[PATCH 3/6] gpio: dt-bindings: Add documentation for gpio controllers on Armada 7K/8K

[Rob Herring]

On Fri, May 19, 2017 at 06:09:22PM +0200, Gregory CLEMENT wrote:
> Document the device tree binding for the gpio controllers found on the
> Marvell Armada 7K and Armada 8K SoCs.
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement at free-electrons.com>
> ---
>  Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt  | 20 ++++++++++++++++++++
>  Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt | 24 +++++++++++++++++++++++-
>  Documentation/devicetree/bindings/gpio/gpio-mvebu.txt                      | 24 +++++++++++++++++-------
>  3 files changed, 60 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt b/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> index 4228d158fb31..0b887440e08a 100644
> --- a/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> +++ b/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> @@ -64,6 +64,17 @@ mpp17	17	gpio
>  mpp18	18	gpio
>  mpp19	19	gpio, uart0(rxd), sdio(pw_off)
>  
> +GPIO:
> +-----
> +For common binding part and usage, refer to
> +Documentation/devicetree/bindings/gpio/gpio-mvebu.txt.
> +
> +Required properties:
> +
> +- compatible: "marvell,armada-8k-gpio"
> +
> +- offset: offset address inside the syscon block
> +
>  Example:
>  ap_syscon: system-controller at 6f4000 {
>  	compatible = "syscon", "simple-mfd";
> @@ -77,4 +88,13 @@ ap_syscon: system-controller at 6f4000 {
>  	ap_pinctrl: pinctrl {
>  		compatible = "marvell,ap806-pinctrl";
>  	};
> +
> +	ap_gpio: gpio {
> +		compatible = "marvell,armada-8k-gpio";
> +		offset = <0x1040>;
> +		ngpios = <19>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		gpio-ranges = <&ap_pinctrl 0 0 19>;
> +	};
>  };
> diff --git a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt
> index 733beac7724e..655c114ef584 100644
> --- a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt
> +++ b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt
> @@ -149,6 +149,18 @@ mpp60	60	gpio, mss_gpio6, ptp(pulse), tdm(dtx), au(i2smclk), spi0(csn1), uart0(r
>  mpp61	61	gpio, mss_gpio5, ptp(clk), tdm(pclk), au(i2sextclk), spi0(csn2), uart0(txd), uart2(txd), sata1(present_act), ge(mdio), sdio(d3)
>  mpp62	62	gpio, mss_gpio4, synce1(clk), ptp(pclk_out), sata1(present_act), spi0(csn3), uart0(rxd), uart2(rxd), sata0(present_act), ge(mdc)
>  
> +GPIO:
> +-----
> +
> +For common binding part and usage, refer to
> +Documentation/devicetree/bindings/gpio/gpio-mvebu.txt.
> +
> +Required properties:
> +
> +- compatible: "marvell,armada-8k-gpio"
> +
> +- offset: offset address inside the syscon block
> +
>  Example:
>  
>  cpm_syscon0: system-controller at 440000 {
> @@ -163,5 +175,15 @@ cpm_syscon0: system-controller at 440000 {
>  	cpm_pinctrl: pinctrl {
>  		compatible = "marvell,armada-8k-cpm-pinctrl";
>  	};
> -};
>  
> +	cpm_gpio1: gpio at 100 {
> +		compatible = "marvell,armada-8k-gpio";
> +		offset = <0x100>;
> +		ngpios = <32>;
> +		gpio-controller;
> +		#gpio-cells = <2>;
> +		gpio-ranges = <&cpm_pinctrl 0 0 32>;
> +		status = "disabled";
> +	};
> +
> +};
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
> index 42c3bb2d53e8..2c5304ff467c 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
> +++ b/Documentation/devicetree/bindings/gpio/gpio-mvebu.txt
> @@ -2,17 +2,27 @@
>  
>  Required properties:
>  
> -- compatible : Should be "marvell,orion-gpio", "marvell,mv78200-gpio"
> -  or "marvell,armadaxp-gpio". "marvell,orion-gpio" should be used for
> -  Orion, Kirkwood, Dove, Discovery (except MV78200) and Armada
> -  370. "marvell,mv78200-gpio" should be used for the Discovery
> -  MV78200. "marvel,armadaxp-gpio" should be used for all Armada XP
> -  SoCs (MV78230, MV78260, MV78460).
> +- compatible : Should be "marvell,orion-gpio", "marvell,mv78200-gpio",
> +  "marvell,armadaxp-gpio" or "marvell,armada-8k-gpio".
> +
> +    "marvell,orion-gpio" should be used for Orion, Kirkwood, Dove,
> +    Discovery (except MV78200) and Armada 370. "marvell,mv78200-gpio"
> +    should be used for the Discovery MV78200.
> +
> +    "marvel,armadaxp-gpio" should be used for all Armada XP SoCs
> +    (MV78230, MV78260, MV78460).
> +
> +    "marvell,armada-8k-gpio" should be used for the Armada 7K and 8K
> +    SoCs (either from AP or CP), see
> +    Documentation/devicetree/bindings/arm/marvell/cp110-system-controller0.txt
> +    and
> +    Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> +    for specific details about the offset property.
>  
>  - reg: Address and length of the register set for the device. Only one
>    entry is expected, except for the "marvell,armadaxp-gpio" variant
>    for which two entries are expected: one for the general registers,
> -  one for the per-cpu registers.
> +  one for the per-cpu registers. Not used for marvell,armada-8k-gpio.

Why can't use you use reg instead of offset?

Rob