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 <o.rempel@xxxxxxxxxxxxxx>
> ---
> 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
