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209224862c
This patch adds an optional shared block clock to avoid lockups on clock gated controllers. Besides the new clock, clock handling for existing clocks is cleaned up and moved to devm_clk_get. Device tree binding documentation is updated for the new clocks property. Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
525 lines
16 KiB
Plaintext
525 lines
16 KiB
Plaintext
Marvell Discovery mv64[345]6x System Controller chips
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===========================================================
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The Marvell mv64[345]60 series of system controller chips contain
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many of the peripherals needed to implement a complete computer
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system. In this section, we define device tree nodes to describe
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the system controller chip itself and each of the peripherals
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which it contains. Compatible string values for each node are
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prefixed with the string "marvell,", for Marvell Technology Group Ltd.
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1) The /system-controller node
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This node is used to represent the system-controller and must be
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present when the system uses a system controller chip. The top-level
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system-controller node contains information that is global to all
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devices within the system controller chip. The node name begins
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with "system-controller" followed by the unit address, which is
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the base address of the memory-mapped register set for the system
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controller chip.
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Required properties:
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- ranges : Describes the translation of system controller addresses
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for memory mapped registers.
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- clock-frequency: Contains the main clock frequency for the system
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controller chip.
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- reg : This property defines the address and size of the
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memory-mapped registers contained within the system controller
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chip. The address specified in the "reg" property should match
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the unit address of the system-controller node.
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- #address-cells : Address representation for system controller
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devices. This field represents the number of cells needed to
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represent the address of the memory-mapped registers of devices
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within the system controller chip.
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- #size-cells : Size representation for the memory-mapped
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registers within the system controller chip.
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- #interrupt-cells : Defines the width of cells used to represent
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interrupts.
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Optional properties:
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- model : The specific model of the system controller chip. Such
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as, "mv64360", "mv64460", or "mv64560".
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- compatible : A string identifying the compatibility identifiers
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of the system controller chip.
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The system-controller node contains child nodes for each system
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controller device that the platform uses. Nodes should not be created
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for devices which exist on the system controller chip but are not used
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Example Marvell Discovery mv64360 system-controller node:
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system-controller@f1000000 { /* Marvell Discovery mv64360 */
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#address-cells = <1>;
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#size-cells = <1>;
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model = "mv64360"; /* Default */
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compatible = "marvell,mv64360";
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clock-frequency = <133333333>;
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reg = <0xf1000000 0x10000>;
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virtual-reg = <0xf1000000>;
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ranges = <0x88000000 0x88000000 0x1000000 /* PCI 0 I/O Space */
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0x80000000 0x80000000 0x8000000 /* PCI 0 MEM Space */
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0xa0000000 0xa0000000 0x4000000 /* User FLASH */
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0x00000000 0xf1000000 0x0010000 /* Bridge's regs */
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0xf2000000 0xf2000000 0x0040000>;/* Integrated SRAM */
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[ child node definitions... ]
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}
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2) Child nodes of /system-controller
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a) Marvell Discovery MDIO bus
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The MDIO is a bus to which the PHY devices are connected. For each
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device that exists on this bus, a child node should be created. See
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the definition of the PHY node below for an example of how to define
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a PHY.
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Required properties:
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- #address-cells : Should be <1>
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- #size-cells : Should be <0>
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- device_type : Should be "mdio"
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- compatible : Should be "marvell,mv64360-mdio"
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Example:
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mdio {
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#address-cells = <1>;
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#size-cells = <0>;
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device_type = "mdio";
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compatible = "marvell,mv64360-mdio";
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ethernet-phy@0 {
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......
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};
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};
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b) Marvell Discovery ethernet controller
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The Discover ethernet controller is described with two levels
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of nodes. The first level describes an ethernet silicon block
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and the second level describes up to 3 ethernet nodes within
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that block. The reason for the multiple levels is that the
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registers for the node are interleaved within a single set
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of registers. The "ethernet-block" level describes the
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shared register set, and the "ethernet" nodes describe ethernet
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port-specific properties.
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Ethernet block node
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Required properties:
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- #address-cells : <1>
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- #size-cells : <0>
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- compatible : "marvell,mv64360-eth-block"
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- reg : Offset and length of the register set for this block
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Optional properties:
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- clocks : Phandle to the clock control device and gate bit
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Example Discovery Ethernet block node:
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ethernet-block@2000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "marvell,mv64360-eth-block";
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reg = <0x2000 0x2000>;
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ethernet@0 {
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.......
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};
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};
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Ethernet port node
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Required properties:
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- device_type : Should be "network".
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- compatible : Should be "marvell,mv64360-eth".
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- reg : Should be <0>, <1>, or <2>, according to which registers
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within the silicon block the device uses.
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- interrupts : <a> where a is the interrupt number for the port.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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- phy : the phandle for the PHY connected to this ethernet
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controller.
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- local-mac-address : 6 bytes, MAC address
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Example Discovery Ethernet port node:
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ethernet@0 {
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device_type = "network";
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compatible = "marvell,mv64360-eth";
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reg = <0>;
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interrupts = <32>;
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interrupt-parent = <&PIC>;
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phy = <&PHY0>;
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local-mac-address = [ 00 00 00 00 00 00 ];
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};
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c) Marvell Discovery PHY nodes
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Required properties:
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- device_type : Should be "ethernet-phy"
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- interrupts : <a> where a is the interrupt number for this phy.
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- interrupt-parent : the phandle for the interrupt controller that
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services interrupts for this device.
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- reg : The ID number for the phy, usually a small integer
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Example Discovery PHY node:
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ethernet-phy@1 {
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device_type = "ethernet-phy";
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compatible = "broadcom,bcm5421";
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interrupts = <76>; /* GPP 12 */
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interrupt-parent = <&PIC>;
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reg = <1>;
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};
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d) Marvell Discovery SDMA nodes
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Represent DMA hardware associated with the MPSC (multiprotocol
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serial controllers).
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Required properties:
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- compatible : "marvell,mv64360-sdma"
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- reg : Offset and length of the register set for this device
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- interrupts : <a> where a is the interrupt number for the DMA
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device.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery SDMA node:
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sdma@4000 {
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compatible = "marvell,mv64360-sdma";
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reg = <0x4000 0xc18>;
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virtual-reg = <0xf1004000>;
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interrupts = <36>;
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interrupt-parent = <&PIC>;
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};
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e) Marvell Discovery BRG nodes
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Represent baud rate generator hardware associated with the MPSC
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(multiprotocol serial controllers).
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Required properties:
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- compatible : "marvell,mv64360-brg"
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- reg : Offset and length of the register set for this device
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- clock-src : A value from 0 to 15 which selects the clock
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source for the baud rate generator. This value corresponds
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to the CLKS value in the BRGx configuration register. See
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the mv64x60 User's Manual.
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- clock-frequence : The frequency (in Hz) of the baud rate
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generator's input clock.
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- current-speed : The current speed setting (presumably by
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firmware) of the baud rate generator.
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Example Discovery BRG node:
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brg@b200 {
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compatible = "marvell,mv64360-brg";
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reg = <0xb200 0x8>;
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clock-src = <8>;
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clock-frequency = <133333333>;
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current-speed = <9600>;
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};
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f) Marvell Discovery CUNIT nodes
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Represent the Serial Communications Unit device hardware.
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Required properties:
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- reg : Offset and length of the register set for this device
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Example Discovery CUNIT node:
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cunit@f200 {
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reg = <0xf200 0x200>;
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};
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g) Marvell Discovery MPSCROUTING nodes
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Represent the Discovery's MPSC routing hardware
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Required properties:
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- reg : Offset and length of the register set for this device
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Example Discovery CUNIT node:
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mpscrouting@b500 {
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reg = <0xb400 0xc>;
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};
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h) Marvell Discovery MPSCINTR nodes
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Represent the Discovery's MPSC DMA interrupt hardware registers
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(SDMA cause and mask registers).
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Required properties:
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- reg : Offset and length of the register set for this device
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Example Discovery MPSCINTR node:
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mpsintr@b800 {
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reg = <0xb800 0x100>;
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};
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i) Marvell Discovery MPSC nodes
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Represent the Discovery's MPSC (Multiprotocol Serial Controller)
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serial port.
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Required properties:
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- device_type : "serial"
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- compatible : "marvell,mv64360-mpsc"
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- reg : Offset and length of the register set for this device
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- sdma : the phandle for the SDMA node used by this port
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- brg : the phandle for the BRG node used by this port
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- cunit : the phandle for the CUNIT node used by this port
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- mpscrouting : the phandle for the MPSCROUTING node used by this port
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- mpscintr : the phandle for the MPSCINTR node used by this port
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- cell-index : the hardware index of this cell in the MPSC core
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- max_idle : value needed for MPSC CHR3 (Maximum Frame Length)
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register
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- interrupts : <a> where a is the interrupt number for the MPSC.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery MPSCINTR node:
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mpsc@8000 {
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device_type = "serial";
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compatible = "marvell,mv64360-mpsc";
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reg = <0x8000 0x38>;
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virtual-reg = <0xf1008000>;
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sdma = <&SDMA0>;
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brg = <&BRG0>;
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cunit = <&CUNIT>;
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mpscrouting = <&MPSCROUTING>;
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mpscintr = <&MPSCINTR>;
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cell-index = <0>;
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max_idle = <40>;
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interrupts = <40>;
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interrupt-parent = <&PIC>;
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};
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j) Marvell Discovery Watch Dog Timer nodes
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Represent the Discovery's watchdog timer hardware
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Required properties:
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- compatible : "marvell,mv64360-wdt"
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- reg : Offset and length of the register set for this device
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Example Discovery Watch Dog Timer node:
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wdt@b410 {
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compatible = "marvell,mv64360-wdt";
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reg = <0xb410 0x8>;
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};
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k) Marvell Discovery I2C nodes
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Represent the Discovery's I2C hardware
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Required properties:
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- device_type : "i2c"
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- compatible : "marvell,mv64360-i2c"
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- reg : Offset and length of the register set for this device
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- interrupts : <a> where a is the interrupt number for the I2C.
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery I2C node:
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compatible = "marvell,mv64360-i2c";
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reg = <0xc000 0x20>;
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virtual-reg = <0xf100c000>;
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interrupts = <37>;
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interrupt-parent = <&PIC>;
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};
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l) Marvell Discovery PIC (Programmable Interrupt Controller) nodes
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Represent the Discovery's PIC hardware
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Required properties:
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- #interrupt-cells : <1>
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- #address-cells : <0>
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- compatible : "marvell,mv64360-pic"
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- reg : Offset and length of the register set for this device
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- interrupt-controller
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Example Discovery PIC node:
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pic {
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#interrupt-cells = <1>;
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#address-cells = <0>;
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compatible = "marvell,mv64360-pic";
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reg = <0x0 0x88>;
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interrupt-controller;
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};
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m) Marvell Discovery MPP (Multipurpose Pins) multiplexing nodes
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Represent the Discovery's MPP hardware
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Required properties:
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- compatible : "marvell,mv64360-mpp"
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- reg : Offset and length of the register set for this device
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Example Discovery MPP node:
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mpp@f000 {
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compatible = "marvell,mv64360-mpp";
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reg = <0xf000 0x10>;
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};
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n) Marvell Discovery GPP (General Purpose Pins) nodes
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Represent the Discovery's GPP hardware
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Required properties:
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- compatible : "marvell,mv64360-gpp"
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- reg : Offset and length of the register set for this device
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Example Discovery GPP node:
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gpp@f000 {
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compatible = "marvell,mv64360-gpp";
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reg = <0xf100 0x20>;
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};
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o) Marvell Discovery PCI host bridge node
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Represents the Discovery's PCI host bridge device. The properties
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for this node conform to Rev 2.1 of the PCI Bus Binding to IEEE
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1275-1994. A typical value for the compatible property is
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"marvell,mv64360-pci".
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Example Discovery PCI host bridge node
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pci@80000000 {
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#address-cells = <3>;
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#size-cells = <2>;
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#interrupt-cells = <1>;
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device_type = "pci";
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compatible = "marvell,mv64360-pci";
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reg = <0xcf8 0x8>;
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ranges = <0x01000000 0x0 0x0
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0x88000000 0x0 0x01000000
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0x02000000 0x0 0x80000000
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0x80000000 0x0 0x08000000>;
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bus-range = <0 255>;
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clock-frequency = <66000000>;
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interrupt-parent = <&PIC>;
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interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
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interrupt-map = <
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/* IDSEL 0x0a */
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0x5000 0 0 1 &PIC 80
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0x5000 0 0 2 &PIC 81
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0x5000 0 0 3 &PIC 91
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0x5000 0 0 4 &PIC 93
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/* IDSEL 0x0b */
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0x5800 0 0 1 &PIC 91
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0x5800 0 0 2 &PIC 93
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0x5800 0 0 3 &PIC 80
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0x5800 0 0 4 &PIC 81
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/* IDSEL 0x0c */
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0x6000 0 0 1 &PIC 91
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0x6000 0 0 2 &PIC 93
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0x6000 0 0 3 &PIC 80
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0x6000 0 0 4 &PIC 81
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/* IDSEL 0x0d */
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0x6800 0 0 1 &PIC 93
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0x6800 0 0 2 &PIC 80
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0x6800 0 0 3 &PIC 81
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0x6800 0 0 4 &PIC 91
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>;
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};
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p) Marvell Discovery CPU Error nodes
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Represent the Discovery's CPU error handler device.
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Required properties:
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- compatible : "marvell,mv64360-cpu-error"
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- reg : Offset and length of the register set for this device
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- interrupts : the interrupt number for this device
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery CPU Error node:
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cpu-error@0070 {
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compatible = "marvell,mv64360-cpu-error";
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reg = <0x70 0x10 0x128 0x28>;
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interrupts = <3>;
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interrupt-parent = <&PIC>;
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};
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q) Marvell Discovery SRAM Controller nodes
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Represent the Discovery's SRAM controller device.
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Required properties:
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- compatible : "marvell,mv64360-sram-ctrl"
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- reg : Offset and length of the register set for this device
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- interrupts : the interrupt number for this device
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery SRAM Controller node:
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sram-ctrl@0380 {
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compatible = "marvell,mv64360-sram-ctrl";
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reg = <0x380 0x80>;
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interrupts = <13>;
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interrupt-parent = <&PIC>;
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};
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r) Marvell Discovery PCI Error Handler nodes
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Represent the Discovery's PCI error handler device.
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Required properties:
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- compatible : "marvell,mv64360-pci-error"
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- reg : Offset and length of the register set for this device
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- interrupts : the interrupt number for this device
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery PCI Error Handler node:
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pci-error@1d40 {
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compatible = "marvell,mv64360-pci-error";
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reg = <0x1d40 0x40 0xc28 0x4>;
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interrupts = <12>;
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interrupt-parent = <&PIC>;
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};
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s) Marvell Discovery Memory Controller nodes
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Represent the Discovery's memory controller device.
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Required properties:
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- compatible : "marvell,mv64360-mem-ctrl"
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- reg : Offset and length of the register set for this device
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- interrupts : the interrupt number for this device
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- interrupt-parent : the phandle for the interrupt controller
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that services interrupts for this device.
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Example Discovery Memory Controller node:
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mem-ctrl@1400 {
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compatible = "marvell,mv64360-mem-ctrl";
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reg = <0x1400 0x60>;
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interrupts = <17>;
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interrupt-parent = <&PIC>;
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};
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