linux-kernel - Re: [PATCH 2/4] pwm: sunxi: document OF bindings

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Date:	Mon, 31 Mar 2014 16:46:17 +0200
From:	maxime.ripard@...e-electrons.com
To:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	linux-pwm@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 2/4] pwm: sunxi: document OF bindings

On Mon, Mar 31, 2014 at 02:07:27PM +0200, Alexandre Belloni wrote:
> This is the documentation for the Allwinner Socs PWM bindings.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> ---
> Cc: devicetree@...r.kernel.org
>  Documentation/devicetree/bindings/pwm/pwm-sunxi.txt | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sunxi.txt
> 
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-sunxi.txt b/Documentation/devicetree/bindings/pwm/pwm-sunxi.txt
> new file mode 100644
> index 000000000000..e295a50813af
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-sunxi.txt
> @@ -0,0 +1,19 @@
> +Allwinner PWM controller
> +
> +Required properties:
> +  - compatible: should be one of:
> +    - "allwinner,sun4i-pwm"
> +    - "allwinner,sun7i-pwm"
> +  - reg: physical base address and length of the controller's registers

You also seem to need a clocks property.

> +  - #pwm-cells: should be 3. See pwm.txt in this directory for a description of
> +    the cells format.
> +
> +Example:
> +
> +	pwm: pwm@...20e00 {
> +		compatible = "allwinner,sun7i-pwm";

Like Emilio pointed out, the compatible pattern is <family>-<soc>-pwm,
so: sun4i-a10-pwm and sun7i-a20-pwm.

> +		reg = <0x01c20e00 0xc>;
> +		clocks = <&osc24M>;
> +		#pwm-cells = <3>;
> +		status = "disabled";
> +	};
> -- 
> 1.8.3.2
> 

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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