[PATCH 01/12] pinctrl: dt-bindings: Add documentation for Aspeed pin controllers

[Rob Herring]

On Wed, Jul 20, 2016 at 03:28:22PM +0930, Andrew Jeffery wrote:
> 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: Andrew Jeffery <andrew at aj.id.au>
> ---
>  .../devicetree/bindings/pinctrl/pinctrl-aspeed.txt | 45 ++++++++++++++++++++++
>  MAINTAINERS                                        |  1 +
>  2 files changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/pinctrl-aspeed.txt
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-aspeed.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-aspeed.txt
> new file mode 100644
> index 000000000000..5aac6a0a2e89
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-aspeed.txt
> @@ -0,0 +1,45 @@
> +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 one of the following:
> +	"aspeed,g4-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:
> +
> +Please refer to pinctrl-bindings.txt in this directory for details of the
> +common pinctrl bindings used by client devices.
> +
> +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.
> +
> +Examples:
> +
> +syscon: scu at 1e6e2000 {
> +	compatible = "syscon", "simple-mfd";
> +	reg = <0x1e6e2000 0x1a8>;
> +
> +	pinctrl: pinctrl at 1e6e2000 {
> +		compatible = "aspeed,g4-pinctrl";
> +
> +		pinctrl_i2c3_default: i2c3_default {
> +			function = "I2C3";
> +			groups = "I2C3";

All these strings need to be documented.

> +		};
> +	};
> +};
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 1209323b7e43..b5f2d3576d3a 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1003,6 +1003,7 @@ S:	Maintained
>  F:	arch/arm/mach-aspeed/
>  F:	arch/arm/boot/dts/aspeed-*
>  F:	drivers/*/*aspeed*
> +F:	Documentation/devicetree/bindings/*/*aspeed*
>  
>  ARM/ATMEL AT91RM9200, AT91SAM9 AND SAMA5 SOC SUPPORT
>  M:	Nicolas Ferre <nicolas.ferre at atmel.com>
> -- 
> 2.7.4
> 
> 
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