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ARM SOC PM domain support for 4.12
Dave Gerlach (5):
PM / Domains: Add generic data pointer to genpd data struct
PM / Domains: Do not check if simple providers have phandle cells
dt-bindings: Add TI SCI PM Domains
soc: ti: Add ti_sci_pm_domains driver
ARM: keystone: Drop PM domain support for k2g
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Merge tag 'arm-soc-pmdomain' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/drivers
ARM SOC PM domain support for 4.12
Dave Gerlach (5):
PM / Domains: Add generic data pointer to genpd data struct
PM / Domains: Do not check if simple providers have phandle cells
dt-bindings: Add TI SCI PM Domains
soc: ti: Add ti_sci_pm_domains driver
ARM: keystone: Drop PM domain support for k2g
* tag 'arm-soc-pmdomain' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
ARM: keystone: Drop PM domain support for k2g
soc: ti: Add ti_sci_pm_domains driver
dt-bindings: Add TI SCI PM Domains
PM / Domains: Do not check if simple providers have phandle cells
PM / Domains: Add generic data pointer to genpd data struct
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Olof Johansson
commit
fe8fee6901
57
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
Normal file
57
Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
Normal file
@ -0,0 +1,57 @@
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Texas Instruments TI-SCI Generic Power Domain
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---------------------------------------------
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Some TI SoCs contain a system controller (like the PMMC, etc...) that is
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responsible for controlling the state of the IPs that are present.
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Communication between the host processor running an OS and the system
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controller happens through a protocol known as TI-SCI [1].
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[1] Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
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PM Domain Node
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==============
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The PM domain node represents the global PM domain managed by the PMMC, which
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in this case is the implementation as documented by the generic PM domain
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bindings in Documentation/devicetree/bindings/power/power_domain.txt. Because
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this relies on the TI SCI protocol to communicate with the PMMC it must be a
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child of the pmmc node.
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Required Properties:
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--------------------
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- compatible: should be "ti,sci-pm-domain"
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- #power-domain-cells: Must be 1 so that an id can be provided in each
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device node.
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Example (K2G):
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-------------
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pmmc: pmmc {
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compatible = "ti,k2g-sci";
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...
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k2g_pds: power-controller {
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compatible = "ti,sci-pm-domain";
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#power-domain-cells = <1>;
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};
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};
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PM Domain Consumers
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===================
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Hardware blocks belonging to a PM domain should contain a "power-domains"
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property that is a phandle pointing to the corresponding PM domain node
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along with an index representing the device id to be passed to the PMMC
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for device control.
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Required Properties:
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--------------------
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- power-domains: phandle pointing to the corresponding PM domain node
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and an ID representing the device.
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See dt-bindings/genpd/k2g.h for the list of valid identifiers for k2g.
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Example (K2G):
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--------------------
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uart0: serial@02530c00 {
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compatible = "ns16550a";
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...
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power-domains = <&k2g_pds K2G_DEV_UART0>;
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};
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@ -12384,6 +12384,9 @@ S: Maintained
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F: Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
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F: drivers/firmware/ti_sci*
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F: include/linux/soc/ti/ti_sci_protocol.h
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F: Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
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F: include/dt-bindings/genpd/k2g.h
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F: drivers/soc/ti/ti_sci_pm_domains.c
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THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER
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M: Hans Verkuil <hverkuil@xs4all.nl>
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@ -10,6 +10,7 @@ config ARCH_KEYSTONE
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select ARCH_SUPPORTS_BIG_ENDIAN
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select ZONE_DMA if ARM_LPAE
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select PINCTRL
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select PM_GENERIC_DOMAINS if PM
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help
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Support for boards based on the Texas Instruments Keystone family of
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SoCs.
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@ -32,7 +32,9 @@ static struct pm_clk_notifier_block platform_domain_notifier = {
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};
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static const struct of_device_id of_keystone_table[] = {
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{.compatible = "ti,keystone"},
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{.compatible = "ti,k2hk"},
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{.compatible = "ti,k2e"},
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{.compatible = "ti,k2l"},
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{ /* end of list */ },
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};
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@ -1622,8 +1622,6 @@ static struct generic_pm_domain *genpd_xlate_simple(
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struct of_phandle_args *genpdspec,
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void *data)
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{
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if (genpdspec->args_count != 0)
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return ERR_PTR(-EINVAL);
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return data;
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}
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@ -38,4 +38,16 @@ config WKUP_M3_IPC
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to communicate and use the Wakeup M3 for PM features like suspend
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resume and boots it using wkup_m3_rproc driver.
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config TI_SCI_PM_DOMAINS
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tristate "TI SCI PM Domains Driver"
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depends on TI_SCI_PROTOCOL
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depends on PM_GENERIC_DOMAINS
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help
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Generic power domain implementation for TI device implementing
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the TI SCI protocol.
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To compile this as a module, choose M here. The module will be
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called ti_sci_pm_domains. Note this is needed early in boot before
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rootfs may be available.
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endif # SOC_TI
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@ -5,3 +5,4 @@ obj-$(CONFIG_KEYSTONE_NAVIGATOR_QMSS) += knav_qmss.o
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knav_qmss-y := knav_qmss_queue.o knav_qmss_acc.o
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obj-$(CONFIG_KEYSTONE_NAVIGATOR_DMA) += knav_dma.o
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obj-$(CONFIG_WKUP_M3_IPC) += wkup_m3_ipc.o
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obj-$(CONFIG_TI_SCI_PM_DOMAINS) += ti_sci_pm_domains.o
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202
drivers/soc/ti/ti_sci_pm_domains.c
Normal file
202
drivers/soc/ti/ti_sci_pm_domains.c
Normal file
@ -0,0 +1,202 @@
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/*
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* TI SCI Generic Power Domain Driver
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*
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* Copyright (C) 2015-2017 Texas Instruments Incorporated - https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ti.com_&d=DwIBAg&c=RoP1YumCXCgaWHvlZYR8PQcxBKCX5YTpkKY057SbK10&r=XBn1JQGPwR8CsE7xpP3wPlG6DQU7qw8ym65xieNZ4hY&m=R6qGiR9DbG1C3EF_0mL-m-qkmSO64GklbFWpUzqt8fY&s=YTWcQCWi5lnIf4XHDLq1XDd4JbZv9xpqOwdPD8xEdZE&e=
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* J Keerthy <j-keerthy@ti.com>
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* Dave Gerlach <d-gerlach@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/pm_domain.h>
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#include <linux/slab.h>
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#include <linux/soc/ti/ti_sci_protocol.h>
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/**
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* struct ti_sci_genpd_dev_data: holds data needed for every device attached
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* to this genpd
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* @idx: index of the device that identifies it with the system
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* control processor.
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*/
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struct ti_sci_genpd_dev_data {
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int idx;
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};
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/**
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* struct ti_sci_pm_domain: TI specific data needed for power domain
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* @ti_sci: handle to TI SCI protocol driver that provides ops to
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* communicate with system control processor.
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* @dev: pointer to dev for the driver for devm allocs
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* @pd: generic_pm_domain for use with the genpd framework
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*/
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struct ti_sci_pm_domain {
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const struct ti_sci_handle *ti_sci;
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struct device *dev;
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struct generic_pm_domain pd;
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};
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#define genpd_to_ti_sci_pd(gpd) container_of(gpd, struct ti_sci_pm_domain, pd)
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/**
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* ti_sci_dev_id(): get prepopulated ti_sci id from struct dev
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* @dev: pointer to device associated with this genpd
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*
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* Returns device_id stored from ti,sci_id property
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*/
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static int ti_sci_dev_id(struct device *dev)
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{
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struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
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struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
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return sci_dev_data->idx;
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}
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/**
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* ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle
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* @dev: pointer to device associated with this genpd
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*
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* Returns ti_sci_handle to be used to communicate with system
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* control processor.
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*/
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static const struct ti_sci_handle *ti_sci_dev_to_sci_handle(struct device *dev)
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{
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struct generic_pm_domain *pd = pd_to_genpd(dev->pm_domain);
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struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(pd);
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return ti_sci_genpd->ti_sci;
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}
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/**
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* ti_sci_dev_start(): genpd device start hook called to turn device on
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* @dev: pointer to device associated with this genpd to be powered on
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*/
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static int ti_sci_dev_start(struct device *dev)
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{
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const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev);
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int idx = ti_sci_dev_id(dev);
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return ti_sci->ops.dev_ops.get_device(ti_sci, idx);
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}
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/**
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* ti_sci_dev_stop(): genpd device stop hook called to turn device off
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* @dev: pointer to device associated with this genpd to be powered off
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*/
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static int ti_sci_dev_stop(struct device *dev)
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{
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const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev);
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int idx = ti_sci_dev_id(dev);
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return ti_sci->ops.dev_ops.put_device(ti_sci, idx);
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}
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static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain,
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struct device *dev)
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{
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struct device_node *np = dev->of_node;
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struct of_phandle_args pd_args;
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struct ti_sci_pm_domain *ti_sci_genpd = genpd_to_ti_sci_pd(domain);
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const struct ti_sci_handle *ti_sci = ti_sci_genpd->ti_sci;
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struct ti_sci_genpd_dev_data *sci_dev_data;
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struct generic_pm_domain_data *genpd_data;
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int idx, ret = 0;
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ret = of_parse_phandle_with_args(np, "power-domains",
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"#power-domain-cells", 0, &pd_args);
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if (ret < 0)
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return ret;
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if (pd_args.args_count != 1)
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return -EINVAL;
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idx = pd_args.args[0];
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/*
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* Check the validity of the requested idx, if the index is not valid
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* the PMMC will return a NAK here and we will not allocate it.
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*/
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ret = ti_sci->ops.dev_ops.is_valid(ti_sci, idx);
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if (ret)
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return -EINVAL;
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sci_dev_data = kzalloc(sizeof(*sci_dev_data), GFP_KERNEL);
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if (!sci_dev_data)
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return -ENOMEM;
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sci_dev_data->idx = idx;
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genpd_data = dev_gpd_data(dev);
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genpd_data->data = sci_dev_data;
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return 0;
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}
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static void ti_sci_pd_detach_dev(struct generic_pm_domain *domain,
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struct device *dev)
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{
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struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
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struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
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kfree(sci_dev_data);
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genpd_data->data = NULL;
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}
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static const struct of_device_id ti_sci_pm_domain_matches[] = {
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{ .compatible = "ti,sci-pm-domain", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, ti_sci_pm_domain_matches);
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static int ti_sci_pm_domain_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct device_node *np = dev->of_node;
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struct ti_sci_pm_domain *ti_sci_pd;
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int ret;
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ti_sci_pd = devm_kzalloc(dev, sizeof(*ti_sci_pd), GFP_KERNEL);
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if (!ti_sci_pd)
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return -ENOMEM;
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ti_sci_pd->ti_sci = devm_ti_sci_get_handle(dev);
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if (IS_ERR(ti_sci_pd->ti_sci))
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return PTR_ERR(ti_sci_pd->ti_sci);
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ti_sci_pd->dev = dev;
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ti_sci_pd->pd.attach_dev = ti_sci_pd_attach_dev;
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ti_sci_pd->pd.detach_dev = ti_sci_pd_detach_dev;
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ti_sci_pd->pd.dev_ops.start = ti_sci_dev_start;
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ti_sci_pd->pd.dev_ops.stop = ti_sci_dev_stop;
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pm_genpd_init(&ti_sci_pd->pd, NULL, true);
|
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ret = of_genpd_add_provider_simple(np, &ti_sci_pd->pd);
|
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|
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return ret;
|
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}
|
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|
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static struct platform_driver ti_sci_pm_domains_driver = {
|
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.probe = ti_sci_pm_domain_probe,
|
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.driver = {
|
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.name = "ti_sci_pm_domains",
|
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.of_match_table = ti_sci_pm_domain_matches,
|
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},
|
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};
|
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module_platform_driver(ti_sci_pm_domains_driver);
|
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MODULE_LICENSE("GPL v2");
|
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MODULE_DESCRIPTION("TI System Control Interface (SCI) Power Domain driver");
|
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MODULE_AUTHOR("Dave Gerlach");
|
||||
90
include/dt-bindings/genpd/k2g.h
Normal file
90
include/dt-bindings/genpd/k2g.h
Normal file
@ -0,0 +1,90 @@
|
||||
/*
|
||||
* TI K2G SoC Device definitions
|
||||
*
|
||||
* Copyright (C) 2015-2017 Texas Instruments Incorporated - https://urldefense.proofpoint.com/v2/url?u=http-3A__www.ti.com_&d=DwIBAg&c=RoP1YumCXCgaWHvlZYR8PQcxBKCX5YTpkKY057SbK10&r=XBn1JQGPwR8CsE7xpP3wPlG6DQU7qw8ym65xieNZ4hY&m=K-anSnBVCpVU_mSaI7FWz6dwIAPBePhk6w9rCref6SI&s=UvxGRJAJRKjDVjwUuXloC2gH4uWNkMelLuW2oG01DPM&e=
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*/
|
||||
|
||||
#ifndef _DT_BINDINGS_GENPD_K2G_H
|
||||
#define _DT_BINDINGS_GENPD_K2G_H
|
||||
|
||||
/* Documented in https://urldefense.proofpoint.com/v2/url?u=http-3A__processors.wiki.ti.com_index.php_TISCI&d=DwIBAg&c=RoP1YumCXCgaWHvlZYR8PQcxBKCX5YTpkKY057SbK10&r=XBn1JQGPwR8CsE7xpP3wPlG6DQU7qw8ym65xieNZ4hY&m=K-anSnBVCpVU_mSaI7FWz6dwIAPBePhk6w9rCref6SI&s=OUR-PBKiUWN0Bhs-J9hzlER8kpqh_V70s09xc8Zo1iA&e= */
|
||||
|
||||
#define K2G_DEV_PMMC0 0x0000
|
||||
#define K2G_DEV_MLB0 0x0001
|
||||
#define K2G_DEV_DSS0 0x0002
|
||||
#define K2G_DEV_MCBSP0 0x0003
|
||||
#define K2G_DEV_MCASP0 0x0004
|
||||
#define K2G_DEV_MCASP1 0x0005
|
||||
#define K2G_DEV_MCASP2 0x0006
|
||||
#define K2G_DEV_DCAN0 0x0008
|
||||
#define K2G_DEV_DCAN1 0x0009
|
||||
#define K2G_DEV_EMIF0 0x000a
|
||||
#define K2G_DEV_MMCHS0 0x000b
|
||||
#define K2G_DEV_MMCHS1 0x000c
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||||
#define K2G_DEV_GPMC0 0x000d
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||||
#define K2G_DEV_ELM0 0x000e
|
||||
#define K2G_DEV_SPI0 0x0010
|
||||
#define K2G_DEV_SPI1 0x0011
|
||||
#define K2G_DEV_SPI2 0x0012
|
||||
#define K2G_DEV_SPI3 0x0013
|
||||
#define K2G_DEV_ICSS0 0x0014
|
||||
#define K2G_DEV_ICSS1 0x0015
|
||||
#define K2G_DEV_USB0 0x0016
|
||||
#define K2G_DEV_USB1 0x0017
|
||||
#define K2G_DEV_NSS0 0x0018
|
||||
#define K2G_DEV_PCIE0 0x0019
|
||||
#define K2G_DEV_GPIO0 0x001b
|
||||
#define K2G_DEV_GPIO1 0x001c
|
||||
#define K2G_DEV_TIMER64_0 0x001d
|
||||
#define K2G_DEV_TIMER64_1 0x001e
|
||||
#define K2G_DEV_TIMER64_2 0x001f
|
||||
#define K2G_DEV_TIMER64_3 0x0020
|
||||
#define K2G_DEV_TIMER64_4 0x0021
|
||||
#define K2G_DEV_TIMER64_5 0x0022
|
||||
#define K2G_DEV_TIMER64_6 0x0023
|
||||
#define K2G_DEV_MSGMGR0 0x0025
|
||||
#define K2G_DEV_BOOTCFG0 0x0026
|
||||
#define K2G_DEV_ARM_BOOTROM0 0x0027
|
||||
#define K2G_DEV_DSP_BOOTROM0 0x0029
|
||||
#define K2G_DEV_DEBUGSS0 0x002b
|
||||
#define K2G_DEV_UART0 0x002c
|
||||
#define K2G_DEV_UART1 0x002d
|
||||
#define K2G_DEV_UART2 0x002e
|
||||
#define K2G_DEV_EHRPWM0 0x002f
|
||||
#define K2G_DEV_EHRPWM1 0x0030
|
||||
#define K2G_DEV_EHRPWM2 0x0031
|
||||
#define K2G_DEV_EHRPWM3 0x0032
|
||||
#define K2G_DEV_EHRPWM4 0x0033
|
||||
#define K2G_DEV_EHRPWM5 0x0034
|
||||
#define K2G_DEV_EQEP0 0x0035
|
||||
#define K2G_DEV_EQEP1 0x0036
|
||||
#define K2G_DEV_EQEP2 0x0037
|
||||
#define K2G_DEV_ECAP0 0x0038
|
||||
#define K2G_DEV_ECAP1 0x0039
|
||||
#define K2G_DEV_I2C0 0x003a
|
||||
#define K2G_DEV_I2C1 0x003b
|
||||
#define K2G_DEV_I2C2 0x003c
|
||||
#define K2G_DEV_EDMA0 0x003f
|
||||
#define K2G_DEV_SEMAPHORE0 0x0040
|
||||
#define K2G_DEV_INTC0 0x0041
|
||||
#define K2G_DEV_GIC0 0x0042
|
||||
#define K2G_DEV_QSPI0 0x0043
|
||||
#define K2G_DEV_ARM_64B_COUNTER0 0x0044
|
||||
#define K2G_DEV_TETRIS0 0x0045
|
||||
#define K2G_DEV_CGEM0 0x0046
|
||||
#define K2G_DEV_MSMC0 0x0047
|
||||
#define K2G_DEV_CBASS0 0x0049
|
||||
#define K2G_DEV_BOARD0 0x004c
|
||||
#define K2G_DEV_EDMA1 0x004f
|
||||
|
||||
#endif
|
||||
@ -117,6 +117,7 @@ struct generic_pm_domain_data {
|
||||
struct pm_domain_data base;
|
||||
struct gpd_timing_data td;
|
||||
struct notifier_block nb;
|
||||
void *data;
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PM_GENERIC_DOMAINS
|
||||
|
||||
Loading…
Reference in New Issue
Block a user