linux-kernel - Re: [PATCH 2/3] ARM: dts: vf610-colibri: Add PWM support

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Date:	Thu, 18 Sep 2014 22:12:49 +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 2/3] ARM: dts: vf610-colibri: Add PWM support

On Wed, Sep 17, 2014 at 01:46:29PM +0530, Bhuvanchandra DV wrote:
>  The Colibri standard defines four pins as PWM outputs, two of them (PWM
>  A and C) are routed to FTM instance 0 and the other two (PWM B and D)
>  are routed to FTM instance 1. Hence enable both FTM instances for the
>  Colibri module and mux the four pins accordingly.
> 
> Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@...adex.com>
> ---
>  arch/arm/boot/dts/vf610-colibri-eval-v3.dts |    8 ++++++++
>  arch/arm/boot/dts/vf610-colibri.dtsi        |   25 +++++++++++++++++++++++++
>  2 files changed, 33 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> index 7fb3066..ba98039 100644
> --- a/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> +++ b/arch/arm/boot/dts/vf610-colibri-eval-v3.dts
> @@ -44,3 +44,11 @@
>  &uart2 {
>  	status = "okay";
>  };
> +
> +&pwm0 {
> +	status = "okay";
> +};
> +
> +&pwm1 {
> +	status = "okay";
> +};

Please sort the node alphabetically, so that we can locate them more
easily.

> diff --git a/arch/arm/boot/dts/vf610-colibri.dtsi b/arch/arm/boot/dts/vf610-colibri.dtsi
> index 0cd8343..9bd1415 100644
> --- a/arch/arm/boot/dts/vf610-colibri.dtsi
> +++ b/arch/arm/boot/dts/vf610-colibri.dtsi
> @@ -69,6 +69,16 @@
>  	status = "okay";
>  };
>  
> +&pwm0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm0>;
> +};
> +
> +&pwm1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_pwm1>;
> +};
> +

Ditto

>  &iomuxc {
>  	vf610-colibri {
>  		pinctrl_esdhc1: esdhc1grp {
> @@ -119,5 +129,20 @@
>  				VF610_PAD_PTD3__UART2_CTS		0x21a1
>  			>;
>  		};
> +
> +		pinctrl_pwm0: pwm0grp {

We also maintain the alphabetic order of pinctrl_* entries under iomuxc
node.

Shawn

> +			fsl,pins = <
> +				VF610_PAD_PTB0__FTM0_CH0		0x1182
> +				VF610_PAD_PTB1__FTM0_CH1		0x1182
> +			>;
> +		};
> +
> +		pinctrl_pwm1: pwm1grp {
> +			fsl,pins = <
> +				VF610_PAD_PTB8__FTM1_CH0		0x1182
> +				VF610_PAD_PTB9__FTM1_CH1		0x1182
> +			>;
> +		};
> +
>  	};
>  };
> -- 
> 1.7.9.5
> 
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