linux-kernel - Re: [PATCH v4 1/3] ARM: dts: vf500-colibri: Add device tree node for touchscreen support

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Date:	Sat, 22 Aug 2015 18:54:28 -0700
From:	Stefan Agner <stefan@...er.ch>
To:	Sanchayan Maity <maitysanchayan@...il.com>
Cc:	dmitry.torokhov@...il.com, linux-input@...r.kernel.org,
	devicetree@...r.kernel.org, shawnguo@...nel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/3] ARM: dts: vf500-colibri: Add device tree node for
 touchscreen support

On 2015-08-21 06:26, Sanchayan Maity wrote:
> Add device tree node for touchscreen support on Colibri VF50. The
> touchscreen functionality on VF50 uses the ADC channels of Vybrid
> and some GPIOs. Also add pinctrl nodes for proper pinmux.
> 
> Signed-off-by: Sanchayan Maity <maitysanchayan@...il.com>
> ---
>  arch/arm/boot/dts/vf500-colibri-eval-v3.dts |  4 +++
>  arch/arm/boot/dts/vf500-colibri.dtsi        | 47 +++++++++++++++++++++++++++++
>  2 files changed, 51 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/vf500-colibri-eval-v3.dts
> b/arch/arm/boot/dts/vf500-colibri-eval-v3.dts
> index 7fc782c..14c0b00 100644
> --- a/arch/arm/boot/dts/vf500-colibri-eval-v3.dts
> +++ b/arch/arm/boot/dts/vf500-colibri-eval-v3.dts
> @@ -15,3 +15,7 @@
>  	model = "Toradex Colibri VF50 on Colibri Evaluation Board";
>  	compatible = "toradex,vf500-colibri_vf50-on-eval",
> "toradex,vf500-colibri_vf50", "fsl,vf500";
>  };
> +
> +&touchscreen {
> +	status = "okay";
> +};
> diff --git a/arch/arm/boot/dts/vf500-colibri.dtsi
> b/arch/arm/boot/dts/vf500-colibri.dtsi
> index cee34a3..84f091d 100644
> --- a/arch/arm/boot/dts/vf500-colibri.dtsi
> +++ b/arch/arm/boot/dts/vf500-colibri.dtsi
> @@ -17,4 +17,51 @@
>  	memory {
>  		reg = <0x80000000 0x8000000>;
>  	};
> +
> +	touchscreen: vf50-touchscreen {
> +		compatible = "toradex,vf50-touchscreen";
> +		io-channels = <&adc1 0>,<&adc0 0>,
> +				<&adc0 1>,<&adc1 2>;
> +		xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
> +		xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
> +		yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
> +		ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
> +		interrupt-parent = <&gpio0>;
> +		interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
> +		pinctrl-names = "idle","default","gpios";
> +		pinctrl-0 = <&pinctrl_touchctrl_idle>;
> +		pinctrl-1 = <&pinctrl_touchctrl_default>;
> +		pinctrl-2 = <&pinctrl_touchctrl_gpios>;
> +		vf50-ts-min-pressure = <200>;

Since this is a touch screen related property, we even would want to
have that in the board specific device-tree (vf500-colibri-eval-v3.dts).


--
Stefan
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