx/controller/Kconfig
+++ b/drivers/cdx/controller/Kconfig
@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# CDX controller configuration
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+if CDX_BUS
+
+config CDX_CONTROLLER
+	tristate "CDX bus controller"
+	select REMOTEPROC
+	select RPMSG
+	help
+	  CDX controller drives the CDX bus. It interacts with
+	  firmware to get the hardware devices and registers with
+	  the CDX bus. Say Y to enable the CDX hardware driver.
+
+	  If unsure, say N.
+
+config MCDI_LOGGING
+	bool "MCDI Logging for the CDX controller"
+	depends on CDX_CONTROLLER
+	help
+	  Enable MCDI Logging for
+	  the CDX Controller for debug
+	  purpose.
+
+	  If unsure, say N.
+
+endif
--- a/drivers/cdx/controller/Makefile
+++ b/drivers/cdx/controller/Makefile
@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for CDX controller drivers
+#
+# Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+#
+
+obj-$(CONFIG_CDX_CONTROLLER) += cdx-controller.o
+cdx-controller-objs := cdx_controller.o cdx_rpmsg.o mcdi.o mcdi_functions.o
--- a/drivers/cdx/controller/bitfield.h
+++ b/drivers/cdx/controller/bitfield.h
@ -0,0 +1,90 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright 2005-2006 Fen Systems Ltd.
+ * Copyright 2006-2013 Solarflare Communications Inc.
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef CDX_BITFIELD_H
+#define CDX_BITFIELD_H
+
+#include <linux/bitfield.h>
+
+/* Lowest bit numbers and widths */
+#define CDX_DWORD_LBN 0
+#define CDX_DWORD_WIDTH 32
+
+/* Specified attribute (e.g. LBN) of the specified field */
+#define CDX_VAL(field, attribute) field ## _ ## attribute
+/* Low bit number of the specified field */
+#define CDX_LOW_BIT(field) CDX_VAL(field, LBN)
+/* Bit width of the specified field */
+#define CDX_WIDTH(field) CDX_VAL(field, WIDTH)
+/* High bit number of the specified field */
+#define CDX_HIGH_BIT(field) (CDX_LOW_BIT(field) + CDX_WIDTH(field) - 1)
+
+/* A doubleword (i.e. 4 byte) datatype - little-endian in HW */
+struct cdx_dword {
+	__le32 cdx_u32;
+};
+
+/* Value expanders for printk */
+#define CDX_DWORD_VAL(dword)				\
+	((unsigned int)le32_to_cpu((dword).cdx_u32))
+
+/*
+ * Extract bit field portion [low,high) from the 32-bit little-endian
+ * element which contains bits [min,max)
+ */
+#define CDX_DWORD_FIELD(dword, field)					\
+	(FIELD_GET(GENMASK(CDX_HIGH_BIT(field), CDX_LOW_BIT(field)),	\
+		   le32_to_cpu((dword).cdx_u32)))
+
+/*
+ * Creates the portion of the named bit field that lies within the
+ * range [min,max).
+ */
+#define CDX_INSERT_FIELD(field, value)				\
+	(FIELD_PREP(GENMASK(CDX_HIGH_BIT(field),		\
+			    CDX_LOW_BIT(field)), value))
+
+/*
+ * Creates the portion of the named bit fields that lie within the
+ * range [min,max).
+ */
+#define CDX_INSERT_FIELDS(field1, value1,		\
+			  field2, value2,		\
+			  field3, value3,		\
+			  field4, value4,		\
+			  field5, value5,		\
+			  field6, value6,		\
+			  field7, value7)		\
+	(CDX_INSERT_FIELD(field1, (value1)) |		\
+	 CDX_INSERT_FIELD(field2, (value2)) |		\
+	 CDX_INSERT_FIELD(field3, (value3)) |		\
+	 CDX_INSERT_FIELD(field4, (value4)) |		\
+	 CDX_INSERT_FIELD(field5, (value5)) |		\
+	 CDX_INSERT_FIELD(field6, (value6)) |		\
+	 CDX_INSERT_FIELD(field7, (value7)))
+
+#define CDX_POPULATE_DWORD(dword, ...)					\
+	(dword).cdx_u32 = cpu_to_le32(CDX_INSERT_FIELDS(__VA_ARGS__))
+
+/* Populate a dword field with various numbers of arguments */
+#define CDX_POPULATE_DWORD_7 CDX_POPULATE_DWORD
+#define CDX_POPULATE_DWORD_6(dword, ...) \
+	CDX_POPULATE_DWORD_7(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_POPULATE_DWORD_5(dword, ...) \
+	CDX_POPULATE_DWORD_6(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_POPULATE_DWORD_4(dword, ...) \
+	CDX_POPULATE_DWORD_5(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_POPULATE_DWORD_3(dword, ...) \
+	CDX_POPULATE_DWORD_4(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_POPULATE_DWORD_2(dword, ...) \
+	CDX_POPULATE_DWORD_3(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_POPULATE_DWORD_1(dword, ...) \
+	CDX_POPULATE_DWORD_2(dword, CDX_DWORD, 0, __VA_ARGS__)
+#define CDX_SET_DWORD(dword) \
+	CDX_POPULATE_DWORD_1(dword, CDX_DWORD, 0xffffffff)
+
+#endif /* CDX_BITFIELD_H */
--- a/drivers/cdx/controller/cdx_controller.c
+++ b/drivers/cdx/controller/cdx_controller.c
@ -0,0 +1,230 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CDX host controller driver for AMD versal-net platform.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/cdx/cdx_bus.h>
+
+#include "cdx_controller.h"
+#include "../cdx.h"
+#include "mcdi_functions.h"
+#include "mcdi.h"
+
+static unsigned int cdx_mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
+{
+	return MCDI_RPC_TIMEOUT;
+}
+
+static void cdx_mcdi_request(struct cdx_mcdi *cdx,
+			     const struct cdx_dword *hdr, size_t hdr_len,
+			     const struct cdx_dword *sdu, size_t sdu_len)
+{
+	if (cdx_rpmsg_send(cdx, hdr, hdr_len, sdu, sdu_len))
+		dev_err(&cdx->rpdev->dev, "Failed to send rpmsg data\n");
+}
+
+static const struct cdx_mcdi_ops mcdi_ops = {
+	.mcdi_rpc_timeout = cdx_mcdi_rpc_timeout,
+	.mcdi_request = cdx_mcdi_request,
+};
+
+void cdx_rpmsg_post_probe(struct cdx_controller *cdx)
+{
+	/* Register CDX controller with CDX bus driver */
+	if (cdx_register_controller(cdx))
+		dev_err(cdx->dev, "Failed to register CDX controller\n");
+}
+
+void cdx_rpmsg_pre_remove(struct cdx_controller *cdx)
+{
+	cdx_unregister_controller(cdx);
+	cdx_mcdi_wait_for_quiescence(cdx->priv, MCDI_RPC_TIMEOUT);
+}
+
+static int cdx_configure_device(struct cdx_controller *cdx,
+				u8 bus_num, u8 dev_num,
+				struct cdx_device_config *dev_config)
+{
+	int ret = 0;
+
+	switch (dev_config->type) {
+	case CDX_DEV_RESET_CONF:
+		ret = cdx_mcdi_reset_device(cdx->priv, bus_num, dev_num);
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static int cdx_scan_devices(struct cdx_controller *cdx)
+{
+	struct cdx_mcdi *cdx_mcdi = cdx->priv;
+	u8 bus_num, dev_num, num_cdx_bus;
+	int ret;
+
+	/* MCDI FW Read: Fetch the number of CDX buses on this controller */
+	ret = cdx_mcdi_get_num_buses(cdx_mcdi);
+	if (ret < 0) {
+		dev_err(cdx->dev,
+			"Get number of CDX buses failed: %d\n", ret);
+		return ret;
+	}
+	num_cdx_bus = (u8)ret;
+
+	for (bus_num = 0; bus_num < num_cdx_bus; bus_num++) {
+		u8 num_cdx_dev;
+
+		/* MCDI FW Read: Fetch the number of devices present */
+		ret = cdx_mcdi_get_num_devs(cdx_mcdi, bus_num);
+		if (ret < 0) {
+			dev_err(cdx->dev,
+				"Get devices on CDX bus %d failed: %d\n", bus_num, ret);
+			continue;
+		}
+		num_cdx_dev = (u8)ret;
+
+		for (dev_num = 0; dev_num < num_cdx_dev; dev_num++) {
+			struct cdx_dev_params dev_params;
+
+			/* MCDI FW: Get the device config */
+			ret = cdx_mcdi_get_dev_config(cdx_mcdi, bus_num,
+						      dev_num, &dev_params);
+			if (ret) {
+				dev_err(cdx->dev,
+					"CDX device config get failed for %d(bus):%d(dev), %d\n",
+					bus_num, dev_num, ret);
+				continue;
+			}
+			dev_params.cdx = cdx;
+
+			/* Add the device to the cdx bus */
+			ret = cdx_device_add(&dev_params);
+			if (ret) {
+				dev_err(cdx->dev, "registering cdx dev: %d failed: %d\n",
+					dev_num, ret);
+				continue;
+			}
+
+			dev_dbg(cdx->dev, "CDX dev: %d on cdx bus: %d created\n",
+				dev_num, bus_num);
+		}
+	}
+
+	return 0;
+}
+
+static struct cdx_ops cdx_ops = {
+	.scan		= cdx_scan_devices,
+	.dev_configure	= cdx_configure_device,
+};
+
+static int xlnx_cdx_probe(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx;
+	struct cdx_mcdi *cdx_mcdi;
+	int ret;
+
+	cdx_mcdi = kzalloc(sizeof(*cdx_mcdi), GFP_KERNEL);
+	if (!cdx_mcdi)
+		return -ENOMEM;
+
+	/* Store the MCDI ops */
+	cdx_mcdi->mcdi_ops = &mcdi_ops;
+	/* MCDI FW: Initialize the FW path */
+	ret = cdx_mcdi_init(cdx_mcdi);
+	if (ret) {
+		dev_err_probe(&pdev->dev, ret, "MCDI Initialization failed\n");
+		goto mcdi_init_fail;
+	}
+
+	cdx = kzalloc(sizeof(*cdx), GFP_KERNEL);
+	if (!cdx) {
+		ret = -ENOMEM;
+		goto cdx_alloc_fail;
+	}
+	platform_set_drvdata(pdev, cdx);
+
+	cdx->dev = &pdev->dev;
+	cdx->priv = cdx_mcdi;
+	cdx->ops = &cdx_ops;
+
+	ret = cdx_setup_rpmsg(pdev);
+	if (ret) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "Failed to register CDX RPMsg transport\n");
+		goto cdx_rpmsg_fail;
+	}
+
+	dev_info(&pdev->dev, "Successfully registered CDX controller with RPMsg as transport\n");
+	return 0;
+
+cdx_rpmsg_fail:
+	kfree(cdx);
+cdx_alloc_fail:
+	cdx_mcdi_finish(cdx_mcdi);
+mcdi_init_fail:
+	kfree(cdx_mcdi);
+
+	return ret;
+}
+
+static int xlnx_cdx_remove(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx = platform_get_drvdata(pdev);
+	struct cdx_mcdi *cdx_mcdi = cdx->priv;
+
+	cdx_destroy_rpmsg(pdev);
+
+	kfree(cdx);
+
+	cdx_mcdi_finish(cdx_mcdi);
+	kfree(cdx_mcdi);
+
+	return 0;
+}
+
+static const struct of_device_id cdx_match_table[] = {
+	{.compatible = "xlnx,versal-net-cdx",},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, cdx_match_table);
+
+static struct platform_driver cdx_pdriver = {
+	.driver = {
+		   .name = "cdx-controller",
+		   .pm = NULL,
+		   .of_match_table = cdx_match_table,
+		   },
+	.probe = xlnx_cdx_probe,
+	.remove = xlnx_cdx_remove,
+};
+
+static int __init cdx_controller_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&cdx_pdriver);
+	if (ret)
+		pr_err("platform_driver_register() failed: %d\n", ret);
+
+	return ret;
+}
+
+static void __exit cdx_controller_exit(void)
+{
+	platform_driver_unregister(&cdx_pdriver);
+}
+
+module_init(cdx_controller_init);
+module_exit(cdx_controller_exit);
+
+MODULE_AUTHOR("AMD Inc.");
+MODULE_DESCRIPTION("CDX controller for AMD devices");
+MODULE_LICENSE("GPL");
--- a/drivers/cdx/controller/cdx_controller.h
+++ b/drivers/cdx/controller/cdx_controller.h
@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Header file for the CDX Controller
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef _CDX_CONTROLLER_H_
+#define _CDX_CONTROLLER_H_
+
+#include <linux/cdx/cdx_bus.h>
+#include "mcdi_functions.h"
+
+void cdx_rpmsg_post_probe(struct cdx_controller *cdx);
+
+void cdx_rpmsg_pre_remove(struct cdx_controller *cdx);
+
+int cdx_rpmsg_send(struct cdx_mcdi *cdx_mcdi,
+		   const struct cdx_dword *hdr, size_t hdr_len,
+		   const struct cdx_dword *sdu, size_t sdu_len);
+
+void cdx_rpmsg_read_resp(struct cdx_mcdi *cdx_mcdi,
+			 struct cdx_dword *outbuf, size_t offset,
+			 size_t outlen);
+
+int cdx_setup_rpmsg(struct platform_device *pdev);
+
+void cdx_destroy_rpmsg(struct platform_device *pdev);
+
+#endif /* _CDX_CONT_PRIV_H_ */
--- a/drivers/cdx/controller/cdx_rpmsg.c
+++ b/drivers/cdx/controller/cdx_rpmsg.c
@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Platform driver for CDX bus.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/rpmsg.h>
+#include <linux/remoteproc.h>
+#include <linux/of_platform.h>
+#include <linux/cdx/cdx_bus.h>
+#include <linux/module.h>
+
+#include "../cdx.h"
+#include "cdx_controller.h"
+#include "mcdi_functions.h"
+#include "mcdi.h"
+
+static struct rpmsg_device_id cdx_rpmsg_id_table[] = {
+	{ .name = "mcdi_ipc" },
+	{ },
+};
+MODULE_DEVICE_TABLE(rpmsg, cdx_rpmsg_id_table);
+
+int cdx_rpmsg_send(struct cdx_mcdi *cdx_mcdi,
+		   const struct cdx_dword *hdr, size_t hdr_len,
+		   const struct cdx_dword *sdu, size_t sdu_len)
+{
+	unsigned char *send_buf;
+	int ret;
+
+	send_buf = kzalloc(hdr_len + sdu_len, GFP_KERNEL);
+	if (!send_buf)
+		return -ENOMEM;
+
+	memcpy(send_buf, hdr, hdr_len);
+	memcpy(send_buf + hdr_len, sdu, sdu_len);
+
+	ret = rpmsg_send(cdx_mcdi->ept, send_buf, hdr_len + sdu_len);
+	kfree(send_buf);
+
+	return ret;
+}
+
+static int cdx_attach_to_rproc(struct platform_device *pdev)
+{
+	struct device_node *r5_core_node;
+	struct cdx_controller *cdx_c;
+	struct cdx_mcdi *cdx_mcdi;
+	struct device *dev;
+	struct rproc *rp;
+	int ret;
+
+	dev = &pdev->dev;
+	cdx_c = platform_get_drvdata(pdev);
+	cdx_mcdi = cdx_c->priv;
+
+	r5_core_node = of_parse_phandle(dev->of_node, "xlnx,rproc", 0);
+	if (!r5_core_node) {
+		dev_err(&pdev->dev, "xlnx,rproc: invalid phandle\n");
+		return -EINVAL;
+	}
+
+	rp = rproc_get_by_phandle(r5_core_node->phandle);
+	if (!rp) {
+		ret = -EPROBE_DEFER;
+		goto pdev_err;
+	}
+
+	/* Attach to remote processor */
+	ret = rproc_boot(rp);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to attach to remote processor\n");
+		rproc_put(rp);
+		goto pdev_err;
+	}
+
+	cdx_mcdi->r5_rproc = rp;
+pdev_err:
+	of_node_put(r5_core_node);
+	return ret;
+}
+
+static void cdx_detach_to_r5(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx_c;
+	struct cdx_mcdi *cdx_mcdi;
+
+	cdx_c = platform_get_drvdata(pdev);
+	cdx_mcdi = cdx_c->priv;
+
+	rproc_detach(cdx_mcdi->r5_rproc);
+	rproc_put(cdx_mcdi->r5_rproc);
+}
+
+static int cdx_rpmsg_cb(struct rpmsg_device *rpdev, void *data,
+			int len, void *priv, u32 src)
+{
+	struct cdx_controller *cdx_c = dev_get_drvdata(&rpdev->dev);
+	struct cdx_mcdi *cdx_mcdi = cdx_c->priv;
+
+	if (len > MCDI_BUF_LEN)
+		return -EINVAL;
+
+	cdx_mcdi_process_cmd(cdx_mcdi, (struct cdx_dword *)data, len);
+
+	return 0;
+}
+
+static void cdx_rpmsg_post_probe_work(struct work_struct *work)
+{
+	struct cdx_controller *cdx_c;
+	struct cdx_mcdi *cdx_mcdi;
+
+	cdx_mcdi = container_of(work, struct cdx_mcdi, work);
+	cdx_c = dev_get_drvdata(&cdx_mcdi->rpdev->dev);
+	cdx_rpmsg_post_probe(cdx_c);
+}
+
+static int cdx_rpmsg_probe(struct rpmsg_device *rpdev)
+{
+	struct rpmsg_channel_info chinfo = {0};
+	struct cdx_controller *cdx_c;
+	struct cdx_mcdi *cdx_mcdi;
+
+	cdx_c = (struct cdx_controller *)cdx_rpmsg_id_table[0].driver_data;
+	cdx_mcdi = cdx_c->priv;
+
+	chinfo.src = RPMSG_ADDR_ANY;
+	chinfo.dst = rpdev->dst;
+	strscpy(chinfo.name, cdx_rpmsg_id_table[0].name,
+		strlen(cdx_rpmsg_id_table[0].name));
+
+	cdx_mcdi->ept = rpmsg_create_ept(rpdev, cdx_rpmsg_cb, NULL, chinfo);
+	if (!cdx_mcdi->ept) {
+		dev_err_probe(&rpdev->dev, -ENXIO,
+			      "Failed to create ept for channel %s\n",
+			      chinfo.name);
+		return -EINVAL;
+	}
+
+	cdx_mcdi->rpdev = rpdev;
+	dev_set_drvdata(&rpdev->dev, cdx_c);
+
+	schedule_work(&cdx_mcdi->work);
+	return 0;
+}
+
+static void cdx_rpmsg_remove(struct rpmsg_device *rpdev)
+{
+	struct cdx_controller *cdx_c = dev_get_drvdata(&rpdev->dev);
+	struct cdx_mcdi *cdx_mcdi = cdx_c->priv;
+
+	flush_work(&cdx_mcdi->work);
+	cdx_rpmsg_pre_remove(cdx_c);
+
+	rpmsg_destroy_ept(cdx_mcdi->ept);
+	dev_set_drvdata(&rpdev->dev, NULL);
+}
+
+static struct rpmsg_driver cdx_rpmsg_driver = {
+	.drv.name = KBUILD_MODNAME,
+	.id_table = cdx_rpmsg_id_table,
+	.probe = cdx_rpmsg_probe,
+	.remove = cdx_rpmsg_remove,
+	.callback = cdx_rpmsg_cb,
+};
+
+int cdx_setup_rpmsg(struct platform_device *pdev)
+{
+	struct cdx_controller *cdx_c;
+	struct cdx_mcdi *cdx_mcdi;
+	int ret;
+
+	/* Attach to remote processor */
+	ret = cdx_attach_to_rproc(pdev);
+	if (ret)
+		return ret;
+
+	cdx_c = platform_get_drvdata(pdev);
+	cdx_mcdi = cdx_c->priv;
+
+	/* Register RPMsg driver */
+	cdx_rpmsg_id_table[0].driver_data = (kernel_ulong_t)cdx_c;
+
+	INIT_WORK(&cdx_mcdi->work, cdx_rpmsg_post_probe_work);
+	ret = register_rpmsg_driver(&cdx_rpmsg_driver);
+	if (ret) {
+		dev_err(&pdev->dev,
+			"Failed to register cdx RPMsg driver: %d\n", ret);
+		cdx_detach_to_r5(pdev);
+	}
+
+	return ret;
+}
+
+void cdx_destroy_rpmsg(struct platform_device *pdev)
+{
+	unregister_rpmsg_driver(&cdx_rpmsg_driver);
+
+	cdx_detach_to_r5(pdev);
+}
--- a/drivers/cdx/controller/mc_cdx_pcol.h
+++ b/drivers/cdx/controller/mc_cdx_pcol.h
@ -0,0 +1,590 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Driver for AMD network controllers and boards
+ *
+ * Copyright (C) 2021, Xilinx, Inc.
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef MC_CDX_PCOL_H
+#define MC_CDX_PCOL_H
+
+/* The current version of the MCDI protocol. */
+#define MCDI_PCOL_VERSION		2
+
+/*
+ * Each MCDI request starts with an MCDI_HEADER, which is a 32bit
+ * structure, filled in by the client.
+ *
+ *       0       7  8     16    20     22  23  24    31
+ *      | CODE | R | LEN | SEQ | Rsvd | E | R | XFLAGS |
+ *               |                      |   |
+ *               |                      |   \--- Response
+ *               |                      \------- Error
+ *               \------------------------------ Resync (always set)
+ *
+ * The client writes its request into MC shared memory, and rings the
+ * doorbell. Each request is completed either by the MC writing
+ * back into shared memory, or by writing out an event.
+ *
+ * All MCDI commands support completion by shared memory response. Each
+ * request may also contain additional data (accounted for by HEADER.LEN),
+ * and some responses may also contain additional data (again, accounted
+ * for by HEADER.LEN).
+ *
+ * Some MCDI commands support completion by event, in which any associated
+ * response data is included in the event.
+ *
+ * The protocol requires one response to be delivered for every request; a
+ * request should not be sent unless the response for the previous request
+ * has been received (either by polling shared memory, or by receiving
+ * an event).
+ */
+
+/** Request/Response structure */
+#define MCDI_HEADER_OFST		0
+#define MCDI_HEADER_CODE_LBN		0
+#define MCDI_HEADER_CODE_WIDTH		7
+#define MCDI_HEADER_RESYNC_LBN		7
+#define MCDI_HEADER_RESYNC_WIDTH	1
+#define MCDI_HEADER_DATALEN_LBN		8
+#define MCDI_HEADER_DATALEN_WIDTH	8
+#define MCDI_HEADER_SEQ_LBN		16
+#define MCDI_HEADER_SEQ_WIDTH		4
+#define MCDI_HEADER_RSVD_LBN		20
+#define MCDI_HEADER_RSVD_WIDTH		1
+#define MCDI_HEADER_NOT_EPOCH_LBN	21
+#define MCDI_HEADER_NOT_EPOCH_WIDTH	1
+#define MCDI_HEADER_ERROR_LBN		22
+#define MCDI_HEADER_ERROR_WIDTH		1
+#define MCDI_HEADER_RESPONSE_LBN	23
+#define MCDI_HEADER_RESPONSE_WIDTH	1
+#define MCDI_HEADER_XFLAGS_LBN		24
+#define MCDI_HEADER_XFLAGS_WIDTH	8
+/* Request response using event */
+#define MCDI_HEADER_XFLAGS_EVREQ	0x01
+/* Request (and signal) early doorbell return */
+#define MCDI_HEADER_XFLAGS_DBRET	0x02
+
+/* Maximum number of payload bytes */
+#define MCDI_CTL_SDU_LEN_MAX_V2		0x400
+
+#define MCDI_CTL_SDU_LEN_MAX MCDI_CTL_SDU_LEN_MAX_V2
+
+/*
+ * The MC can generate events for two reasons:
+ *   - To advance a shared memory request if XFLAGS_EVREQ was set
+ *   - As a notification (link state, i2c event), controlled
+ *     via MC_CMD_LOG_CTRL
+ *
+ * Both events share a common structure:
+ *
+ *  0      32     33      36    44     52     60
+ * | Data | Cont | Level | Src | Code | Rsvd |
+ *           |
+ *           \ There is another event pending in this notification
+ *
+ * If Code==CMDDONE, then the fields are further interpreted as:
+ *
+ *   - LEVEL==INFO    Command succeeded
+ *   - LEVEL==ERR     Command failed
+ *
+ *    0     8         16      24     32
+ *   | Seq | Datalen | Errno | Rsvd |
+ *
+ *   These fields are taken directly out of the standard MCDI header, i.e.,
+ *   LEVEL==ERR, Datalen == 0 => Reboot
+ *
+ * Events can be squirted out of the UART (using LOG_CTRL) without a
+ * MCDI header.  An event can be distinguished from a MCDI response by
+ * examining the first byte which is 0xc0.  This corresponds to the
+ * non-existent MCDI command MC_CMD_DEBUG_LOG.
+ *
+ *      0         7        8
+ *     | command | Resync |     = 0xc0
+ *
+ * Since the event is written in big-endian byte order, this works
+ * providing bits 56-63 of the event are 0xc0.
+ *
+ *      56     60  63
+ *     | Rsvd | Code |    = 0xc0
+ *
+ * Which means for convenience the event code is 0xc for all MC
+ * generated events.
+ */
+
+/*
+ * the errno value may be followed by the (0-based) number of the
+ * first argument that could not be processed.
+ */
+#define MC_CMD_ERR_ARG_OFST		4
+
+/* MC_CMD_ERR MCDI error codes. */
+/* Operation not permitted. */
+#define MC_CMD_ERR_EPERM		0x1
+/* Non-existent command target */
+#define MC_CMD_ERR_ENOENT		0x2
+/* assert() has killed the MC */
+#define MC_CMD_ERR_EINTR		0x4
+/* I/O failure */
+#define MC_CMD_ERR_EIO			0x5
+/* Already exists */
+#define MC_CMD_ERR_EEXIST		0x6
+/* Try again */
+#define MC_CMD_ERR_EAGAIN		0xb
+/* Out of memory */
+#define MC_CMD_ERR_ENOMEM		0xc
+/* Caller does not hold required locks */
+#define MC_CMD_ERR_EACCES		0xd
+/* Resource is currently unavailable (e.g. lock contention) */
+#define MC_CMD_ERR_EBUSY		0x10
+/* No such device */
+#define MC_CMD_ERR_ENODEV		0x13
+/* Invalid argument to target */
+#define MC_CMD_ERR_EINVAL		0x16
+/* No space */
+#define MC_CMD_ERR_ENOSPC		0x1c
+/* Read-only */
+#define MC_CMD_ERR_EROFS		0x1e
+/* Broken pipe */
+#define MC_CMD_ERR_EPIPE		0x20
+/* Out of range */
+#define MC_CMD_ERR_ERANGE		0x22
+/* Non-recursive resource is already acquired */
+#define MC_CMD_ERR_EDEADLK		0x23
+/* Operation not implemented */
+#define MC_CMD_ERR_ENOSYS		0x26
+/* Operation timed out */
+#define MC_CMD_ERR_ETIME		0x3e
+/* Link has been severed */
+#define MC_CMD_ERR_ENOLINK		0x43
+/* Protocol error */
+#define MC_CMD_ERR_EPROTO		0x47
+/* Bad message */
+#define MC_CMD_ERR_EBADMSG		0x4a
+/* Operation not supported */
+#define MC_CMD_ERR_ENOTSUP		0x5f
+/* Address not available */
+#define MC_CMD_ERR_EADDRNOTAVAIL	0x63
+/* Not connected */
+#define MC_CMD_ERR_ENOTCONN		0x6b
+/* Operation already in progress */
+#define MC_CMD_ERR_EALREADY		0x72
+/* Stale handle. The handle references resource that no longer exists */
+#define MC_CMD_ERR_ESTALE		0x74
+/* Resource allocation failed. */
+#define MC_CMD_ERR_ALLOC_FAIL		0x1000
+/* V-adaptor not found. */
+#define MC_CMD_ERR_NO_VADAPTOR		0x1001
+/* EVB port not found. */
+#define MC_CMD_ERR_NO_EVB_PORT		0x1002
+/* V-switch not found. */
+#define MC_CMD_ERR_NO_VSWITCH		0x1003
+/* Too many VLAN tags. */
+#define MC_CMD_ERR_VLAN_LIMIT		0x1004
+/* Bad PCI function number. */
+#define MC_CMD_ERR_BAD_PCI_FUNC		0x1005
+/* Invalid VLAN mode. */
+#define MC_CMD_ERR_BAD_VLAN_MODE	0x1006
+/* Invalid v-switch type. */
+#define MC_CMD_ERR_BAD_VSWITCH_TYPE	0x1007
+/* Invalid v-port type. */
+#define MC_CMD_ERR_BAD_VPORT_TYPE	0x1008
+/* MAC address exists. */
+#define MC_CMD_ERR_MAC_EXIST		0x1009
+/* Slave core not present */
+#define MC_CMD_ERR_SLAVE_NOT_PRESENT	0x100a
+/* The datapath is disabled. */
+#define MC_CMD_ERR_DATAPATH_DISABLED	0x100b
+/* The requesting client is not a function */
+#define MC_CMD_ERR_CLIENT_NOT_FN	0x100c
+/*
+ * The requested operation might require the command to be passed between
+ * MCs, and the transport doesn't support that. Should only ever been seen over
+ * the UART.
+ */
+#define MC_CMD_ERR_NO_PRIVILEGE		0x1013
+/*
+ * Workaround 26807 could not be turned on/off because some functions
+ * have already installed filters. See the comment at
+ * MC_CMD_WORKAROUND_BUG26807. May also returned for other operations such as
+ * sub-variant switching.
+ */
+#define MC_CMD_ERR_FILTERS_PRESENT	0x1014
+/* The clock whose frequency you've attempted to set doesn't exist */
+#define MC_CMD_ERR_NO_CLOCK		0x1015
+/*
+ * Returned by MC_CMD_TESTASSERT if the action that should have caused an
+ * assertion failed to do so.
+ */
+#define MC_CMD_ERR_UNREACHABLE		0x1016
+/*
+ * This command needs to be processed in the background but there were no
+ * resources to do so. Send it again after a command has completed.
+ */
+#define MC_CMD_ERR_QUEUE_FULL		0x1017
+/*
+ * The operation could not be completed because the PCIe link has gone
+ * away. This error code is never expected to be returned over the TLP
+ * transport.
+ */
+#define MC_CMD_ERR_NO_PCIE		0x1018
+/*
+ * The operation could not be completed because the datapath has gone
+ * away. This is distinct from MC_CMD_ERR_DATAPATH_DISABLED in that the
+ * datapath absence may be temporary
+ */
+#define MC_CMD_ERR_NO_DATAPATH		0x1019
+/* The operation could not complete because some VIs are allocated */
+#define MC_CMD_ERR_VIS_PRESENT		0x101a
+/*
+ * The operation could not complete because some PIO buffers are
+ * allocated
+ */
+#define MC_CMD_ERR_PIOBUFS_PRESENT	0x101b
+
+/***********************************/
+/*
+ * MC_CMD_CDX_BUS_ENUM_BUSES
+ * CDX bus hosts devices (functions) that are implemented using the Composable
+ * DMA subsystem and directly mapped into the memory space of the FGPA PSX
+ * Application Processors (APUs). As such, they only apply to the PSX APU side,
+ * not the host (PCIe). Unlike PCIe, these devices have no native configuration
+ * space or enumeration mechanism, so this message set provides a minimal
+ * interface for discovery and management (bus reset, FLR, BME) of such
+ * devices. This command returns the number of CDX buses present in the system.
+ */
+#define MC_CMD_CDX_BUS_ENUM_BUSES				0x1
+#define MC_CMD_CDX_BUS_ENUM_BUSES_MSGSET			0x1
+#undef MC_CMD_0x1_PRIVILEGE_CTG
+
+#define MC_CMD_0x1_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_BUS_ENUM_BUSES_IN msgrequest */
+#define MC_CMD_CDX_BUS_ENUM_BUSES_IN_LEN			0
+
+/* MC_CMD_CDX_BUS_ENUM_BUSES_OUT msgresponse */
+#define MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN			4
+/*
+ * Number of CDX buses present in the system. Buses are numbered 0 to
+ * BUS_COUNT-1
+ */
+#define MC_CMD_CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT_OFST		0
+#define MC_CMD_CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT_LEN		4
+
+/***********************************/
+/*
+ * MC_CMD_CDX_BUS_ENUM_DEVICES
+ * Enumerate CDX bus devices on a given bus
+ */
+#define MC_CMD_CDX_BUS_ENUM_DEVICES				0x2
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_MSGSET			0x2
+#undef MC_CMD_0x2_PRIVILEGE_CTG
+
+#define MC_CMD_0x2_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_BUS_ENUM_DEVICES_IN msgrequest */
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_IN_LEN			4
+/*
+ * Bus number to enumerate, in range 0 to BUS_COUNT-1, as returned by
+ * MC_CMD_CDX_BUS_ENUM_BUSES_OUT
+ */
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_IN_BUS_OFST			0
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_IN_BUS_LEN			4
+
+/* MC_CMD_CDX_BUS_ENUM_DEVICES_OUT msgresponse */
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN			4
+/*
+ * Number of devices present on the bus. Devices on the bus are numbered 0 to
+ * DEVICE_COUNT-1. Returns EAGAIN if number of devices unknown or if the target
+ * devices are not ready (e.g. undergoing a bus reset)
+ */
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT_OFST	0
+#define MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT_LEN	4
+
+/***********************************/
+/*
+ * MC_CMD_CDX_BUS_GET_DEVICE_CONFIG
+ * Returns device identification and MMIO/MSI resource data for a CDX device.
+ * The expected usage is for the caller to first retrieve the number of devices
+ * on the bus using MC_CMD_BUS_ENUM_DEVICES, then loop through the range (0,
+ * DEVICE_COUNT - 1), retrieving device resource data. May return EAGAIN if the
+ * number of exposed devices or device resources change during enumeration (due
+ * to e.g. a PL reload / bus reset), in which case the caller is expected to
+ * restart the enumeration loop. MMIO addresses are specified in terms of bus
+ * addresses (prior to any potential IOMMU translation). For versal-net, these
+ * are equivalent to APU physical addresses. Implementation note - for this to
+ * work, the implementation needs to keep state (generation count) per client.
+ */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG					0x3
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_MSGSET					0x3
+#undef MC_CMD_0x3_PRIVILEGE_CTG
+
+#define MC_CMD_0x3_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN msgrequest */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_LEN					8
+/* Device bus number, in range 0 to BUS_COUNT-1 */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_BUS_OFST				0
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_BUS_LEN				4
+/* Device number relative to the bus, in range 0 to DEVICE_COUNT-1 for that bus */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE_OFST				4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE_LEN				4
+
+/* MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT msgresponse */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN				88
+/* 16-bit Vendor identifier, compliant with PCI-SIG VendorID assignment. */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID_OFST			0
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID_LEN			2
+/* 16-bit Device ID assigned by the vendor */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID_OFST			2
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID_LEN			2
+/*
+ * 16-bit Subsystem Vendor ID, , compliant with PCI-SIG VendorID assignment.
+ * For further device differentiation, as required. 0 if unused.
+ */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID_OFST		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_VENDOR_ID_LEN		2
+/*
+ * 16-bit Subsystem Device ID assigned by the vendor. For further device
+ * differentiation, as required. 0 if unused.
+ */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID_OFST		6
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_SUBSYS_DEVICE_ID_LEN		2
+/* 24-bit Device Class code, compliant with PCI-SIG Device Class codes */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS_OFST			8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_CLASS_LEN			3
+/* 8-bit vendor-assigned revision */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION_OFST		11
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_REVISION_LEN		1
+/* Reserved (alignment) */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_RESERVED_OFST			12
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_RESERVED_LEN			4
+/* MMIO region 0 base address (bus address), 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_OFST		16
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_LO_OFST		16
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_LO_LBN		128
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_HI_OFST		20
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_HI_LBN		160
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE_HI_WIDTH		32
+/* MMIO region 0 size, 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_OFST		24
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_LO_OFST		24
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_LO_LBN		192
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_HI_OFST		28
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_HI_LBN		224
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE_HI_WIDTH		32
+/* MMIO region 1 base address (bus address), 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_OFST		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_LO_OFST		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_LO_LBN		256
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_HI_OFST		36
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_HI_LBN		288
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE_HI_WIDTH		32
+/* MMIO region 1 size, 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_OFST		40
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_LO_OFST		40
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_LO_LBN		320
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_HI_OFST		44
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_HI_LBN		352
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE_HI_WIDTH		32
+/* MMIO region 2 base address (bus address), 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_OFST		48
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_LO_OFST		48
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_LO_LBN		384
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_HI_OFST		52
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_HI_LBN		416
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE_HI_WIDTH		32
+/* MMIO region 2 size, 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_OFST		56
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_LO_OFST		56
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_LO_LBN		448
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_HI_OFST		60
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_HI_LBN		480
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE_HI_WIDTH		32
+/* MMIO region 3 base address (bus address), 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_OFST		64
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_LO_OFST		64
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_LO_LBN		512
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_HI_OFST		68
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_HI_LBN		544
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE_HI_WIDTH		32
+/* MMIO region 3 size, 0 if unused */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_OFST		72
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_LEN		8
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_LO_OFST		72
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_LO_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_LO_LBN		576
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_LO_WIDTH		32
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_HI_OFST		76
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_HI_LEN		4
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_HI_LBN		608
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE_HI_WIDTH		32
+/* MSI vector count */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MSI_COUNT_OFST			80
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_MSI_COUNT_LEN			4
+/* Requester ID used by device (SMMU StreamID, GIC ITS DeviceID) */
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID_OFST			84
+#define MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID_LEN			4
+
+/***********************************/
+/*
+ * MC_CMD_CDX_DEVICE_RESET
+ * After this call completes, device DMA and interrupts are quiesced, devices
+ * logic is reset in a hardware-specific way and DMA bus mastering is disabled.
+ */
+#define MC_CMD_CDX_DEVICE_RESET				0x6
+#define MC_CMD_CDX_DEVICE_RESET_MSGSET			0x6
+#undef MC_CMD_0x6_PRIVILEGE_CTG
+
+#define MC_CMD_0x6_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_DEVICE_RESET_IN msgrequest */
+#define MC_CMD_CDX_DEVICE_RESET_IN_LEN			8
+/* Device bus number, in range 0 to BUS_COUNT-1 */
+#define MC_CMD_CDX_DEVICE_RESET_IN_BUS_OFST		0
+#define MC_CMD_CDX_DEVICE_RESET_IN_BUS_LEN		4
+/* Device number relative to the bus, in range 0 to DEVICE_COUNT-1 for that bus */
+#define MC_CMD_CDX_DEVICE_RESET_IN_DEVICE_OFST		4
+#define MC_CMD_CDX_DEVICE_RESET_IN_DEVICE_LEN		4
+
+/*
+ * MC_CMD_CDX_DEVICE_RESET_OUT msgresponse: The device is quiesced and all
+ * pending device initiated DMA has completed.
+ */
+#define MC_CMD_CDX_DEVICE_RESET_OUT_LEN 0
+
+/***********************************/
+/*
+ * MC_CMD_CDX_DEVICE_CONTROL_SET
+ * If BUS_MASTER is set to disabled, device DMA and interrupts are quiesced.
+ * Pending DMA requests and MSI interrupts are flushed and no further DMA or
+ * interrupts are issued after this command returns. If BUS_MASTER is set to
+ * enabled, device is allowed to initiate DMA. Whether interrupts are enabled
+ * also depends on the value of MSI_ENABLE bit. Note that, in this case, the
+ * device may start DMA before the host receives and processes the MCDI
+ * response. MSI_ENABLE masks or unmasks device interrupts only. Note that for
+ * interrupts to be delivered to the host, both BUS_MASTER and MSI_ENABLE needs
+ * to be set. MMIO_REGIONS_ENABLE enables or disables host accesses to device
+ * MMIO regions. Note that an implementation is allowed to permanently set this
+ * bit to 1, in which case MC_CMD_CDX_DEVICE_CONTROL_GET will always return 1
+ * for this bit, regardless of the value set here.
+ */
+#define MC_CMD_CDX_DEVICE_CONTROL_SET					0x7
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_MSGSET				0x7
+#undef MC_CMD_0x7_PRIVILEGE_CTG
+
+#define MC_CMD_0x7_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_DEVICE_CONTROL_SET_IN msgrequest */
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_LEN				12
+/* Device bus number, in range 0 to BUS_COUNT-1 */
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_OFST			0
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_LEN			4
+/* Device number relative to the bus, in range 0 to DEVICE_COUNT-1 for that bus */
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_DEVICE_OFST			4
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_DEVICE_LEN			4
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_FLAGS_OFST			8
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_FLAGS_LEN			4
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_OFST		8
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_LBN		0
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_BUS_MASTER_ENABLE_WIDTH	1
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MSI_ENABLE_OFST		8
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MSI_ENABLE_LBN			1
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MSI_ENABLE_WIDTH		1
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MMIO_REGIONS_ENABLE_OFST	8
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MMIO_REGIONS_ENABLE_LBN	2
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_IN_MMIO_REGIONS_ENABLE_WIDTH	1
+
+/* MC_CMD_CDX_DEVICE_CONTROL_SET_OUT msgresponse */
+#define MC_CMD_CDX_DEVICE_CONTROL_SET_OUT_LEN				0
+
+/***********************************/
+/*
+ * MC_CMD_CDX_DEVICE_CONTROL_GET
+ * Returns device DMA, interrupt and MMIO region access control bits. See
+ * MC_CMD_CDX_DEVICE_CONTROL_SET for definition of the available control bits.
+ */
+#define MC_CMD_CDX_DEVICE_CONTROL_GET					0x8
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_MSGSET				0x8
+#undef MC_CMD_0x8_PRIVILEGE_CTG
+
+#define MC_CMD_0x8_PRIVILEGE_CTG SRIOV_CTG_ADMIN
+
+/* MC_CMD_CDX_DEVICE_CONTROL_GET_IN msgrequest */
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_IN_LEN				8
+/* Device bus number, in range 0 to BUS_COUNT-1 */
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_IN_BUS_OFST			0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_IN_BUS_LEN			4
+/* Device number relative to the bus, in range 0 to DEVICE_COUNT-1 for that bus */
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_IN_DEVICE_OFST			4
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_IN_DEVICE_LEN			4
+
+/* MC_CMD_CDX_DEVICE_CONTROL_GET_OUT msgresponse */
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_LEN				4
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_FLAGS_OFST			0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_FLAGS_LEN			4
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_BUS_MASTER_ENABLE_OFST	0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_BUS_MASTER_ENABLE_LBN		0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_BUS_MASTER_ENABLE_WIDTH	1
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MSI_ENABLE_OFST		0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MSI_ENABLE_LBN		1
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MSI_ENABLE_WIDTH		1
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MMIO_REGIONS_ENABLE_OFST	0
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MMIO_REGIONS_ENABLE_LBN	2
+#define MC_CMD_CDX_DEVICE_CONTROL_GET_OUT_MMIO_REGIONS_ENABLE_WIDTH	1
+
+/***********************************/
+/* MC_CMD_V2_EXTN - Encapsulation for a v2 extended command */
+#define MC_CMD_V2_EXTN					0x7f
+
+/* MC_CMD_V2_EXTN_IN msgrequest */
+#define MC_CMD_V2_EXTN_IN_LEN				4
+/* the extended command number */
+#define MC_CMD_V2_EXTN_IN_EXTENDED_CMD_LBN		0
+#define MC_CMD_V2_EXTN_IN_EXTENDED_CMD_WIDTH		15
+#define MC_CMD_V2_EXTN_IN_UNUSED_LBN			15
+#define MC_CMD_V2_EXTN_IN_UNUSED_WIDTH			1
+/* the actual length of the encapsulated command */
+#define MC_CMD_V2_EXTN_IN_ACTUAL_LEN_LBN		16
+#define MC_CMD_V2_EXTN_IN_ACTUAL_LEN_WIDTH		10
+#define MC_CMD_V2_EXTN_IN_UNUSED2_LBN			26
+#define MC_CMD_V2_EXTN_IN_UNUSED2_WIDTH			2
+/* Type of command/response */
+#define MC_CMD_V2_EXTN_IN_MESSAGE_TYPE_LBN		28
+#define MC_CMD_V2_EXTN_IN_MESSAGE_TYPE_WIDTH		4
+/*
+ * enum: MCDI command directed to versal-net. MCDI responses of this type
+ * are not defined.
+ */
+#define MC_CMD_V2_EXTN_IN_MCDI_MESSAGE_TYPE_PLATFORM	0x2
+
+#endif /* MC_CDX_PCOL_H */
--- a/drivers/cdx/controller/mcdi.c
+++ b/drivers/cdx/controller/mcdi.c
@ -0,0 +1,903 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Management-Controller-to-Driver Interface
+ *
+ * Copyright 2008-2013 Solarflare Communications Inc.
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_vlan.h>
+#include <linux/timer.h>
+#include <linux/list.h>
+#include <linux/pci.h>
+#include <linux/device.h>
+#include <linux/rwsem.h>
+#include <linux/vmalloc.h>
+#include <net/netevent.h>
+#include <linux/log2.h>
+#include <linux/net_tstamp.h>
+#include <linux/wait.h>
+
+#include "bitfield.h"
+#include "mcdi.h"
+
+struct cdx_mcdi_copy_buffer {
+	struct cdx_dword buffer[DIV_ROUND_UP(MCDI_CTL_SDU_LEN_MAX, 4)];
+};
+
+#ifdef CONFIG_MCDI_LOGGING
+#define LOG_LINE_MAX		(1024 - 32)
+#endif
+
+static void cdx_mcdi_cancel_cmd(struct cdx_mcdi *cdx, struct cdx_mcdi_cmd *cmd);
+static void cdx_mcdi_wait_for_cleanup(struct cdx_mcdi *cdx);
+static int cdx_mcdi_rpc_async_internal(struct cdx_mcdi *cdx,
+				       struct cdx_mcdi_cmd *cmd,
+				       unsigned int *handle);
+static void cdx_mcdi_start_or_queue(struct cdx_mcdi_iface *mcdi,
+				    bool allow_retry);
+static void cdx_mcdi_cmd_start_or_queue(struct cdx_mcdi_iface *mcdi,
+					struct cdx_mcdi_cmd *cmd);
+static bool cdx_mcdi_complete_cmd(struct cdx_mcdi_iface *mcdi,
+				  struct cdx_mcdi_cmd *cmd,
+				  struct cdx_dword *outbuf,
+				  int len,
+				  struct list_head *cleanup_list);
+static void cdx_mcdi_timeout_cmd(struct cdx_mcdi_iface *mcdi,
+				 struct cdx_mcdi_cmd *cmd,
+				 struct list_head *cleanup_list);
+static void cdx_mcdi_cmd_work(struct work_struct *context);
+static void cdx_mcdi_mode_fail(struct cdx_mcdi *cdx, struct list_head *cleanup_list);
+static void _cdx_mcdi_display_error(struct cdx_mcdi *cdx, unsigned int cmd,
+				    size_t inlen, int raw, int arg, int err_no);
+
+static bool cdx_cmd_cancelled(struct cdx_mcdi_cmd *cmd)
+{
+	return cmd->state == MCDI_STATE_RUNNING_CANCELLED;
+}
+
+static void cdx_mcdi_cmd_release(struct kref *ref)
+{
+	kfree(container_of(ref, struct cdx_mcdi_cmd, ref));
+}
+
+static unsigned int cdx_mcdi_cmd_handle(struct cdx_mcdi_cmd *cmd)
+{
+	return cmd->handle;
+}
+
+static void _cdx_mcdi_remove_cmd(struct cdx_mcdi_iface *mcdi,
+				 struct cdx_mcdi_cmd *cmd,
+				 struct list_head *cleanup_list)
+{
+	/* if cancelled, the completers have already been called */
+	if (cdx_cmd_cancelled(cmd))
+		return;
+
+	if (cmd->completer) {
+		list_add_tail(&cmd->cleanup_list, cleanup_list);
+		++mcdi->outstanding_cleanups;
+		kref_get(&cmd->ref);
+	}
+}
+
+static void cdx_mcdi_remove_cmd(struct cdx_mcdi_iface *mcdi,
+				struct cdx_mcdi_cmd *cmd,
+				struct list_head *cleanup_list)
+{
+	list_del(&cmd->list);
+	_cdx_mcdi_remove_cmd(mcdi, cmd, cleanup_list);
+	cmd->state = MCDI_STATE_FINISHED;
+	kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+	if (list_empty(&mcdi->cmd_list))
+		wake_up(&mcdi->cmd_complete_wq);
+}
+
+static unsigned long cdx_mcdi_rpc_timeout(struct cdx_mcdi *cdx, unsigned int cmd)
+{
+	if (!cdx->mcdi_ops->mcdi_rpc_timeout)
+		return MCDI_RPC_TIMEOUT;
+	else
+		return cdx->mcdi_ops->mcdi_rpc_timeout(cdx, cmd);
+}
+
+int cdx_mcdi_init(struct cdx_mcdi *cdx)
+{
+	struct cdx_mcdi_iface *mcdi;
+	int rc = -ENOMEM;
+
+	cdx->mcdi = kzalloc(sizeof(*cdx->mcdi), GFP_KERNEL);
+	if (!cdx->mcdi)
+		goto fail;
+
+	mcdi = cdx_mcdi_if(cdx);
+	mcdi->cdx = cdx;
+
+#ifdef CONFIG_MCDI_LOGGING
+	mcdi->logging_buffer = kmalloc(LOG_LINE_MAX, GFP_KERNEL);
+	if (!mcdi->logging_buffer)
+		goto fail2;
+#endif
+	mcdi->workqueue = alloc_ordered_workqueue("mcdi_wq", 0);
+	if (!mcdi->workqueue)
+		goto fail3;
+	mutex_init(&mcdi->iface_lock);
+	mcdi->mode = MCDI_MODE_EVENTS;
+	INIT_LIST_HEAD(&mcdi->cmd_list);
+	init_waitqueue_head(&mcdi->cmd_complete_wq);
+
+	mcdi->new_epoch = true;
+
+	return 0;
+fail3:
+#ifdef CONFIG_MCDI_LOGGING
+	kfree(mcdi->logging_buffer);
+fail2:
+#endif
+	kfree(cdx->mcdi);
+	cdx->mcdi = NULL;
+fail:
+	return rc;
+}
+
+void cdx_mcdi_finish(struct cdx_mcdi *cdx)
+{
+	struct cdx_mcdi_iface *mcdi;
+
+	mcdi = cdx_mcdi_if(cdx);
+	if (!mcdi)
+		return;
+
+	cdx_mcdi_wait_for_cleanup(cdx);
+
+#ifdef CONFIG_MCDI_LOGGING
+	kfree(mcdi->logging_buffer);
+#endif
+
+	destroy_workqueue(mcdi->workqueue);
+	kfree(cdx->mcdi);
+	cdx->mcdi = NULL;
+}
+
+static bool cdx_mcdi_flushed(struct cdx_mcdi_iface *mcdi, bool ignore_cleanups)
+{
+	bool flushed;
+
+	mutex_lock(&mcdi->iface_lock);
+	flushed = list_empty(&mcdi->cmd_list) &&
+		  (ignore_cleanups || !mcdi->outstanding_cleanups);
+	mutex_unlock(&mcdi->iface_lock);
+	return flushed;
+}
+
+/* Wait for outstanding MCDI commands to complete. */
+static void cdx_mcdi_wait_for_cleanup(struct cdx_mcdi *cdx)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+
+	if (!mcdi)
+		return;
+
+	wait_event(mcdi->cmd_complete_wq,
+		   cdx_mcdi_flushed(mcdi, false));
+}
+
+int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx,
+				 unsigned int timeout_jiffies)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+	DEFINE_WAIT_FUNC(wait, woken_wake_function);
+	int rc = 0;
+
+	if (!mcdi)
+		return -EINVAL;
+
+	flush_workqueue(mcdi->workqueue);
+
+	add_wait_queue(&mcdi->cmd_complete_wq, &wait);
+
+	while (!cdx_mcdi_flushed(mcdi, true)) {
+		rc = wait_woken(&wait, TASK_IDLE, timeout_jiffies);
+		if (rc)
+			continue;
+		break;
+	}
+
+	remove_wait_queue(&mcdi->cmd_complete_wq, &wait);
+
+	if (rc > 0)
+		rc = 0;
+	else if (rc == 0)
+		rc = -ETIMEDOUT;
+
+	return rc;
+}
+
+static u8 cdx_mcdi_payload_csum(const struct cdx_dword *hdr, size_t hdr_len,
+				const struct cdx_dword *sdu, size_t sdu_len)
+{
+	u8 *p = (u8 *)hdr;
+	u8 csum = 0;
+	int i;
+
+	for (i = 0; i < hdr_len; i++)
+		csum += p[i];
+
+	p = (u8 *)sdu;
+	for (i = 0; i < sdu_len; i++)
+		csum += p[i];
+
+	return ~csum & 0xff;
+}
+
+static void cdx_mcdi_send_request(struct cdx_mcdi *cdx,
+				  struct cdx_mcdi_cmd *cmd)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+	const struct cdx_dword *inbuf = cmd->inbuf;
+	size_t inlen = cmd->inlen;
+	struct cdx_dword hdr[2];
+	size_t hdr_len;
+	bool not_epoch;
+	u32 xflags;
+#ifdef CONFIG_MCDI_LOGGING
+	char *buf;
+#endif
+
+	if (!mcdi)
+		return;
+#ifdef CONFIG_MCDI_LOGGING
+	buf = mcdi->logging_buffer; /* page-sized */
+#endif
+
+	mcdi->prev_seq = cmd->seq;
+	mcdi->seq_held_by[cmd->seq] = cmd;
+	mcdi->db_held_by = cmd;
+	cmd->started = jiffies;
+
+	not_epoch = !mcdi->new_epoch;
+	xflags = 0;
+
+	/* MCDI v2 */
+	WARN_ON(inlen > MCDI_CTL_SDU_LEN_MAX_V2);
+	CDX_POPULATE_DWORD_7(hdr[0],
+			     MCDI_HEADER_RESPONSE, 0,
+			     MCDI_HEADER_RESYNC, 1,
+			     MCDI_HEADER_CODE, MC_CMD_V2_EXTN,
+			     MCDI_HEADER_DATALEN, 0,
+			     MCDI_HEADER_SEQ, cmd->seq,
+			     MCDI_HEADER_XFLAGS, xflags,
+			     MCDI_HEADER_NOT_EPOCH, not_epoch);
+	CDX_POPULATE_DWORD_3(hdr[1],
+			     MC_CMD_V2_EXTN_IN_EXTENDED_CMD, cmd->cmd,
+			     MC_CMD_V2_EXTN_IN_ACTUAL_LEN, inlen,
+			     MC_CMD_V2_EXTN_IN_MESSAGE_TYPE,
+			     MC_CMD_V2_EXTN_IN_MCDI_MESSAGE_TYPE_PLATFORM);
+	hdr_len = 8;
+
+#ifdef CONFIG_MCDI_LOGGING
+	if (!WARN_ON_ONCE(!buf)) {
+		const struct cdx_dword *frags[] = { hdr, inbuf };
+		const size_t frag_len[] = { hdr_len, round_up(inlen, 4) };
+		int bytes = 0;
+		int i, j;
+
+		for (j = 0; j < ARRAY_SIZE(frags); j++) {
+			const struct cdx_dword *frag;
+
+			frag = frags[j];
+			for (i = 0;
+			     i < frag_len[j] / 4;
+			     i++) {
+				/*
+				 * Do not exceed the internal printk limit.
+				 * The string before that is just over 70 bytes.
+				 */
+				if ((bytes + 75) > LOG_LINE_MAX) {
+					pr_info("MCDI RPC REQ:%s \\\n", buf);
+					bytes = 0;
+				}
+				bytes += snprintf(buf + bytes,
+						  LOG_LINE_MAX - bytes, " %08x",
+						  le32_to_cpu(frag[i].cdx_u32));
+			}
+		}
+
+		pr_info("MCDI RPC REQ:%s\n", buf);
+	}
+#endif
+	hdr[0].cdx_u32 |= (__force __le32)(cdx_mcdi_payload_csum(hdr, hdr_len, inbuf, inlen) <<
+			 MCDI_HEADER_XFLAGS_LBN);
+	cdx->mcdi_ops->mcdi_request(cdx, hdr, hdr_len, inbuf, inlen);
+
+	mcdi->new_epoch = false;
+}
+
+static int cdx_mcdi_errno(struct cdx_mcdi *cdx, unsigned int mcdi_err)
+{
+	switch (mcdi_err) {
+	case 0:
+	case MC_CMD_ERR_QUEUE_FULL:
+		return mcdi_err;
+	case MC_CMD_ERR_EPERM:
+		return -EPERM;
+	case MC_CMD_ERR_ENOENT:
+		return -ENOENT;
+	case MC_CMD_ERR_EINTR:
+		return -EINTR;
+	case MC_CMD_ERR_EAGAIN:
+		return -EAGAIN;
+	case MC_CMD_ERR_EACCES:
+		return -EACCES;
+	case MC_CMD_ERR_EBUSY:
+		return -EBUSY;
+	case MC_CMD_ERR_EINVAL:
+		return -EINVAL;
+	case MC_CMD_ERR_ERANGE:
+		return -ERANGE;
+	case MC_CMD_ERR_EDEADLK:
+		return -EDEADLK;
+	case MC_CMD_ERR_ENOSYS:
+		return -EOPNOTSUPP;
+	case MC_CMD_ERR_ETIME:
+		return -ETIME;
+	case MC_CMD_ERR_EALREADY:
+		return -EALREADY;
+	case MC_CMD_ERR_ENOSPC:
+		return -ENOSPC;
+	case MC_CMD_ERR_ENOMEM:
+		return -ENOMEM;
+	case MC_CMD_ERR_ENOTSUP:
+		return -EOPNOTSUPP;
+	case MC_CMD_ERR_ALLOC_FAIL:
+		return -ENOBUFS;
+	case MC_CMD_ERR_MAC_EXIST:
+		return -EADDRINUSE;
+	case MC_CMD_ERR_NO_EVB_PORT:
+		return -EAGAIN;
+	default:
+		return -EPROTO;
+	}
+}
+
+static void cdx_mcdi_process_cleanup_list(struct cdx_mcdi *cdx,
+					  struct list_head *cleanup_list)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+	unsigned int cleanups = 0;
+
+	if (!mcdi)
+		return;
+
+	while (!list_empty(cleanup_list)) {
+		struct cdx_mcdi_cmd *cmd =
+			list_first_entry(cleanup_list,
+					 struct cdx_mcdi_cmd, cleanup_list);
+		cmd->completer(cdx, cmd->cookie, cmd->rc,
+			       cmd->outbuf, cmd->outlen);
+		list_del(&cmd->cleanup_list);
+		kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+		++cleanups;
+	}
+
+	if (cleanups) {
+		bool all_done;
+
+		mutex_lock(&mcdi->iface_lock);
+		CDX_WARN_ON_PARANOID(cleanups > mcdi->outstanding_cleanups);
+		all_done = (mcdi->outstanding_cleanups -= cleanups) == 0;
+		mutex_unlock(&mcdi->iface_lock);
+		if (all_done)
+			wake_up(&mcdi->cmd_complete_wq);
+	}
+}
+
+static void _cdx_mcdi_cancel_cmd(struct cdx_mcdi_iface *mcdi,
+				 unsigned int handle,
+				 struct list_head *cleanup_list)
+{
+	struct cdx_mcdi_cmd *cmd;
+
+	list_for_each_entry(cmd, &mcdi->cmd_list, list)
+		if (cdx_mcdi_cmd_handle(cmd) == handle) {
+			switch (cmd->state) {
+			case MCDI_STATE_QUEUED:
+			case MCDI_STATE_RETRY:
+				pr_debug("command %#x inlen %zu cancelled in queue\n",
+					 cmd->cmd, cmd->inlen);
+				/* if not yet running, properly cancel it */
+				cmd->rc = -EPIPE;
+				cdx_mcdi_remove_cmd(mcdi, cmd, cleanup_list);
+				break;
+			case MCDI_STATE_RUNNING:
+			case MCDI_STATE_RUNNING_CANCELLED:
+			case MCDI_STATE_FINISHED:
+			default:
+				/* invalid state? */
+				WARN_ON(1);
+			}
+			break;
+		}
+}
+
+static void cdx_mcdi_cancel_cmd(struct cdx_mcdi *cdx, struct cdx_mcdi_cmd *cmd)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+	LIST_HEAD(cleanup_list);
+
+	if (!mcdi)
+		return;
+
+	mutex_lock(&mcdi->iface_lock);
+	cdx_mcdi_timeout_cmd(mcdi, cmd, &cleanup_list);
+	mutex_unlock(&mcdi->iface_lock);
+	cdx_mcdi_process_cleanup_list(cdx, &cleanup_list);
+}
+
+struct cdx_mcdi_blocking_data {
+	struct kref ref;
+	bool done;
+	wait_queue_head_t wq;
+	int rc;
+	struct cdx_dword *outbuf;
+	size_t outlen;
+	size_t outlen_actual;
+};
+
+static void cdx_mcdi_blocking_data_release(struct kref *ref)
+{
+	kfree(container_of(ref, struct cdx_mcdi_blocking_data, ref));
+}
+
+static void cdx_mcdi_rpc_completer(struct cdx_mcdi *cdx, unsigned long cookie,
+				   int rc, struct cdx_dword *outbuf,
+				   size_t outlen_actual)
+{
+	struct cdx_mcdi_blocking_data *wait_data =
+		(struct cdx_mcdi_blocking_data *)cookie;
+
+	wait_data->rc = rc;
+	memcpy(wait_data->outbuf, outbuf,
+	       min(outlen_actual, wait_data->outlen));
+	wait_data->outlen_actual = outlen_actual;
+	/* memory barrier */
+	smp_wmb();
+	wait_data->done = true;
+	wake_up(&wait_data->wq);
+	kref_put(&wait_data->ref, cdx_mcdi_blocking_data_release);
+}
+
+static int cdx_mcdi_rpc_sync(struct cdx_mcdi *cdx, unsigned int cmd,
+			     const struct cdx_dword *inbuf, size_t inlen,
+			     struct cdx_dword *outbuf, size_t outlen,
+			     size_t *outlen_actual, bool quiet)
+{
+	struct cdx_mcdi_blocking_data *wait_data;
+	struct cdx_mcdi_cmd *cmd_item;
+	unsigned int handle;
+	int rc;
+
+	if (outlen_actual)
+		*outlen_actual = 0;
+
+	wait_data = kmalloc(sizeof(*wait_data), GFP_KERNEL);
+	if (!wait_data)
+		return -ENOMEM;
+
+	cmd_item = kmalloc(sizeof(*cmd_item), GFP_KERNEL);
+	if (!cmd_item) {
+		kfree(wait_data);
+		return -ENOMEM;
+	}
+
+	kref_init(&wait_data->ref);
+	wait_data->done = false;
+	init_waitqueue_head(&wait_data->wq);
+	wait_data->outbuf = outbuf;
+	wait_data->outlen = outlen;
+
+	kref_init(&cmd_item->ref);
+	cmd_item->quiet = quiet;
+	cmd_item->cookie = (unsigned long)wait_data;
+	cmd_item->completer = &cdx_mcdi_rpc_completer;
+	cmd_item->cmd = cmd;
+	cmd_item->inlen = inlen;
+	cmd_item->inbuf = inbuf;
+
+	/* Claim an extra reference for the completer to put. */
+	kref_get(&wait_data->ref);
+	rc = cdx_mcdi_rpc_async_internal(cdx, cmd_item, &handle);
+	if (rc) {
+		kref_put(&wait_data->ref, cdx_mcdi_blocking_data_release);
+		goto out;
+	}
+
+	if (!wait_event_timeout(wait_data->wq, wait_data->done,
+				cdx_mcdi_rpc_timeout(cdx, cmd)) &&
+	    !wait_data->done) {
+		pr_err("MC command 0x%x inlen %zu timed out (sync)\n",
+		       cmd, inlen);
+
+		cdx_mcdi_cancel_cmd(cdx, cmd_item);
+
+		wait_data->rc = -ETIMEDOUT;
+		wait_data->outlen_actual = 0;
+	}
+
+	if (outlen_actual)
+		*outlen_actual = wait_data->outlen_actual;
+	rc = wait_data->rc;
+
+out:
+	kref_put(&wait_data->ref, cdx_mcdi_blocking_data_release);
+
+	return rc;
+}
+
+static bool cdx_mcdi_get_seq(struct cdx_mcdi_iface *mcdi, unsigned char *seq)
+{
+	*seq = mcdi->prev_seq;
+	do {
+		*seq = (*seq + 1) % ARRAY_SIZE(mcdi->seq_held_by);
+	} while (mcdi->seq_held_by[*seq] && *seq != mcdi->prev_seq);
+	return !mcdi->seq_held_by[*seq];
+}
+
+static int cdx_mcdi_rpc_async_internal(struct cdx_mcdi *cdx,
+				       struct cdx_mcdi_cmd *cmd,
+				       unsigned int *handle)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+	LIST_HEAD(cleanup_list);
+
+	if (!mcdi) {
+		kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+		return -ENETDOWN;
+	}
+
+	if (mcdi->mode == MCDI_MODE_FAIL) {
+		kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+		return -ENETDOWN;
+	}
+
+	cmd->mcdi = mcdi;
+	INIT_WORK(&cmd->work, cdx_mcdi_cmd_work);
+	INIT_LIST_HEAD(&cmd->list);
+	INIT_LIST_HEAD(&cmd->cleanup_list);
+	cmd->rc = 0;
+	cmd->outbuf = NULL;
+	cmd->outlen = 0;
+
+	queue_work(mcdi->workqueue, &cmd->work);
+	return 0;
+}
+
+static void cdx_mcdi_cmd_start_or_queue(struct cdx_mcdi_iface *mcdi,
+					struct cdx_mcdi_cmd *cmd)
+{
+	struct cdx_mcdi *cdx = mcdi->cdx;
+	u8 seq;
+
+	if (!mcdi->db_held_by &&
+	    cdx_mcdi_get_seq(mcdi, &seq)) {
+		cmd->seq = seq;
+		cmd->reboot_seen = false;
+		cdx_mcdi_send_request(cdx, cmd);
+		cmd->state = MCDI_STATE_RUNNING;
+	} else {
+		cmd->state = MCDI_STATE_QUEUED;
+	}
+}
+
+/* try to advance other commands */
+static void cdx_mcdi_start_or_queue(struct cdx_mcdi_iface *mcdi,
+				    bool allow_retry)
+{
+	struct cdx_mcdi_cmd *cmd, *tmp;
+
+	list_for_each_entry_safe(cmd, tmp, &mcdi->cmd_list, list)
+		if (cmd->state == MCDI_STATE_QUEUED ||
+		    (cmd->state == MCDI_STATE_RETRY && allow_retry))
+			cdx_mcdi_cmd_start_or_queue(mcdi, cmd);
+}
+
+void cdx_mcdi_process_cmd(struct cdx_mcdi *cdx, struct cdx_dword *outbuf, int len)
+{
+	struct cdx_mcdi_iface *mcdi;
+	struct cdx_mcdi_cmd *cmd;
+	LIST_HEAD(cleanup_list);
+	unsigned int respseq;
+
+	if (!len || !outbuf) {
+		pr_err("Got empty MC response\n");
+		return;
+	}
+
+	mcdi = cdx_mcdi_if(cdx);
+	if (!mcdi)
+		return;
+
+	respseq = CDX_DWORD_FIELD(outbuf[0], MCDI_HEADER_SEQ);
+
+	mutex_lock(&mcdi->iface_lock);
+	cmd = mcdi->seq_held_by[respseq];
+
+	if (cmd) {
+		if (cmd->state == MCDI_STATE_FINISHED) {
+			mutex_unlock(&mcdi->iface_lock);
+			kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+			return;
+		}
+
+		cdx_mcdi_complete_cmd(mcdi, cmd, outbuf, len, &cleanup_list);
+	} else {
+		pr_err("MC response unexpected for seq : %0X\n", respseq);
+	}
+
+	mutex_unlock(&mcdi->iface_lock);
+
+	cdx_mcdi_process_cleanup_list(mcdi->cdx, &cleanup_list);
+}
+
+static void cdx_mcdi_cmd_work(struct work_struct *context)
+{
+	struct cdx_mcdi_cmd *cmd =
+		container_of(context, struct cdx_mcdi_cmd, work);
+	struct cdx_mcdi_iface *mcdi = cmd->mcdi;
+
+	mutex_lock(&mcdi->iface_lock);
+
+	cmd->handle = mcdi->prev_handle++;
+	list_add_tail(&cmd->list, &mcdi->cmd_list);
+	cdx_mcdi_cmd_start_or_queue(mcdi, cmd);
+
+	mutex_unlock(&mcdi->iface_lock);
+}
+
+/*
+ * Returns true if the MCDI module is finished with the command.
+ * (examples of false would be if the command was proxied, or it was
+ * rejected by the MC due to lack of resources and requeued).
+ */
+static bool cdx_mcdi_complete_cmd(struct cdx_mcdi_iface *mcdi,
+				  struct cdx_mcdi_cmd *cmd,
+				  struct cdx_dword *outbuf,
+				  int len,
+				  struct list_head *cleanup_list)
+{
+	size_t resp_hdr_len, resp_data_len;
+	struct cdx_mcdi *cdx = mcdi->cdx;
+	unsigned int respcmd, error;
+	bool completed = false;
+	int rc;
+
+	/* ensure the command can't go away before this function returns */
+	kref_get(&cmd->ref);
+
+	respcmd = CDX_DWORD_FIELD(outbuf[0], MCDI_HEADER_CODE);
+	error = CDX_DWORD_FIELD(outbuf[0], MCDI_HEADER_ERROR);
+
+	if (respcmd != MC_CMD_V2_EXTN) {
+		resp_hdr_len = 4;
+		resp_data_len = CDX_DWORD_FIELD(outbuf[0], MCDI_HEADER_DATALEN);
+	} else {
+		resp_data_len = 0;
+		resp_hdr_len = 8;
+		if (len >= 8)
+			resp_data_len =
+				CDX_DWORD_FIELD(outbuf[1], MC_CMD_V2_EXTN_IN_ACTUAL_LEN);
+	}
+
+	if ((resp_hdr_len + resp_data_len) > len) {
+		pr_warn("Incomplete MCDI response received %d. Expected %zu\n",
+			len, (resp_hdr_len + resp_data_len));
+		resp_data_len = 0;
+	}
+
+#ifdef CONFIG_MCDI_LOGGING
+	if (!WARN_ON_ONCE(!mcdi->logging_buffer)) {
+		char *log = mcdi->logging_buffer;
+		int i, bytes = 0;
+		size_t rlen;
+
+		WARN_ON_ONCE(resp_hdr_len % 4);
+
+		rlen = resp_hdr_len / 4 + DIV_ROUND_UP(resp_data_len, 4);
+
+		for (i = 0; i < rlen; i++) {
+			if ((bytes + 75) > LOG_LINE_MAX) {
+				pr_info("MCDI RPC RESP:%s \\\n", log);
+				bytes = 0;
+			}
+			bytes += snprintf(log + bytes, LOG_LINE_MAX - bytes,
+					  " %08x", le32_to_cpu(outbuf[i].cdx_u32));
+		}
+
+		pr_info("MCDI RPC RESP:%s\n", log);
+	}
+#endif
+
+	if (error && resp_data_len == 0) {
+		/* MC rebooted during command */
+		rc = -EIO;
+	} else {
+		if (WARN_ON_ONCE(error && resp_data_len < 4))
+			resp_data_len = 4;
+		if (error) {
+			rc = CDX_DWORD_FIELD(outbuf[resp_hdr_len / 4], CDX_DWORD);
+			if (!cmd->quiet) {
+				int err_arg = 0;
+
+				if (resp_data_len >= MC_CMD_ERR_ARG_OFST + 4) {
+					int offset = (resp_hdr_len + MC_CMD_ERR_ARG_OFST) / 4;
+
+					err_arg = CDX_DWORD_VAL(outbuf[offset]);
+				}
+
+				_cdx_mcdi_display_error(cdx, cmd->cmd,
+							cmd->inlen, rc, err_arg,
+							cdx_mcdi_errno(cdx, rc));
+			}
+			rc = cdx_mcdi_errno(cdx, rc);
+		} else {
+			rc = 0;
+		}
+	}
+
+	/* free doorbell */
+	if (mcdi->db_held_by == cmd)
+		mcdi->db_held_by = NULL;
+
+	if (cdx_cmd_cancelled(cmd)) {
+		list_del(&cmd->list);
+		kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+		completed = true;
+	} else if (rc == MC_CMD_ERR_QUEUE_FULL) {
+		cmd->state = MCDI_STATE_RETRY;
+	} else {
+		cmd->rc = rc;
+		cmd->outbuf = outbuf + DIV_ROUND_UP(resp_hdr_len, 4);
+		cmd->outlen = resp_data_len;
+		cdx_mcdi_remove_cmd(mcdi, cmd, cleanup_list);
+		completed = true;
+	}
+
+	/* free sequence number and buffer */
+	mcdi->seq_held_by[cmd->seq] = NULL;
+
+	cdx_mcdi_start_or_queue(mcdi, rc != MC_CMD_ERR_QUEUE_FULL);
+
+	/* wake up anyone waiting for flush */
+	wake_up(&mcdi->cmd_complete_wq);
+
+	kref_put(&cmd->ref, cdx_mcdi_cmd_release);
+
+	return completed;
+}
+
+static void cdx_mcdi_timeout_cmd(struct cdx_mcdi_iface *mcdi,
+				 struct cdx_mcdi_cmd *cmd,
+				 struct list_head *cleanup_list)
+{
+	struct cdx_mcdi *cdx = mcdi->cdx;
+
+	pr_err("MC command 0x%x inlen %zu state %d timed out after %u ms\n",
+	       cmd->cmd, cmd->inlen, cmd->state,
+	       jiffies_to_msecs(jiffies - cmd->started));
+
+	cmd->rc = -ETIMEDOUT;
+	cdx_mcdi_remove_cmd(mcdi, cmd, cleanup_list);
+
+	cdx_mcdi_mode_fail(cdx, cleanup_list);
+}
+
+/**
+ * cdx_mcdi_rpc - Issue an MCDI command and wait for completion
+ * @cdx: NIC through which to issue the command
+ * @cmd: Command type number
+ * @inbuf: Command parameters
+ * @inlen: Length of command parameters, in bytes. Must be a multiple
+ *	of 4 and no greater than %MCDI_CTL_SDU_LEN_MAX_V1.
+ * @outbuf: Response buffer. May be %NULL if @outlen is 0.
+ * @outlen: Length of response buffer, in bytes. If the actual
+ *	response is longer than @outlen & ~3, it will be truncated
+ *	to that length.
+ * @outlen_actual: Pointer through which to return the actual response
+ *	length. May be %NULL if this is not needed.
+ *
+ * This function may sleep and therefore must be called in process
+ * context.
+ *
+ * Return: A negative error code, or zero if successful. The error
+ *	code may come from the MCDI response or may indicate a failure
+ *	to communicate with the MC. In the former case, the response
+ *	will still be copied to @outbuf and *@outlen_actual will be
+ *	set accordingly. In the latter case, *@outlen_actual will be
+ *	set to zero.
+ */
+int cdx_mcdi_rpc(struct cdx_mcdi *cdx, unsigned int cmd,
+		 const struct cdx_dword *inbuf, size_t inlen,
+		 struct cdx_dword *outbuf, size_t outlen,
+		 size_t *outlen_actual)
+{
+	return cdx_mcdi_rpc_sync(cdx, cmd, inbuf, inlen, outbuf, outlen,
+				 outlen_actual, false);
+}
+
+/**
+ * cdx_mcdi_rpc_async - Schedule an MCDI command to run asynchronously
+ * @cdx: NIC through which to issue the command
+ * @cmd: Command type number
+ * @inbuf: Command parameters
+ * @inlen: Length of command parameters, in bytes
+ * @complete: Function to be called on completion or cancellation.
+ * @cookie: Arbitrary value to be passed to @complete.
+ *
+ * This function does not sleep and therefore may be called in atomic
+ * context.  It will fail if event queues are disabled or if MCDI
+ * event completions have been disabled due to an error.
+ *
+ * If it succeeds, the @complete function will be called exactly once
+ * in process context, when one of the following occurs:
+ * (a) the completion event is received (in process context)
+ * (b) event queues are disabled (in the process that disables them)
+ */
+int
+cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd,
+		   const struct cdx_dword *inbuf, size_t inlen,
+		   cdx_mcdi_async_completer *complete, unsigned long cookie)
+{
+	struct cdx_mcdi_cmd *cmd_item =
+		kmalloc(sizeof(struct cdx_mcdi_cmd) + inlen, GFP_ATOMIC);
+
+	if (!cmd_item)
+		return -ENOMEM;
+
+	kref_init(&cmd_item->ref);
+	cmd_item->quiet = true;
+	cmd_item->cookie = cookie;
+	cmd_item->completer = complete;
+	cmd_item->cmd = cmd;
+	cmd_item->inlen = inlen;
+	/* inbuf is probably not valid after return, so take a copy */
+	cmd_item->inbuf = (struct cdx_dword *)(cmd_item + 1);
+	memcpy(cmd_item + 1, inbuf, inlen);
+
+	return cdx_mcdi_rpc_async_internal(cdx, cmd_item, NULL);
+}
+
+static void _cdx_mcdi_display_error(struct cdx_mcdi *cdx, unsigned int cmd,
+				    size_t inlen, int raw, int arg, int err_no)
+{
+	pr_err("MC command 0x%x inlen %d failed err_no=%d (raw=%d) arg=%d\n",
+	       cmd, (int)inlen, err_no, raw, arg);
+}
+
+/*
+ * Set MCDI mode to fail to prevent any new commands, then cancel any
+ * outstanding commands.
+ * Caller must hold the mcdi iface_lock.
+ */
+static void cdx_mcdi_mode_fail(struct cdx_mcdi *cdx, struct list_head *cleanup_list)
+{
+	struct cdx_mcdi_iface *mcdi = cdx_mcdi_if(cdx);
+
+	if (!mcdi)
+		return;
+
+	mcdi->mode = MCDI_MODE_FAIL;
+
+	while (!list_empty(&mcdi->cmd_list)) {
+		struct cdx_mcdi_cmd *cmd;
+
+		cmd = list_first_entry(&mcdi->cmd_list, struct cdx_mcdi_cmd,
+				       list);
+		_cdx_mcdi_cancel_cmd(mcdi, cdx_mcdi_cmd_handle(cmd), cleanup_list);
+	}
+}
--- a/drivers/cdx/controller/mcdi.h
+++ b/drivers/cdx/controller/mcdi.h
@ -0,0 +1,248 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Copyright 2008-2013 Solarflare Communications Inc.
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef CDX_MCDI_H
+#define CDX_MCDI_H
+
+#include <linux/mutex.h>
+#include <linux/kref.h>
+#include <linux/rpmsg.h>
+
+#include "bitfield.h"
+#include "mc_cdx_pcol.h"
+
+#ifdef DEBUG
+#define CDX_WARN_ON_ONCE_PARANOID(x) WARN_ON_ONCE(x)
+#define CDX_WARN_ON_PARANOID(x) WARN_ON(x)
+#else
+#define CDX_WARN_ON_ONCE_PARANOID(x) do {} while (0)
+#define CDX_WARN_ON_PARANOID(x) do {} while (0)
+#endif
+
+/**
+ * enum cdx_mcdi_mode - MCDI transaction mode
+ * @MCDI_MODE_EVENTS: wait for an mcdi response callback.
+ * @MCDI_MODE_FAIL: we think MCDI is dead, so fail-fast all calls
+ */
+enum cdx_mcdi_mode {
+	MCDI_MODE_EVENTS,
+	MCDI_MODE_FAIL,
+};
+
+#define MCDI_RPC_TIMEOUT	(10 * HZ)
+#define MCDI_RPC_LONG_TIMEOU	(60 * HZ)
+#define MCDI_RPC_POST_RST_TIME	(10 * HZ)
+
+#define MCDI_BUF_LEN (8 + MCDI_CTL_SDU_LEN_MAX)
+
+/**
+ * enum cdx_mcdi_cmd_state - State for an individual MCDI command
+ * @MCDI_STATE_QUEUED: Command not started and is waiting to run.
+ * @MCDI_STATE_RETRY: Command was submitted and MC rejected with no resources,
+ *	as MC have too many outstanding commands. Command will be retried once
+ *	another command returns.
+ * @MCDI_STATE_RUNNING: Command was accepted and is running.
+ * @MCDI_STATE_RUNNING_CANCELLED: Command is running but the issuer cancelled
+ *	the command.
+ * @MCDI_STATE_FINISHED: Processing of this command has completed.
+ */
+
+enum cdx_mcdi_cmd_state {
+	MCDI_STATE_QUEUED,
+	MCDI_STATE_RETRY,
+	MCDI_STATE_RUNNING,
+	MCDI_STATE_RUNNING_CANCELLED,
+	MCDI_STATE_FINISHED,
+};
+
+/**
+ * struct cdx_mcdi - CDX MCDI Firmware interface, to interact
+ *	with CDX controller.
+ * @mcdi: MCDI interface
+ * @mcdi_ops: MCDI operations
+ * @r5_rproc : R5 Remoteproc device handle
+ * @rpdev: RPMsg device
+ * @ept: RPMsg endpoint
+ * @work: Post probe work
+ */
+struct cdx_mcdi {
+	/* MCDI interface */
+	struct cdx_mcdi_data *mcdi;
+	const struct cdx_mcdi_ops *mcdi_ops;
+
+	struct rproc *r5_rproc;
+	struct rpmsg_device *rpdev;
+	struct rpmsg_endpoint *ept;
+	struct work_struct work;
+};
+
+struct cdx_mcdi_ops {
+	void (*mcdi_request)(struct cdx_mcdi *cdx,
+			     const struct cdx_dword *hdr, size_t hdr_len,
+			     const struct cdx_dword *sdu, size_t sdu_len);
+	unsigned int (*mcdi_rpc_timeout)(struct cdx_mcdi *cdx, unsigned int cmd);
+};
+
+typedef void cdx_mcdi_async_completer(struct cdx_mcdi *cdx,
+				      unsigned long cookie, int rc,
+				      struct cdx_dword *outbuf,
+				      size_t outlen_actual);
+
+/**
+ * struct cdx_mcdi_cmd - An outstanding MCDI command
+ * @ref: Reference count. There will be one reference if the command is
+ *	in the mcdi_iface cmd_list, another if it's on a cleanup list,
+ *	and a third if it's queued in the work queue.
+ * @list: The data for this entry in mcdi->cmd_list
+ * @cleanup_list: The data for this entry in a cleanup list
+ * @work: The work item for this command, queued in mcdi->workqueue
+ * @mcdi: The mcdi_iface for this command
+ * @state: The state of this command
+ * @inlen: inbuf length
+ * @inbuf: Input buffer
+ * @quiet: Whether to silence errors
+ * @reboot_seen: Whether a reboot has been seen during this command,
+ *	to prevent duplicates
+ * @seq: Sequence number
+ * @started: Jiffies this command was started at
+ * @cookie: Context for completion function
+ * @completer: Completion function
+ * @handle: Command handle
+ * @cmd: Command number
+ * @rc: Return code
+ * @outlen: Length of output buffer
+ * @outbuf: Output buffer
+ */
+struct cdx_mcdi_cmd {
+	struct kref ref;
+	struct list_head list;
+	struct list_head cleanup_list;
+	struct work_struct work;
+	struct cdx_mcdi_iface *mcdi;
+	enum cdx_mcdi_cmd_state state;
+	size_t inlen;
+	const struct cdx_dword *inbuf;
+	bool quiet;
+	bool reboot_seen;
+	u8 seq;
+	unsigned long started;
+	unsigned long cookie;
+	cdx_mcdi_async_completer *completer;
+	unsigned int handle;
+	unsigned int cmd;
+	int rc;
+	size_t outlen;
+	struct cdx_dword *outbuf;
+	/* followed by inbuf data if necessary */
+};
+
+/**
+ * struct cdx_mcdi_iface - MCDI protocol context
+ * @cdx: The associated NIC
+ * @iface_lock: Serialise access to this structure
+ * @outstanding_cleanups: Count of cleanups
+ * @cmd_list: List of outstanding and running commands
+ * @workqueue: Workqueue used for delayed processing
+ * @cmd_complete_wq: Waitqueue for command completion
+ * @db_held_by: Command the MC doorbell is in use by
+ * @seq_held_by: Command each sequence number is in use by
+ * @prev_handle: The last used command handle
+ * @mode: Poll for mcdi completion, or wait for an mcdi_event
+ * @prev_seq: The last used sequence number
+ * @new_epoch: Indicates start of day or start of MC reboot recovery
+ * @logging_buffer: Buffer that may be used to build MCDI tracing messages
+ * @logging_enabled: Whether to trace MCDI
+ */
+struct cdx_mcdi_iface {
+	struct cdx_mcdi *cdx;
+	/* Serialise access */
+	struct mutex iface_lock;
+	unsigned int outstanding_cleanups;
+	struct list_head cmd_list;
+	struct workqueue_struct *workqueue;
+	wait_queue_head_t cmd_complete_wq;
+	struct cdx_mcdi_cmd *db_held_by;
+	struct cdx_mcdi_cmd *seq_held_by[16];
+	unsigned int prev_handle;
+	enum cdx_mcdi_mode mode;
+	u8 prev_seq;
+	bool new_epoch;
+#ifdef CONFIG_MCDI_LOGGING
+	bool logging_enabled;
+	char *logging_buffer;
+#endif
+};
+
+/**
+ * struct cdx_mcdi_data - extra state for NICs that implement MCDI
+ * @iface: Interface/protocol state
+ * @fn_flags: Flags for this function, as returned by %MC_CMD_DRV_ATTACH.
+ */
+struct cdx_mcdi_data {
+	struct cdx_mcdi_iface iface;
+	u32 fn_flags;
+};
+
+static inline struct cdx_mcdi_iface *cdx_mcdi_if(struct cdx_mcdi *cdx)
+{
+	return cdx->mcdi ? &cdx->mcdi->iface : NULL;
+}
+
+int cdx_mcdi_init(struct cdx_mcdi *cdx);
+void cdx_mcdi_finish(struct cdx_mcdi *cdx);
+
+void cdx_mcdi_process_cmd(struct cdx_mcdi *cdx, struct cdx_dword *outbuf, int len);
+int cdx_mcdi_rpc(struct cdx_mcdi *cdx, unsigned int cmd,
+		 const struct cdx_dword *inbuf, size_t inlen,
+		 struct cdx_dword *outbuf, size_t outlen, size_t *outlen_actual);
+int cdx_mcdi_rpc_async(struct cdx_mcdi *cdx, unsigned int cmd,
+		       const struct cdx_dword *inbuf, size_t inlen,
+		       cdx_mcdi_async_completer *complete,
+		       unsigned long cookie);
+int cdx_mcdi_wait_for_quiescence(struct cdx_mcdi *cdx,
+				 unsigned int timeout_jiffies);
+
+/*
+ * We expect that 16- and 32-bit fields in MCDI requests and responses
+ * are appropriately aligned, but 64-bit fields are only
+ * 32-bit-aligned.
+ */
+#define MCDI_DECLARE_BUF(_name, _len) struct cdx_dword _name[DIV_ROUND_UP(_len, 4)] = {{0}}
+#define _MCDI_PTR(_buf, _offset)					\
+	((u8 *)(_buf) + (_offset))
+#define MCDI_PTR(_buf, _field)						\
+	_MCDI_PTR(_buf, MC_CMD_ ## _field ## _OFST)
+#define _MCDI_CHECK_ALIGN(_ofst, _align)				\
+	((void)BUILD_BUG_ON_ZERO((_ofst) & ((_align) - 1)),		\
+	 (_ofst))
+#define _MCDI_DWORD(_buf, _field)					\
+	((_buf) + (_MCDI_CHECK_ALIGN(MC_CMD_ ## _field ## _OFST, 4) >> 2))
+
+#define MCDI_BYTE(_buf, _field)						\
+	((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 1),	\
+	 *MCDI_PTR(_buf, _field))
+#define MCDI_WORD(_buf, _field)						\
+	((void)BUILD_BUG_ON_ZERO(MC_CMD_ ## _field ## _LEN != 2),	\
+	 le16_to_cpu(*(__force const __le16 *)MCDI_PTR(_buf, _field)))
+#define MCDI_SET_DWORD(_buf, _field, _value)				\
+	CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field), CDX_DWORD, _value)
+#define MCDI_DWORD(_buf, _field)					\
+	CDX_DWORD_FIELD(*_MCDI_DWORD(_buf, _field), CDX_DWORD)
+#define MCDI_POPULATE_DWORD_1(_buf, _field, _name1, _value1)		\
+	CDX_POPULATE_DWORD_1(*_MCDI_DWORD(_buf, _field),		\
+			     MC_CMD_ ## _name1, _value1)
+#define MCDI_SET_QWORD(_buf, _field, _value)				\
+	do {								\
+		CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[0],	\
+				     CDX_DWORD, (u32)(_value));	\
+		CDX_POPULATE_DWORD_1(_MCDI_DWORD(_buf, _field)[1],	\
+				     CDX_DWORD, (u64)(_value) >> 32);	\
+	} while (0)
+#define MCDI_QWORD(_buf, _field)					\
+	(CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[0], CDX_DWORD) |	\
+	(u64)CDX_DWORD_FIELD(_MCDI_DWORD(_buf, _field)[1], CDX_DWORD) << 32)
+
+#endif /* CDX_MCDI_H */
--- a/drivers/cdx/controller/mcdi_functions.c
+++ b/drivers/cdx/controller/mcdi_functions.c
@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#include <linux/module.h>
+
+#include "mcdi.h"
+#include "mcdi_functions.h"
+
+int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx)
+{
+	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN);
+	size_t outlen;
+	int ret;
+
+	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_BUSES, NULL, 0,
+			   outbuf, sizeof(outbuf), &outlen);
+	if (ret)
+		return ret;
+
+	if (outlen != MC_CMD_CDX_BUS_ENUM_BUSES_OUT_LEN)
+		return -EIO;
+
+	return MCDI_DWORD(outbuf, CDX_BUS_ENUM_BUSES_OUT_BUS_COUNT);
+}
+
+int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num)
+{
+	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN);
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_ENUM_DEVICES_IN_LEN);
+	size_t outlen;
+	int ret;
+
+	MCDI_SET_DWORD(inbuf, CDX_BUS_ENUM_DEVICES_IN_BUS, bus_num);
+
+	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_ENUM_DEVICES, inbuf, sizeof(inbuf),
+			   outbuf, sizeof(outbuf), &outlen);
+	if (ret)
+		return ret;
+
+	if (outlen != MC_CMD_CDX_BUS_ENUM_DEVICES_OUT_LEN)
+		return -EIO;
+
+	return MCDI_DWORD(outbuf, CDX_BUS_ENUM_DEVICES_OUT_DEVICE_COUNT);
+}
+
+int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,
+			    u8 bus_num, u8 dev_num,
+			    struct cdx_dev_params *dev_params)
+{
+	MCDI_DECLARE_BUF(outbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN);
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_IN_LEN);
+	struct resource *res = &dev_params->res[0];
+	size_t outlen;
+	u32 req_id;
+	int ret;
+
+	MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_BUS, bus_num);
+	MCDI_SET_DWORD(inbuf, CDX_BUS_GET_DEVICE_CONFIG_IN_DEVICE, dev_num);
+
+	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_BUS_GET_DEVICE_CONFIG, inbuf, sizeof(inbuf),
+			   outbuf, sizeof(outbuf), &outlen);
+	if (ret)
+		return ret;
+
+	if (outlen != MC_CMD_CDX_BUS_GET_DEVICE_CONFIG_OUT_LEN)
+		return -EIO;
+
+	dev_params->bus_num = bus_num;
+	dev_params->dev_num = dev_num;
+
+	req_id = MCDI_DWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_REQUESTER_ID);
+	dev_params->req_id = req_id;
+
+	dev_params->res_count = 0;
+	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) != 0) {
+		res[dev_params->res_count].start =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE);
+		res[dev_params->res_count].end =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_BASE) +
+				   MCDI_QWORD(outbuf,
+					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION0_SIZE) - 1;
+		res[dev_params->res_count].flags = IORESOURCE_MEM;
+		dev_params->res_count++;
+	}
+
+	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) != 0) {
+		res[dev_params->res_count].start =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE);
+		res[dev_params->res_count].end =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_BASE) +
+				   MCDI_QWORD(outbuf,
+					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION1_SIZE) - 1;
+		res[dev_params->res_count].flags = IORESOURCE_MEM;
+		dev_params->res_count++;
+	}
+
+	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) != 0) {
+		res[dev_params->res_count].start =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE);
+		res[dev_params->res_count].end =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_BASE) +
+				   MCDI_QWORD(outbuf,
+					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION2_SIZE) - 1;
+		res[dev_params->res_count].flags = IORESOURCE_MEM;
+		dev_params->res_count++;
+	}
+
+	if (MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) != 0) {
+		res[dev_params->res_count].start =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE);
+		res[dev_params->res_count].end =
+			MCDI_QWORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_BASE) +
+				   MCDI_QWORD(outbuf,
+					      CDX_BUS_GET_DEVICE_CONFIG_OUT_MMIO_REGION3_SIZE) - 1;
+		res[dev_params->res_count].flags = IORESOURCE_MEM;
+		dev_params->res_count++;
+	}
+
+	dev_params->vendor = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_VENDOR_ID);
+	dev_params->device = MCDI_WORD(outbuf, CDX_BUS_GET_DEVICE_CONFIG_OUT_DEVICE_ID);
+
+	return 0;
+}
+
+int cdx_mcdi_reset_device(struct cdx_mcdi *cdx, u8 bus_num, u8 dev_num)
+{
+	MCDI_DECLARE_BUF(inbuf, MC_CMD_CDX_DEVICE_RESET_IN_LEN);
+	int ret;
+
+	MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_BUS, bus_num);
+	MCDI_SET_DWORD(inbuf, CDX_DEVICE_RESET_IN_DEVICE, dev_num);
+
+	ret = cdx_mcdi_rpc(cdx, MC_CMD_CDX_DEVICE_RESET, inbuf, sizeof(inbuf),
+			   NULL, 0, NULL);
+
+	return ret;
+}
--- a/drivers/cdx/controller/mcdi_functions.h
+++ b/drivers/cdx/controller/mcdi_functions.h
@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Header file for MCDI FW interaction for CDX bus.
+ *
+ * Copyright (C) 2022-2023, Advanced Micro Devices, Inc.
+ */
+
+#ifndef CDX_MCDI_FUNCTIONS_H
+#define CDX_MCDI_FUNCTIONS_H
+
+#include "mcdi.h"
+#include "../cdx.h"
+
+/**
+ * cdx_mcdi_get_num_buses - Get the total number of buses on
+ *	the controller.
+ * @cdx: pointer to MCDI interface.
+ *
+ * Return: total number of buses available on the controller,
+ *	<0 on failure
+ */
+int cdx_mcdi_get_num_buses(struct cdx_mcdi *cdx);
+
+/**
+ * cdx_mcdi_get_num_devs - Get the total number of devices on
+ *	a particular bus of the controller.
+ * @cdx: pointer to MCDI interface.
+ * @bus_num: Bus number.
+ *
+ * Return: total number of devices available on the bus, <0 on failure
+ */
+int cdx_mcdi_get_num_devs(struct cdx_mcdi *cdx, int bus_num);
+
+/**
+ * cdx_mcdi_get_dev_config - Get configuration for a particular
+ *	bus_num:dev_num
+ * @cdx: pointer to MCDI interface.
+ * @bus_num: Bus number.
+ * @dev_num: Device number.
+ * @dev_params: Pointer to cdx_dev_params, this is populated by this
+ *	device with the configuration corresponding to the provided
+ *	bus_num:dev_num.
+ *
+ * Return: 0 total number of devices available on the bus, <0 on failure
+ */
+int cdx_mcdi_get_dev_config(struct cdx_mcdi *cdx,
+			    u8 bus_num, u8 dev_num,
+			    struct cdx_dev_params *dev_params);
+
+/**
+ * cdx_mcdi_reset_device - Reset cdx device represented by bus_num:dev_num
+ * @cdx: pointer to MCDI interface.
+ * @bus_num: Bus number.
+ * @dev_num: Device number.
+ *
+ * Return: 0 on success, <0 on failure
+ */
+int cdx_mcdi_reset_device(struct cdx_mcdi *cdx,
+			  u8 bus_num, u8 dev_num);
+
+#endif /* CDX_MCDI_FUNCTIONS_H */
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@ -247,8 +247,6 @@ config SONYPI
 	  To compile this driver as a module, choose M here: the
 	  module will be called sonypi.

-source "drivers/char/pcmcia/Kconfig"
-
 config MWAVE
 	tristate "ACP Modem (Mwave) support"
 	depends on X86 && TTY
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@ -35,7 +35,6 @@ obj-$(CONFIG_TELCLOCK)		+= tlclk.o

 obj-$(CONFIG_MWAVE)		+= mwave/
 obj-y				+= agp/
-obj-$(CONFIG_PCMCIA)		+= pcmcia/

 obj-$(CONFIG_HANGCHECK_TIMER)	+= hangcheck-timer.o
 obj-$(CONFIG_TCG_TPM)		+= tpm/
--- a/drivers/char/pcmcia/Kconfig
+++ b/drivers/char/pcmcia/Kconfig
@ -1,68 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# PCMCIA character device configuration
-#
-
-menu "PCMCIA character devices"
-	depends on PCMCIA!=n
-
-config SYNCLINK_CS
-	tristate "SyncLink PC Card support"
-	depends on PCMCIA && TTY
-	help
-	  Enable support for the SyncLink PC Card serial adapter, running
-	  asynchronous and HDLC communications up to 512Kbps. The port is
-	  selectable for RS-232, V.35, RS-449, RS-530, and X.21
-
-	  This driver may be built as a module ( = code which can be
-	  inserted in and removed from the running kernel whenever you want).
-	  The module will be called synclink_cs.  If you want to do that, say M
-	  here.
-
-config CARDMAN_4000
-	tristate "Omnikey Cardman 4000 support"
-	depends on PCMCIA
-	select BITREVERSE
-	help
-	  Enable support for the Omnikey Cardman 4000 PCMCIA Smartcard
-	  reader.
-
-	  This kernel driver requires additional userspace support, either
-	  by the vendor-provided PC/SC ifd_handler (http://www.omnikey.com/),
-	  or via the cm4000 backend of OpenCT (http://www.opensc-project.org/opensc).
-
-config CARDMAN_4040
-	tristate "Omnikey CardMan 4040 support"
-	depends on PCMCIA
-	help
-	  Enable support for the Omnikey CardMan 4040 PCMCIA Smartcard
-	  reader.
-
-	  This card is basically a USB CCID device connected to a FIFO
-	  in I/O space.  To use the kernel driver, you will need either the
-	  PC/SC ifdhandler provided from the Omnikey homepage
-	  (http://www.omnikey.com/), or a current development version of OpenCT
-	  (http://www.opensc-project.org/opensc).
-
-config SCR24X
-	tristate "SCR24x Chip Card Interface support"
-	depends on PCMCIA
-	help
-	  Enable support for the SCR24x PCMCIA Chip Card Interface.
-
-	  To compile this driver as a module, choose M here.
-	  The module will be called scr24x_cs..
-
-	  If unsure say N.
-
-config IPWIRELESS
-	tristate "IPWireless 3G UMTS PCMCIA card support"
-	depends on PCMCIA && NETDEVICES && TTY
-	select PPP
-	help
-	  This is a driver for 3G UMTS PCMCIA card from IPWireless company. In
-	  some countries (for example Czech Republic, T-Mobile ISP) this card
-	  is shipped for service called UMTS 4G.
-
-endmenu
-
--- a/drivers/char/pcmcia/Makefile
+++ b/drivers/char/pcmcia/Makefile
@ -1,11 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-only
-#
-# drivers/char/pcmcia/Makefile
-#
-# Makefile for the Linux PCMCIA char device drivers.
-#
-
-obj-$(CONFIG_SYNCLINK_CS) += synclink_cs.o
-obj-$(CONFIG_CARDMAN_4000) += cm4000_cs.o
-obj-$(CONFIG_CARDMAN_4040) += cm4040_cs.o
-obj-$(CONFIG_SCR24X) += scr24x_cs.o
--- a/drivers/char/pcmcia/cm4000_cs.c
+++ b/drivers/char/pcmcia/cm4000_cs.c
--- a/drivers/char/pcmcia/cm4040_cs.c
+++ b/drivers/char/pcmcia/cm4040_cs.c
@ -1,684 +0,0 @@
-/*
- * A driver for the Omnikey PCMCIA smartcard reader CardMan 4040
- *
- * (c) 2000-2004 Omnikey AG (http://www.omnikey.com/)
- *
- * (C) 2005-2006 Harald Welte <laforge@gnumonks.org>
- * 	- add support for poll()
- * 	- driver cleanup
- * 	- add waitqueues
- * 	- adhere to linux kernel coding style and policies
- * 	- support 2.6.13 "new style" pcmcia interface
- * 	- add class interface for udev device creation
- *
- * The device basically is a USB CCID compliant device that has been
- * attached to an I/O-Mapped FIFO.
- *
- * All rights reserved, Dual BSD/GPL Licensed.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <linux/poll.h>
-#include <linux/mutex.h>
-#include <linux/wait.h>
-#include <linux/uaccess.h>
-#include <asm/io.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/cisreg.h>
-#include <pcmcia/ciscode.h>
-#include <pcmcia/ds.h>
-
-#include "cm4040_cs.h"
-
-
-#define reader_to_dev(x)	(&x->p_dev->dev)
-
-/* n (debug level) is ignored */
-/* additional debug output may be enabled by re-compiling with
- * CM4040_DEBUG set */
-/* #define CM4040_DEBUG */
-#define DEBUGP(n, rdr, x, args...) do { 		\
-		dev_dbg(reader_to_dev(rdr), "%s:" x, 	\
-			   __func__ , ## args);		\
-	} while (0)
-
-static DEFINE_MUTEX(cm4040_mutex);
-
-#define	CCID_DRIVER_BULK_DEFAULT_TIMEOUT  	(150*HZ)
-#define	CCID_DRIVER_ASYNC_POWERUP_TIMEOUT 	(35*HZ)
-#define	CCID_DRIVER_MINIMUM_TIMEOUT 		(3*HZ)
-#define READ_WRITE_BUFFER_SIZE 512
-#define POLL_LOOP_COUNT				1000
-
-/* how often to poll for fifo status change */
-#define POLL_PERIOD 				msecs_to_jiffies(10)
-
-static void reader_release(struct pcmcia_device *link);
-
-static int major;
-static struct class *cmx_class;
-
-#define		BS_READABLE	0x01
-#define		BS_WRITABLE	0x02
-
-struct reader_dev {
-	struct pcmcia_device	*p_dev;
-	wait_queue_head_t	devq;
-	wait_queue_head_t	poll_wait;
-	wait_queue_head_t	read_wait;
-	wait_queue_head_t	write_wait;
-	unsigned long 	  	buffer_status;
-	unsigned long     	timeout;
-	unsigned char     	s_buf[READ_WRITE_BUFFER_SIZE];
-	unsigned char     	r_buf[READ_WRITE_BUFFER_SIZE];
-	struct timer_list 	poll_timer;
-};
-
-static struct pcmcia_device *dev_table[CM_MAX_DEV];
-
-#ifndef CM4040_DEBUG
-#define	xoutb	outb
-#define	xinb	inb
-#else
-static inline void xoutb(unsigned char val, unsigned short port)
-{
-	pr_debug("outb(val=%.2x,port=%.4x)\n", val, port);
-	outb(val, port);
-}
-
-static inline unsigned char xinb(unsigned short port)
-{
-	unsigned char val;
-
-	val = inb(port);
-	pr_debug("%.2x=inb(%.4x)\n", val, port);
-	return val;
-}
-#endif
-
-/* poll the device fifo status register.  not to be confused with
- * the poll syscall. */
-static void cm4040_do_poll(struct timer_list *t)
-{
-	struct reader_dev *dev = from_timer(dev, t, poll_timer);
-	unsigned int obs = xinb(dev->p_dev->resource[0]->start
-				+ REG_OFFSET_BUFFER_STATUS);
-
-	if ((obs & BSR_BULK_IN_FULL)) {
-		set_bit(BS_READABLE, &dev->buffer_status);
-		DEBUGP(4, dev, "waking up read_wait\n");
-		wake_up_interruptible(&dev->read_wait);
-	} else
-		clear_bit(BS_READABLE, &dev->buffer_status);
-
-	if (!(obs & BSR_BULK_OUT_FULL)) {
-		set_bit(BS_WRITABLE, &dev->buffer_status);
-		DEBUGP(4, dev, "waking up write_wait\n");
-		wake_up_interruptible(&dev->write_wait);
-	} else
-		clear_bit(BS_WRITABLE, &dev->buffer_status);
-
-	if (dev->buffer_status)
-		wake_up_interruptible(&dev->poll_wait);
-
-	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
-}
-
-static void cm4040_stop_poll(struct reader_dev *dev)
-{
-	del_timer_sync(&dev->poll_timer);
-}
-
-static int wait_for_bulk_out_ready(struct reader_dev *dev)
-{
-	int i, rc;
-	int iobase = dev->p_dev->resource[0]->start;
-
-	for (i = 0; i < POLL_LOOP_COUNT; i++) {
-		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
-		    & BSR_BULK_OUT_FULL) == 0) {
-			DEBUGP(4, dev, "BulkOut empty (i=%d)\n", i);
-			return 1;
-		}
-	}
-
-	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
-		dev->timeout);
-	rc = wait_event_interruptible_timeout(dev->write_wait,
-					      test_and_clear_bit(BS_WRITABLE,
-						       &dev->buffer_status),
-					      dev->timeout);
-
-	if (rc > 0)
-		DEBUGP(4, dev, "woke up: BulkOut empty\n");
-	else if (rc == 0)
-		DEBUGP(4, dev, "woke up: BulkOut full, returning 0 :(\n");
-	else if (rc < 0)
-		DEBUGP(4, dev, "woke up: signal arrived\n");
-
-	return rc;
-}
-
-/* Write to Sync Control Register */
-static int write_sync_reg(unsigned char val, struct reader_dev *dev)
-{
-	int iobase = dev->p_dev->resource[0]->start;
-	int rc;
-
-	rc = wait_for_bulk_out_ready(dev);
-	if (rc <= 0)
-		return rc;
-
-	xoutb(val, iobase + REG_OFFSET_SYNC_CONTROL);
-	rc = wait_for_bulk_out_ready(dev);
-	if (rc <= 0)
-		return rc;
-
-	return 1;
-}
-
-static int wait_for_bulk_in_ready(struct reader_dev *dev)
-{
-	int i, rc;
-	int iobase = dev->p_dev->resource[0]->start;
-
-	for (i = 0; i < POLL_LOOP_COUNT; i++) {
-		if ((xinb(iobase + REG_OFFSET_BUFFER_STATUS)
-		    & BSR_BULK_IN_FULL) == BSR_BULK_IN_FULL) {
-			DEBUGP(3, dev, "BulkIn full (i=%d)\n", i);
-			return 1;
-		}
-	}
-
-	DEBUGP(4, dev, "wait_event_interruptible_timeout(timeout=%ld\n",
-		dev->timeout);
-	rc = wait_event_interruptible_timeout(dev->read_wait,
-					      test_and_clear_bit(BS_READABLE,
-						 	&dev->buffer_status),
-					      dev->timeout);
-	if (rc > 0)
-		DEBUGP(4, dev, "woke up: BulkIn full\n");
-	else if (rc == 0)
-		DEBUGP(4, dev, "woke up: BulkIn not full, returning 0 :(\n");
-	else if (rc < 0)
-		DEBUGP(4, dev, "woke up: signal arrived\n");
-
-	return rc;
-}
-
-static ssize_t cm4040_read(struct file *filp, char __user *buf,
-			size_t count, loff_t *ppos)
-{
-	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->p_dev->resource[0]->start;
-	size_t bytes_to_read;
-	unsigned long i;
-	size_t min_bytes_to_read;
-	int rc;
-
-	DEBUGP(2, dev, "-> cm4040_read(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0)
-		return 0;
-
-	if (count < 10)
-		return -EFAULT;
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		DEBUGP(2, dev, "<- cm4040_read (failure)\n");
-		return -EAGAIN;
-	}
-
-	if (!pcmcia_dev_present(dev->p_dev))
-		return -ENODEV;
-
-	for (i = 0; i < 5; i++) {
-		rc = wait_for_bulk_in_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			return -EIO;
-		}
-	  	dev->r_buf[i] = xinb(iobase + REG_OFFSET_BULK_IN);
-#ifdef CM4040_DEBUG
-		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
-	}
-	pr_debug("\n");
-#else
-	}
-#endif
-
-	bytes_to_read = 5 + le32_to_cpu(*(__le32 *)&dev->r_buf[1]);
-
-	DEBUGP(6, dev, "BytesToRead=%zu\n", bytes_to_read);
-
-	min_bytes_to_read = min(count, bytes_to_read + 5);
-	min_bytes_to_read = min_t(size_t, min_bytes_to_read, READ_WRITE_BUFFER_SIZE);
-
-	DEBUGP(6, dev, "Min=%zu\n", min_bytes_to_read);
-
-	for (i = 0; i < (min_bytes_to_read-5); i++) {
-		rc = wait_for_bulk_in_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-			DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			return -EIO;
-		}
-		dev->r_buf[i+5] = xinb(iobase + REG_OFFSET_BULK_IN);
-#ifdef CM4040_DEBUG
-		pr_debug("%lu:%2x ", i, dev->r_buf[i]);
-	}
-	pr_debug("\n");
-#else
-	}
-#endif
-
-	*ppos = min_bytes_to_read;
-	if (copy_to_user(buf, dev->r_buf, min_bytes_to_read))
-		return -EFAULT;
-
-	rc = wait_for_bulk_in_ready(dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "wait_for_bulk_in_ready rc=%.2x\n", rc);
-		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		return -EIO;
-	}
-
-	rc = write_sync_reg(SCR_READER_TO_HOST_DONE, dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2x\n", rc);
-		DEBUGP(2, dev, "<- cm4040_read (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	xinb(iobase + REG_OFFSET_BULK_IN);
-
-	DEBUGP(2, dev, "<- cm4040_read (successfully)\n");
-	return min_bytes_to_read;
-}
-
-static ssize_t cm4040_write(struct file *filp, const char __user *buf,
-			 size_t count, loff_t *ppos)
-{
-	struct reader_dev *dev = filp->private_data;
-	int iobase = dev->p_dev->resource[0]->start;
-	ssize_t rc;
-	int i;
-	unsigned int bytes_to_write;
-
-	DEBUGP(2, dev, "-> cm4040_write(%s,%d)\n", current->comm, current->pid);
-
-	if (count == 0) {
-		DEBUGP(2, dev, "<- cm4040_write empty read (successfully)\n");
-		return 0;
-	}
-
-	if ((count < 5) || (count > READ_WRITE_BUFFER_SIZE)) {
-		DEBUGP(2, dev, "<- cm4040_write buffersize=%zd < 5\n", count);
-		return -EIO;
-	}
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		DEBUGP(4, dev, "<- cm4040_write (failure)\n");
-		return -EAGAIN;
-	}
-
-	if (!pcmcia_dev_present(dev->p_dev))
-		return -ENODEV;
-
-	bytes_to_write = count;
-	if (copy_from_user(dev->s_buf, buf, bytes_to_write))
-		return -EFAULT;
-
-	switch (dev->s_buf[0]) {
-		case CMD_PC_TO_RDR_XFRBLOCK:
-		case CMD_PC_TO_RDR_SECURE:
-		case CMD_PC_TO_RDR_TEST_SECURE:
-		case CMD_PC_TO_RDR_OK_SECURE:
-			dev->timeout = CCID_DRIVER_BULK_DEFAULT_TIMEOUT;
-			break;
-
-		case CMD_PC_TO_RDR_ICCPOWERON:
-			dev->timeout = CCID_DRIVER_ASYNC_POWERUP_TIMEOUT;
-			break;
-
-		case CMD_PC_TO_RDR_GETSLOTSTATUS:
-		case CMD_PC_TO_RDR_ICCPOWEROFF:
-		case CMD_PC_TO_RDR_GETPARAMETERS:
-		case CMD_PC_TO_RDR_RESETPARAMETERS:
-		case CMD_PC_TO_RDR_SETPARAMETERS:
-		case CMD_PC_TO_RDR_ESCAPE:
-		case CMD_PC_TO_RDR_ICCCLOCK:
-		default:
-			dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
-			break;
-	}
-
-	rc = write_sync_reg(SCR_HOST_TO_READER_START, dev);
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
-		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	DEBUGP(4, dev, "start \n");
-
-	for (i = 0; i < bytes_to_write; i++) {
-		rc = wait_for_bulk_out_ready(dev);
-		if (rc <= 0) {
-			DEBUGP(5, dev, "wait_for_bulk_out_ready rc=%.2zx\n",
-			       rc);
-			DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-			if (rc == -ERESTARTSYS)
-				return rc;
-			else
-				return -EIO;
-		}
-
-		xoutb(dev->s_buf[i],iobase + REG_OFFSET_BULK_OUT);
-	}
-	DEBUGP(4, dev, "end\n");
-
-	rc = write_sync_reg(SCR_HOST_TO_READER_DONE, dev);
-
-	if (rc <= 0) {
-		DEBUGP(5, dev, "write_sync_reg c=%.2zx\n", rc);
-		DEBUGP(2, dev, "<- cm4040_write (failed)\n");
-		if (rc == -ERESTARTSYS)
-			return rc;
-		else
-			return -EIO;
-	}
-
-	DEBUGP(2, dev, "<- cm4040_write (successfully)\n");
-	return count;
-}
-
-static __poll_t cm4040_poll(struct file *filp, poll_table *wait)
-{
-	struct reader_dev *dev = filp->private_data;
-	__poll_t mask = 0;
-
-	poll_wait(filp, &dev->poll_wait, wait);
-
-	if (test_and_clear_bit(BS_READABLE, &dev->buffer_status))
-		mask |= EPOLLIN | EPOLLRDNORM;
-	if (test_and_clear_bit(BS_WRITABLE, &dev->buffer_status))
-		mask |= EPOLLOUT | EPOLLWRNORM;
-
-	DEBUGP(2, dev, "<- cm4040_poll(%u)\n", mask);
-
-	return mask;
-}
-
-static int cm4040_open(struct inode *inode, struct file *filp)
-{
-	struct reader_dev *dev;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-	int ret;
-
-	if (minor >= CM_MAX_DEV)
-		return -ENODEV;
-
-	mutex_lock(&cm4040_mutex);
-	link = dev_table[minor];
-	if (link == NULL || !pcmcia_dev_present(link)) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	if (link->open) {
-		ret = -EBUSY;
-		goto out;
-	}
-
-	dev = link->priv;
-	filp->private_data = dev;
-
-	if (filp->f_flags & O_NONBLOCK) {
-		DEBUGP(4, dev, "filep->f_flags O_NONBLOCK set\n");
-		ret = -EAGAIN;
-		goto out;
-	}
-
-	link->open = 1;
-
-	mod_timer(&dev->poll_timer, jiffies + POLL_PERIOD);
-
-	DEBUGP(2, dev, "<- cm4040_open (successfully)\n");
-	ret = nonseekable_open(inode, filp);
-out:
-	mutex_unlock(&cm4040_mutex);
-	return ret;
-}
-
-static int cm4040_close(struct inode *inode, struct file *filp)
-{
-	struct reader_dev *dev = filp->private_data;
-	struct pcmcia_device *link;
-	int minor = iminor(inode);
-
-	DEBUGP(2, dev, "-> cm4040_close(maj/min=%d.%d)\n", imajor(inode),
-	      iminor(inode));
-
-	if (minor >= CM_MAX_DEV)
-		return -ENODEV;
-
-	link = dev_table[minor];
-	if (link == NULL)
-		return -ENODEV;
-
-	cm4040_stop_poll(dev);
-
-	link->open = 0;
-	wake_up(&dev->devq);
-
-	DEBUGP(2, dev, "<- cm4040_close\n");
-	return 0;
-}
-
-static void cm4040_reader_release(struct pcmcia_device *link)
-{
-	struct reader_dev *dev = link->priv;
-
-	DEBUGP(3, dev, "-> cm4040_reader_release\n");
-	while (link->open) {
-		DEBUGP(3, dev, MODULE_NAME ": delaying release "
-		       "until process has terminated\n");
- 		wait_event(dev->devq, (link->open == 0));
-	}
-	DEBUGP(3, dev, "<- cm4040_reader_release\n");
-	return;
-}
-
-static int cm4040_config_check(struct pcmcia_device *p_dev, void *priv_data)
-{
-	return pcmcia_request_io(p_dev);
-}
-
-
-static int reader_config(struct pcmcia_device *link, int devno)
-{
-	struct reader_dev *dev;
-	int fail_rc;
-
-	link->config_flags |= CONF_AUTO_SET_IO;
-
-	if (pcmcia_loop_config(link, cm4040_config_check, NULL))
-		goto cs_release;
-
-	fail_rc = pcmcia_enable_device(link);
-	if (fail_rc != 0) {
-		dev_info(&link->dev, "pcmcia_enable_device failed 0x%x\n",
-			 fail_rc);
-		goto cs_release;
-	}
-
-	dev = link->priv;
-
-	DEBUGP(2, dev, "device " DEVICE_NAME "%d at %pR\n", devno,
-	      link->resource[0]);
-	DEBUGP(2, dev, "<- reader_config (succ)\n");
-
-	return 0;
-
-cs_release:
-	reader_release(link);
-	return -ENODEV;
-}
-
-static void reader_release(struct pcmcia_device *link)
-{
-	cm4040_reader_release(link);
-	pcmcia_disable_device(link);
-}
-
-static int reader_probe(struct pcmcia_device *link)
-{
-	struct reader_dev *dev;
-	int i, ret;
-
-	for (i = 0; i < CM_MAX_DEV; i++) {
-		if (dev_table[i] == NULL)
-			break;
-	}
-
-	if (i == CM_MAX_DEV)
-		return -ENODEV;
-
-	dev = kzalloc(sizeof(struct reader_dev), GFP_KERNEL);
-	if (dev == NULL)
-		return -ENOMEM;
-
-	dev->timeout = CCID_DRIVER_MINIMUM_TIMEOUT;
-	dev->buffer_status = 0;
-
-	link->priv = dev;
-	dev->p_dev = link;
-
-	dev_table[i] = link;
-
-	init_waitqueue_head(&dev->devq);
-	init_waitqueue_head(&dev->poll_wait);
-	init_waitqueue_head(&dev->read_wait);
-	init_waitqueue_head(&dev->write_wait);
-	timer_setup(&dev->poll_timer, cm4040_do_poll, 0);
-
-	ret = reader_config(link, i);
-	if (ret) {
-		dev_table[i] = NULL;
-		kfree(dev);
-		return ret;
-	}
-
-	device_create(cmx_class, NULL, MKDEV(major, i), NULL, "cmx%d", i);
-
-	return 0;
-}
-
-static void reader_detach(struct pcmcia_device *link)
-{
-	struct reader_dev *dev = link->priv;
-	int devno;
-
-	/* find device */
-	for (devno = 0; devno < CM_MAX_DEV; devno++) {
-		if (dev_table[devno] == link)
-			break;
-	}
-	if (devno == CM_MAX_DEV)
-		return;
-
-	reader_release(link);
-
-	dev_table[devno] = NULL;
-	kfree(dev);
-
-	device_destroy(cmx_class, MKDEV(major, devno));
-
-	return;
-}
-
-static const struct file_operations reader_fops = {
-	.owner		= THIS_MODULE,
-	.read		= cm4040_read,
-	.write		= cm4040_write,
-	.open		= cm4040_open,
-	.release	= cm4040_close,
-	.poll		= cm4040_poll,
-	.llseek		= no_llseek,
-};
-
-static const struct pcmcia_device_id cm4040_ids[] = {
-	PCMCIA_DEVICE_MANF_CARD(0x0223, 0x0200),
-	PCMCIA_DEVICE_PROD_ID12("OMNIKEY", "CardMan 4040",
-				0xE32CDD8C, 0x8F23318B),
-	PCMCIA_DEVICE_NULL,
-};
-MODULE_DEVICE_TABLE(pcmcia, cm4040_ids);
-
-static struct pcmcia_driver reader_driver = {
-  	.owner		= THIS_MODULE,
-	.name		= "cm4040_cs",
-	.probe		= reader_probe,
-	.remove		= reader_detach,
-	.id_table	= cm4040_ids,
-};
-
-static int __init cm4040_init(void)
-{
-	int rc;
-
-	cmx_class = class_create("cardman_4040");
-	if (IS_ERR(cmx_class))
-		return PTR_ERR(cmx_class);
-
-	major = register_chrdev(0, DEVICE_NAME, &reader_fops);
-	if (major < 0) {
-		printk(KERN_WARNING MODULE_NAME
-			": could not get major number\n");
-		class_destroy(cmx_class);
-		return major;
-	}
-
-	rc = pcmcia_register_driver(&reader_driver);
-	if (rc < 0) {
-		unregister_chrdev(major, DEVICE_NAME);
-		class_destroy(cmx_class);
-		return rc;
-	}
-
-	return 0;
-}
-
-static void __exit cm4040_exit(void)
-{
-	pcmcia_unregister_driver(&reader_driver);
-	unregister_chrdev(major, DEVICE_NAME);
-	class_destroy(cmx_class);
-}
-
-module_init(cm4040_init);
-module_exit(cm4040_exit);
-MODULE_LICENSE("Dual BSD/GPL");
--- a/drivers/char/pcmcia/cm4040_cs.h
+++ b/drivers/char/pcmcia/cm4040_cs.h
@ -1,48 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef	_CM4040_H_
-#define	_CM4040_H_
-
-#define	CM_MAX_DEV		4
-
-#define	DEVICE_NAME		"cmx"
-#define	MODULE_NAME		"cm4040_cs"
-
-#define REG_OFFSET_BULK_OUT      0
-#define REG_OFFSET_BULK_IN       0
-#define REG_OFFSET_BUFFER_STATUS 1
-#define REG_OFFSET_SYNC_CONTROL  2
-
-#define BSR_BULK_IN_FULL  0x02
-#define BSR_BULK_OUT_FULL 0x01
-
-#define SCR_HOST_TO_READER_START 0x80
-#define SCR_ABORT                0x40
-#define SCR_EN_NOTIFY            0x20
-#define SCR_ACK_NOTIFY           0x10
-#define SCR_READER_TO_HOST_DONE  0x08
-#define SCR_HOST_TO_READER_DONE  0x04
-#define SCR_PULSE_INTERRUPT      0x02
-#define SCR_POWER_DOWN           0x01
-
-
-#define  CMD_PC_TO_RDR_ICCPOWERON       0x62
-#define  CMD_PC_TO_RDR_GETSLOTSTATUS    0x65
-#define  CMD_PC_TO_RDR_ICCPOWEROFF      0x63
-#define  CMD_PC_TO_RDR_SECURE           0x69
-#define  CMD_PC_TO_RDR_GETPARAMETERS    0x6C
-#define  CMD_PC_TO_RDR_RESETPARAMETERS  0x6D
-#define  CMD_PC_TO_RDR_SETPARAMETERS    0x61
-#define  CMD_PC_TO_RDR_XFRBLOCK         0x6F
-#define  CMD_PC_TO_RDR_ESCAPE           0x6B
-#define  CMD_PC_TO_RDR_ICCCLOCK         0x6E
-#define  CMD_PC_TO_RDR_TEST_SECURE      0x74
-#define  CMD_PC_TO_RDR_OK_SECURE        0x89
-
-
-#define  CMD_RDR_TO_PC_SLOTSTATUS         0x81
-#define  CMD_RDR_TO_PC_DATABLOCK          0x80
-#define  CMD_RDR_TO_PC_PARAMETERS         0x82
-#define  CMD_RDR_TO_PC_ESCAPE             0x83
-#define  CMD_RDR_TO_PC_OK_SECURE          0x89
-
-#endif	/* _CM4040_H_ */
--- a/drivers/char/pcmcia/scr24x_cs.c
+++ b/drivers/char/pcmcia/scr24x_cs.c
@ -1,359 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * SCR24x PCMCIA Smart Card Reader Driver
- *
- * Copyright (C) 2005-2006 TL Sudheendran
- * Copyright (C) 2016 Lubomir Rintel
- *
- * Derived from "scr24x_v4.2.6_Release.tar.gz" driver by TL Sudheendran.
- */
-
-#include <linux/device.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/cdev.h>
-#include <linux/slab.h>
-#include <linux/fs.h>
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#include <pcmcia/cistpl.h>
-#include <pcmcia/ds.h>
-
-#define CCID_HEADER_SIZE	10
-#define CCID_LENGTH_OFFSET	1
-#define CCID_MAX_LEN		271
-
-#define SCR24X_DATA(n)		(1 + n)
-#define SCR24X_CMD_STATUS	7
-#define CMD_START		0x40
-#define CMD_WRITE_BYTE		0x41
-#define CMD_READ_BYTE		0x42
-#define STATUS_BUSY		0x80
-
-struct scr24x_dev {
-	struct device *dev;
-	struct cdev c_dev;
-	unsigned char buf[CCID_MAX_LEN];
-	int devno;
-	struct mutex lock;
-	struct kref refcnt;
-	u8 __iomem *regs;
-};
-
-#define SCR24X_DEVS 8
-static DECLARE_BITMAP(scr24x_minors, SCR24X_DEVS);
-
-static struct class *scr24x_class;
-static dev_t scr24x_devt;
-
-static void scr24x_delete(struct kref *kref)
-{
-	struct scr24x_dev *dev = container_of(kref, struct scr24x_dev,
-								refcnt);
-
-	kfree(dev);
-}
-
-static int scr24x_wait_ready(struct scr24x_dev *dev)
-{
-	u_char status;
-	int timeout = 100;
-
-	do {
-		status = ioread8(dev->regs + SCR24X_CMD_STATUS);
-		if (!(status & STATUS_BUSY))
-			return 0;
-
-		msleep(20);
-	} while (--timeout);
-
-	return -EIO;
-}
-
-static int scr24x_open(struct inode *inode, struct file *filp)
-{
-	struct scr24x_dev *dev = container_of(inode->i_cdev,
-				struct scr24x_dev, c_dev);
-
-	kref_get(&dev->refcnt);
-	filp->private_data = dev;
-
-	return stream_open(inode, filp);
-}
-
-static int scr24x_release(struct inode *inode, struct file *filp)
-{
-	struct scr24x_dev *dev = filp->private_data;
-
-	/* We must not take the dev->lock here as scr24x_delete()
-	 * might be called to remove the dev structure altogether.
-	 * We don't need the lock anyway, since after the reference
-	 * acquired in probe() is released in remove() the chrdev
-	 * is already unregistered and noone can possibly acquire
-	 * a reference via open() anymore. */
-	kref_put(&dev->refcnt, scr24x_delete);
-	return 0;
-}
-
-static int read_chunk(struct scr24x_dev *dev, size_t offset, size_t limit)
-{
-	size_t i, y;
-	int ret;
-
-	for (i = offset; i < limit; i += 5) {
-		iowrite8(CMD_READ_BYTE, dev->regs + SCR24X_CMD_STATUS);
-		ret = scr24x_wait_ready(dev);
-		if (ret < 0)
-			return ret;
-
-		for (y = 0; y < 5 && i + y < limit; y++)
-			dev->buf[i + y] = ioread8(dev->regs + SCR24X_DATA(y));
-	}
-
-	return 0;
-}
-
-static ssize_t scr24x_read(struct file *filp, char __user *buf, size_t count,
-								loff_t *ppos)
-{
-	struct scr24x_dev *dev = filp->private_data;
-	int ret;
-	int len;
-
-	if (count < CCID_HEADER_SIZE)
-		return -EINVAL;
-
-	if (mutex_lock_interruptible(&dev->lock))
-		return -ERESTARTSYS;
-
-	if (!dev->dev) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-	len = CCID_HEADER_SIZE;
-	ret = read_chunk(dev, 0, len);
-	if (ret < 0)
-		goto out;
-
-	len += le32_to_cpu(*(__le32 *)(&dev->buf[CCID_LENGTH_OFFSET]));
-	if (len > sizeof(dev->buf)) {
-		ret = -EIO;
-		goto out;
-	}
-	ret = read_chunk(dev, CCID_HEADER_SIZE, len);
-	if (ret < 0)
-		goto out;
-
-	if (len < count)
-		count = len;
-
-	if (copy_to_user(buf, dev->buf, count)) {
-		ret = -EFAULT;
-		goto out;
-	}
-
-	ret = count;
-out:
-	mutex_unlock(&dev->lock);
-	return ret;
-}
-
-static ssize_t scr24x_write(struct file *filp, const char __user *buf,
-					size_t count, loff_t *ppos)
-{
-	struct scr24x_dev *dev = filp->private_data;
-	size_t i, y;
-	int ret;
-
-	if (mutex_lock_interruptible(&dev->lock))
-		return -ERESTARTSYS;
-
-	if (!dev->dev) {
-		ret = -ENODEV;
-		goto out;
-	}
-
-	if (count > sizeof(dev->buf)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	if (copy_from_user(dev->buf, buf, count)) {
-		ret = -EFAULT;
-		goto out;
-	}
-
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-
-	iowrite8(CMD_START, dev->regs + SCR24X_CMD_STATUS);
-	ret = scr24x_wait_ready(dev);
-	if (ret < 0)
-		goto out;
-
-	for (i = 0; i < count; i += 5) {
-		for (y = 0; y < 5 && i + y < count; y++)
-			iowrite8(dev->buf[i + y], dev->regs + SCR24X_DATA(y));
-
-		iowrite8(CMD_WRITE_BYTE, dev->regs + SCR24X_CMD_STATUS);
-		ret = scr24x_wait_ready(dev);
-		if (ret < 0)
-			goto out;
-	}
-
-	ret = count;
-out:
-	mutex_unlock(&dev->lock);
-	return ret;
-}
-
-static const struct file_operations scr24x_fops = {
-	.owner		= THIS_MODULE,
-	.read		= scr24x_read,
-	.write		= scr24x_write,
-	.open		= scr24x_open,
-	.release	= scr24x_release,
-	.llseek		= no_llseek,
-};
-
-static int scr24x_config_check(struct pcmcia_device *link, void *priv_data)
-{
-	if (resource_size(link->resource[PCMCIA_IOPORT_0]) != 0x11)
-		return -ENODEV;
-	return pcmcia_request_io(link);
-}
-
-static int scr24x_probe(struct pcmcia_device *link)
-{
-	struct scr24x_dev *dev;
-	int ret;
-
-	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
-	if (!dev)
-		return -ENOMEM;
-
-	dev->devno = find_first_zero_bit(scr24x_minors, SCR24X_DEVS);
-	if (dev->devno >= SCR24X_DEVS) {
-		ret = -EBUSY;
-		goto err;
-	}
-
-	mutex_init(&dev->lock);
-	kref_init(&dev->refcnt);
-
-	link->priv = dev;
-	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
-
-	ret = pcmcia_loop_config(link, scr24x_config_check, NULL);
-	if (ret < 0)
-		goto err;
-
-	dev->dev = &link->dev;
-	dev->regs = devm_ioport_map(&link->dev,
-				link->resource[PCMCIA_IOPORT_0]->start,
-				resource_size(link->resource[PCMCIA_IOPORT_0]));
-	if (!dev->regs) {
-		ret = -EIO;
-		goto err;
-	}
-
-	cdev_init(&dev->c_dev, &scr24x_fops);
-	dev->c_dev.owner = THIS_MODULE;
-	ret = cdev_add(&dev->c_dev, MKDEV(MAJOR(scr24x_devt), dev->devno), 1);
-	if (ret < 0)
-		goto err;
-
-	ret = pcmcia_enable_device(link);
-	if (ret < 0) {
-		pcmcia_disable_device(link);
-		goto err;
-	}
-
-	device_create(scr24x_class, NULL, MKDEV(MAJOR(scr24x_devt), dev->devno),
-		      NULL, "scr24x%d", dev->devno);
-
-	dev_info(&link->dev, "SCR24x Chip Card Interface\n");
-	return 0;
-
-err:
-	if (dev->devno < SCR24X_DEVS)
-		clear_bit(dev->devno, scr24x_minors);
-	kfree (dev);
-	return ret;
-}
-
-static void scr24x_remove(struct pcmcia_device *link)
-{
-	struct scr24x_dev *dev = (struct scr24x_dev *)link->priv;
-
-	device_destroy(scr24x_class, MKDEV(MAJOR(scr24x_devt), dev->devno));
-	mutex_lock(&dev->lock);
-	pcmcia_disable_device(link);
-	cdev_del(&dev->c_dev);
-	clear_bit(dev->devno, scr24x_minors);
-	dev->dev = NULL;
-	mutex_unlock(&dev->lock);
-
-	kref_put(&dev->refcnt, scr24x_delete);
-}
-
-static const struct pcmcia_device_id scr24x_ids[] = {
-	PCMCIA_DEVICE_PROD_ID12("HP", "PC Card Smart Card Reader",
-					0x53cb94f9, 0xbfdf89a5),
-	PCMCIA_DEVICE_PROD_ID1("SCR241 PCMCIA", 0x6271efa3),
-	PCMCIA_DEVICE_PROD_ID1("SCR243 PCMCIA", 0x2054e8de),
-	PCMCIA_DEVICE_PROD_ID1("SCR24x PCMCIA", 0x54a33665),
-	PCMCIA_DEVICE_NULL
-};
-MODULE_DEVICE_TABLE(pcmcia, scr24x_ids);
-
-static struct pcmcia_driver scr24x_driver = {
-	.owner		= THIS_MODULE,
-	.name		= "scr24x_cs",
-	.probe		= scr24x_probe,
-	.remove		= scr24x_remove,
-	.id_table	= scr24x_ids,
-};
-
-static int __init scr24x_init(void)
-{
-	int ret;
-
-	scr24x_class = class_create("scr24x");
-	if (IS_ERR(scr24x_class))
-		return PTR_ERR(scr24x_class);
-
-	ret = alloc_chrdev_region(&scr24x_devt, 0, SCR24X_DEVS, "scr24x");
-	if (ret < 0)  {
-		class_destroy(scr24x_class);
-		return ret;
-	}
-
-	ret = pcmcia_register_driver(&scr24x_driver);
-	if (ret < 0) {
-		unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
-		class_destroy(scr24x_class);
-	}
-
-	return ret;
-}
-
-static void __exit scr24x_exit(void)
-{
-	pcmcia_unregister_driver(&scr24x_driver);
-	unregister_chrdev_region(scr24x_devt, SCR24X_DEVS);
-	class_destroy(scr24x_class);
-}
-
-module_init(scr24x_init);
-module_exit(scr24x_exit);
-
-MODULE_AUTHOR("Lubomir Rintel");
-MODULE_DESCRIPTION("SCR24x PCMCIA Smart Card Reader Driver");
-MODULE_LICENSE("GPL");
--- a/drivers/char/pcmcia/synclink_cs.c
+++ b/drivers/char/pcmcia/synclink_cs.c
--- a/drivers/firmware/dmi-sysfs.c
+++ b/drivers/firmware/dmi-sysfs.c
@ -304,7 +304,7 @@ static struct attribute *dmi_sysfs_sel_attrs[] = {
 };
 ATTRIBUTE_GROUPS(dmi_sysfs_sel);

-static struct kobj_type dmi_system_event_log_ktype = {
+static const struct kobj_type dmi_system_event_log_ktype = {
 	.release = dmi_entry_free,
 	.sysfs_ops = &dmi_sysfs_specialize_attr_ops,
 	.default_groups = dmi_sysfs_sel_groups,
@ -563,7 +563,7 @@ static void dmi_sysfs_entry_release(struct kobject *kobj)
 	kfree(entry);
 }

-static struct kobj_type dmi_sysfs_entry_ktype = {
+static const struct kobj_type dmi_sysfs_entry_ktype = {
 	.release = dmi_sysfs_entry_release,
 	.sysfs_ops = &dmi_sysfs_attr_ops,
 	.default_groups = dmi_sysfs_entry_groups,
--- a/drivers/firmware/edd.c
+++ b/drivers/firmware/edd.c
@ -608,7 +608,7 @@ static void edd_release(struct kobject * kobj)
 	kfree(dev);
 }

-static struct kobj_type edd_ktype = {
+static const struct kobj_type edd_ktype = {
 	.release	= edd_release,
 	.sysfs_ops	= &edd_attr_ops,
 };
--- a/drivers/firmware/stratix10-svc.c
+++ b/drivers/firmware/stratix10-svc.c
@ -1133,8 +1133,8 @@ static int stratix10_svc_drv_probe(struct platform_device *pdev)
 		return ret;

 	genpool = svc_create_memory_pool(pdev, sh_memory);
-	if (!genpool)
-		return -ENOMEM;
+	if (IS_ERR(genpool))
+		return PTR_ERR(genpool);

 	/* allocate service controller and supporting channel */
 	controller = devm_kzalloc(dev, sizeof(*controller), GFP_KERNEL);
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@ -971,6 +971,39 @@ int zynqmp_pm_fpga_get_status(u32 *value)
 }
 EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_status);

+/**
+ * zynqmp_pm_fpga_get_config_status - Get the FPGA configuration status.
+ * @value: Buffer to store FPGA configuration status.
+ *
+ * This function provides access to the pmufw to get the FPGA configuration
+ * status
+ *
+ * Return: 0 on success, a negative value on error
+ */
+int zynqmp_pm_fpga_get_config_status(u32 *value)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	u32 buf, lower_addr, upper_addr;
+	int ret;
+
+	if (!value)
+		return -EINVAL;
+
+	lower_addr = lower_32_bits((u64)&buf);
+	upper_addr = upper_32_bits((u64)&buf);
+
+	ret = zynqmp_pm_invoke_fn(PM_FPGA_READ,
+				  XILINX_ZYNQMP_PM_FPGA_CONFIG_STAT_OFFSET,
+				  lower_addr, upper_addr,
+				  XILINX_ZYNQMP_PM_FPGA_READ_CONFIG_REG,
+				  ret_payload);
+
+	*value = ret_payload[1];
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(zynqmp_pm_fpga_get_config_status);
+
 /**
 * zynqmp_pm_pinctrl_request - Request Pin from firmware
 * @pin: Pin number to request
--- a/drivers/fpga/fpga-bridge.c
+++ b/drivers/fpga/fpga-bridge.c
@ -115,7 +115,7 @@ static int fpga_bridge_dev_match(struct device *dev, const void *data)
 /**
 * fpga_bridge_get - get an exclusive reference to an fpga bridge
 * @dev:	parent device that fpga bridge was registered with
- * @info:	fpga manager info
+ * @info:	fpga image specific information
 *
 * Given a device, get an exclusive reference to an fpga bridge.
 *
--- a/drivers/fpga/zynqmp-fpga.c
+++ b/drivers/fpga/zynqmp-fpga.c
@ -77,6 +77,26 @@ static enum fpga_mgr_states zynqmp_fpga_ops_state(struct fpga_manager *mgr)
 	return FPGA_MGR_STATE_UNKNOWN;
 }

+static ssize_t status_show(struct device *dev,
+			   struct device_attribute *attr, char *buf)
+{
+	u32 status;
+	int ret;
+
+	ret = zynqmp_pm_fpga_get_config_status(&status);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "0x%x\n", status);
+}
+static DEVICE_ATTR_RO(status);
+
+static struct attribute *zynqmp_fpga_attrs[] = {
+	&dev_attr_status.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(zynqmp_fpga);
+
 static const struct fpga_manager_ops zynqmp_fpga_ops = {
 	.state = zynqmp_fpga_ops_state,
 	.write_init = zynqmp_fpga_ops_write_init,
@ -113,6 +133,7 @@ static struct platform_driver zynqmp_fpga_driver = {
 	.driver = {
 		.name = "zynqmp_fpga_manager",
 		.of_match_table = of_match_ptr(zynqmp_fpga_of_match),
+		.dev_groups = zynqmp_fpga_groups,
 	},
 };

--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@ -160,7 +160,7 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node)
 	int ret;
 	u32 reg;

-	if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) {
+	if (of_alias_from_compatible(node, info.type, sizeof(info.type)) < 0) {
 		drm_err(host, "modalias failure on %pOF\n", node);
 		return ERR_PTR(-EINVAL);
 	}
--- a/drivers/hsi/hsi_core.c
+++ b/drivers/hsi/hsi_core.c
@ -207,7 +207,7 @@ static void hsi_add_client_from_dt(struct hsi_port *port,
 	if (!cl)
 		return;

-	err = of_modalias_node(client, name, sizeof(name));
+	err = of_alias_from_compatible(client, name, sizeof(name));
 	if (err)
 		goto err;

--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@ -901,6 +901,7 @@ int __init etm_perf_init(void)
 	etm_pmu.addr_filters_sync	= etm_addr_filters_sync;
 	etm_pmu.addr_filters_validate	= etm_addr_filters_validate;
 	etm_pmu.nr_addr_filters		= ETM_ADDR_CMP_MAX;
+	etm_pmu.module			= THIS_MODULE;

 	ret = perf_pmu_register(&etm_pmu, CORESIGHT_ETM_PMU_NAME, -1);
 	if (ret == 0)
--- a/drivers/i2c/busses/i2c-powermac.c
+++ b/drivers/i2c/busses/i2c-powermac.c
@ -284,7 +284,7 @@ static bool i2c_powermac_get_type(struct i2c_adapter *adap,
 	 */

 	/* First try proper modalias */
-	if (of_modalias_node(node, tmp, sizeof(tmp)) >= 0) {
+	if (of_alias_from_compatible(node, tmp, sizeof(tmp)) >= 0) {
 		snprintf(type, type_size, "MAC,%s", tmp);
 		return true;
 	}
--- a/drivers/i2c/i2c-core-of.c
+++ b/drivers/i2c/i2c-core-of.c
@ -27,7 +27,7 @@ int of_i2c_get_board_info(struct device *dev, struct device_node *node,

 	memset(info, 0, sizeof(*info));

-	if (of_modalias_node(node, info->type, sizeof(info->type)) < 0) {
+	if (of_alias_from_compatible(node, info->type, sizeof(info->type)) < 0) {
 		dev_err(dev, "of_i2c: modalias failure on %pOF\n", node);
 		return -EINVAL;
 	}
--- a/drivers/iio/Kconfig
+++ b/drivers/iio/Kconfig
@ -30,6 +30,9 @@ config IIO_CONFIGFS
 	  (e.g. software triggers). For more info see
 	  Documentation/iio/iio_configfs.rst.

+config IIO_GTS_HELPER
+	tristate
+
 config IIO_TRIGGER
 	bool "Enable triggered sampling support"
 	help
--- a/drivers/iio/Makefile
+++ b/drivers/iio/Makefile
@ -9,6 +9,7 @@ industrialio-$(CONFIG_IIO_BUFFER) += industrialio-buffer.o
 industrialio-$(CONFIG_IIO_TRIGGER) += industrialio-trigger.o

 obj-$(CONFIG_IIO_CONFIGFS) += industrialio-configfs.o
+obj-$(CONFIG_IIO_GTS_HELPER) += industrialio-gts-helper.o
 obj-$(CONFIG_IIO_SW_DEVICE) += industrialio-sw-device.o
 obj-$(CONFIG_IIO_SW_TRIGGER) += industrialio-sw-trigger.o
 obj-$(CONFIG_IIO_TRIGGERED_EVENT) += industrialio-triggered-event.o
--- a/drivers/iio/accel/bma400_core.c
+++ b/drivers/iio/accel/bma400_core.c
@ -1688,7 +1688,7 @@ static irqreturn_t bma400_interrupt(int irq, void *private)

 	if (FIELD_GET(BMA400_INT_DRDY_MSK, le16_to_cpu(data->status))) {
 		mutex_unlock(&data->mutex);
-		iio_trigger_poll_chained(data->trig);
+		iio_trigger_poll_nested(data->trig);
 		return IRQ_HANDLED;
 	}

--- a/drivers/iio/accel/kionix-kx022a.c
+++ b/drivers/iio/accel/kionix-kx022a.c
@ -162,7 +162,6 @@ struct kx022a_data {
 	int inc_reg;
 	int ien_reg;

-	unsigned int g_range;
 	unsigned int state;
 	unsigned int odr_ns;

@ -900,7 +899,7 @@ static irqreturn_t kx022a_irq_thread_handler(int irq, void *private)
 	mutex_lock(&data->mutex);

 	if (data->trigger_enabled) {
-		iio_trigger_poll_chained(data->trig);
+		iio_trigger_poll_nested(data->trig);
 		ret = IRQ_HANDLED;
 	}

--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@ -1067,7 +1067,7 @@ static irqreturn_t mma8452_interrupt(int irq, void *p)
 		return IRQ_NONE;

 	if (src & MMA8452_INT_DRDY) {
-		iio_trigger_poll_chained(indio_dev->trig);
+		iio_trigger_poll_nested(indio_dev->trig);
 		ret = IRQ_HANDLED;
 	}

--- a/drivers/iio/accel/msa311.c
+++ b/drivers/iio/accel/msa311.c
@ -951,7 +951,7 @@ static irqreturn_t msa311_irq_thread(int irq, void *p)
 	}

 	if (new_data_int_enabled)
-		iio_trigger_poll_chained(msa311->new_data_trig);
+		iio_trigger_poll_nested(msa311->new_data_trig);

 	return IRQ_HANDLED;
 }
--- a/Show More
+++ b/Show More