Commit 5f714700 authored by Andrew Jeffery's avatar Andrew Jeffery Committed by Linus Walleij

pinctrl: dt-bindings: Add documentation for Aspeed pin controllers

Outline expectations on the pin controller's relationship with the
System Control Unit (SCU) IP through syscon, and document the compatible
strings for 4th and 5th generation Aspeed SoC pin controllers.
Signed-off-by: default avatarAndrew Jeffery <andrew@aj.id.au>
Acked-by: Rob Herring's avatarRob Herring <robh@kernel.org>
Acked-by: Joel Stanley's avatarJoel Stanley <joel@jms.id.au>
Signed-off-by: Linus Walleij's avatarLinus Walleij <linus.walleij@linaro.org>
parent 29885a65
Aspeed Pin Controllers
----------------------
The Aspeed SoCs vary in functionality inside a generation but have a common mux
device register layout.
Required properties:
- compatible : Should be any one of the following:
"aspeed,ast2400-pinctrl"
"aspeed,g4-pinctrl"
"aspeed,ast2500-pinctrl"
"aspeed,g5-pinctrl"
The pin controller node should be a child of a syscon node with the required
property:
- compatible: "syscon", "simple-mfd"
Refer to the the bindings described in
Documentation/devicetree/bindings/mfd/syscon.txt
Subnode Format
--------------
The required properties of child nodes are (as defined in pinctrl-bindings):
- function
- groups
Each function has only one associated pin group. Each group is named by its
function. The following values for the function and groups properties are
supported:
aspeed,ast2400-pinctrl, aspeed,g4-pinctrl:
ACPI BMCINT DDCCLK DDCDAT FLACK FLBUSY FLWP GPID0 GPIE0 GPIE2 GPIE4 GPIE6 I2C10
I2C11 I2C12 I2C13 I2C3 I2C4 I2C5 I2C6 I2C7 I2C8 I2C9 LPCPD LPCPME LPCSMI MDIO1
MDIO2 NCTS1 NCTS3 NCTS4 NDCD1 NDCD3 NDCD4 NDSR1 NDSR3 NDTR1 NDTR3 NRI1 NRI3
NRI4 NRTS1 NRTS3 PWM0 PWM1 PWM2 PWM3 PWM4 PWM5 PWM6 PWM7 RGMII1 RMII1 ROM16
ROM8 ROMCS1 ROMCS2 ROMCS3 ROMCS4 RXD1 RXD3 RXD4 SD1 SGPMI SIOPBI SIOPBO TIMER3
TIMER5 TIMER6 TIMER7 TIMER8 TXD1 TXD3 TXD4 UART6 VGAHS VGAVS VPI18 VPI24 VPI30
VPO12 VPO24
aspeed,ast2500-pinctrl, aspeed,g5-pinctrl:
GPID0 GPID2 GPIE0 I2C10 I2C11 I2C12 I2C13 I2C14 I2C3 I2C4 I2C5 I2C6 I2C7 I2C8
I2C9 MAC1LINK MDIO1 MDIO2 OSCCLK PEWAKE PWM0 PWM1 PWM2 PWM3 PWM4 PWM5 PWM6 PWM7
RGMII1 RGMII2 RMII1 RMII2 SD1 SPI1 TIMER4 TIMER5 TIMER6 TIMER7 TIMER8
Examples:
syscon: scu@1e6e2000 {
compatible = "syscon", "simple-mfd";
reg = <0x1e6e2000 0x1a8>;
pinctrl: pinctrl {
compatible = "aspeed,g4-pinctrl";
pinctrl_i2c3_default: i2c3_default {
function = "I2C3";
groups = "I2C3";
};
};
};
Please refer to pinctrl-bindings.txt in this directory for details of the
common pinctrl bindings used by client devices.
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment