[PATCH 3/3] ARM: dts: imx50-kobo-aura: Enable eKTF2132 touchscreen

[Shawn Guo]

On Fri, Nov 06, 2020 at 12:24:12PM +0100, Jonathan Neuschäfer wrote:
> The Kobo Aura has an eKTF2132 touchscreen controller.
> 
> Although the vendor kernel toggles a reset pin (GPIO5-12) during the
> startup sequence, the touchscreen works without it.
> 
> Signed-off-by: Jonathan Neuschäfer <j.neuschaefer at gmx.net>
> ---
> 
> This patch requires "[PATCH] ARM: dts: imx50-kobo-aura: Add 'grp' suffix
> to pinctrl node names" in order to apply cleanly.
> (https://lore.kernel.org/lkml/20201031210729.2804471-1-j.neuschaefer@gmx.net/)
> ---
>  arch/arm/boot/dts/imx50-kobo-aura.dts | 16 +++++++++++++++-
>  1 file changed, 15 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/imx50-kobo-aura.dts b/arch/arm/boot/dts/imx50-kobo-aura.dts
> index b2fbee60271f2..82ce8c43be867 100644
> --- a/arch/arm/boot/dts/imx50-kobo-aura.dts
> +++ b/arch/arm/boot/dts/imx50-kobo-aura.dts
> @@ -120,7 +120,14 @@ &i2c1 {
>  	pinctrl-0 = <&pinctrl_i2c1>;
>  	status = "okay";
> 
> -	/* TODO: ektf2132 touch controller at 0x15 */
> +	touchscreen at 15 {
> +		reg = <0x15>;
> +		compatible = "elan,ektf2132";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_ts>;
> +		power-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>;
> +		interrupts-extended = <&gpio5 13 IRQ_TYPE_EDGE_FALLING>;

It needs include of <dt-bindings/interrupt-controller/irq.h>.

  DTC     arch/arm/boot/dts/imx50-kobo-aura.dtb
Error: ../arch/arm/boot/dts/imx50-kobo-aura.dts:128.36-37 syntax error
FATAL ERROR: Unable to parse input tree
scripts/Makefile.lib:326: recipe for target 'arch/arm/boot/dts/imx50-kobo-aura.dtb' failed
make[2]: *** [arch/arm/boot/dts/imx50-kobo-aura.dtb] Error 1

Patch dropped.

Shawn

> +	};
>  };
> 
>  &i2c2 {
> @@ -240,6 +247,13 @@ MX50_PAD_SD3_D7__ESDHC3_DAT7		0x1d4
>  		>;
>  	};
> 
> +	pinctrl_ts: tsgrp {
> +		fsl,pins = <
> +			MX50_PAD_CSPI_MOSI__GPIO4_9		0x0
> +			MX50_PAD_SD2_D5__GPIO5_13		0x0
> +		>;
> +	};
> +
>  	pinctrl_uart2: uart2grp {
>  		fsl,pins = <
>  			MX50_PAD_UART2_TXD__UART2_TXD_MUX	0x1e4
> --
> 2.28.0
>