Subject: Re: [PATCH v2 4/5] ARM: dts: imx6dl: plym2m, prtvt7, victgo: make use of new resistive-adc-touch driver

From: Sam Ravnborg <[email-masked]>
Date: Mon, 31 Jan 2022 16:42:06 +0100

On Mon, Jan 31, 2022 at 11:28:40AM +0100, Oleksij Rempel wrote:
> The tsc2046 is an ADC used as touchscreen controller. To share as mach
                                                                    much
> code as possible, we should use it as actual ADC + virtual touchscreen
> controller.
> With this patch we make use of the new kernel IIO and HID infrastructure.
> 
> Signed-off-by: Oleksij Rempel <[email-masked]>
> ---
>  arch/arm/boot/dts/imx6dl-plym2m.dts | 59 +++++++++++++++++++++--------
>  arch/arm/boot/dts/imx6dl-prtvt7.dts | 57 +++++++++++++++++++++-------
>  arch/arm/boot/dts/imx6dl-victgo.dts | 59 ++++++++++++++++++++++-------
>  3 files changed, 132 insertions(+), 43 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/imx6dl-plym2m.dts b/arch/arm/boot/dts/imx6dl-plym2m.dts
> index 60fe5f14666e..73c7622bfe0f 100644
> --- a/arch/arm/boot/dts/imx6dl-plym2m.dts
> +++ b/arch/arm/boot/dts/imx6dl-plym2m.dts
> @@ -101,6 +101,18 @@ reg_12v0: regulator-12v0 {
>  		regulator-min-microvolt = <12000000>;
>  		regulator-max-microvolt = <12000000>;
>  	};
> +
> +	touchscreen {
> +		compatible = "resistive-adc-touch";
> +		io-channels = <&adc_ts 1>, <&adc_ts 3>, <&adc_ts 4>,
> +                              <&adc_ts 5>;
> +		io-channel-names = "y", "z1", "z2", "x";
> +		touchscreen-min-pressure = <64687>;
> +		touchscreen-inverted-x;
> +		touchscreen-inverted-y;
> +		touchscreen-x-plate-ohms = <300>;
> +		touchscreen-y-plate-ohms = <800>;
> +	};
>  };
>  
>  &can1 {
> @@ -129,26 +141,41 @@ &ecspi2 {
>  	pinctrl-0 = <&pinctrl_ecspi2>;
>  	status = "okay";
>  
> -	touchscreen@0 {
> -		compatible = "ti,tsc2046";
> +	adc_ts: adc@0 {
> +		compatible = "ti,tsc2046e-adc";
>  		reg = <0>;
>  		pinctrl-0 = <&pinctrl_tsc2046>;
>  		pinctrl-names ="default";
> -		spi-max-frequency = <100000>;
> -		interrupts-extended = <&gpio3 20 IRQ_TYPE_EDGE_FALLING>;
> -		pendown-gpio = <&gpio3 20 GPIO_ACTIVE_LOW>;
> +		spi-max-frequency = <1000000>;
> +		interrupts-extended = <&gpio3 20 IRQ_TYPE_LEVEL_LOW>;
> +		#io-channel-cells = <1>;

I quickly skimmed the patch - we seem to loose the pendown-gpio in most
of the patches - I do not see it replaced.

	Sam

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