linux-kernel - Re: [PATCH 3/3] ARM: dts: vf610-colibri: Add backlight support

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Date:	Thu, 18 Sep 2014 22:17:06 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
CC:	<stefan@...er.ch>, <linux@....linux.org.uk>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] ARM: dts: vf610-colibri: Add backlight support

On Wed, Sep 17, 2014 at 01:46:30PM +0530, Bhuvanchandra DV wrote:
> 
> Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
> ---
>  arch/arm/boot/dts/vf610-colibri-eval-v3.dts |    6 ++++++
>  arch/arm/boot/dts/vf610-colibri.dtsi        |    7 +++++++
>  2 files changed, 13 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> index ba98039..f1988a0 100644
> --- a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> +++ b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> @@ -52,3 +52,9 @@
>  &pwm1 {
>  	status = "okay";
>  };
> +
> +&backlight {
> +	brightness-levels = <0 4 8 16 32 64 128 255>;
> +	default-brightness-level = <6>;
> +	status  = "okay";
> +};
> diff --git a/arch/arm/boot/dts/vf610-colibri.dtsi b/arch/arm/boot/dts/vf610-colibri.dtsi
> index 9bd1415..e725306 100644
> --- a/arch/arm/boot/dts/vf610-colibri.dtsi
> +++ b/arch/arm/boot/dts/vf610-colibri.dtsi
> @@ -25,6 +25,13 @@
>  		};
>  	};
>  
> +	backlight: bl {

I would suggest we name the node following the example in
Documentation/devicetree/bindings/pwm/pwm.txt, i.e. bl: backlight.

> +		compitable = "pwm-backlight";
> +		pwms = <&pwm0 0 5000000 0>;
> +		pwm-names = " backlight";

Drop the leading space in the string.

Shawn

> +		status = "disabled";
> +	};
> +
>  };
>  
>  &esdhc1 {
> -- 
> 1.7.9.5
> 
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