[PATCH 1/4] arm64: dts: imx8mp-kontron: Fix touch reset configuration on DL devices

[Frank Li]

On Wed, Feb 18, 2026 at 02:25:05PM +0100, Frieder Schrempf wrote:
> From: Frieder Schrempf <frieder.schrempf at kontron.de>
>
> The reset signal needs a pullup, but there is no hardware pullup.
> As a workaround, enable the internal pullup to fix the touchscreen.
>
> As this deviates from the default generic GPIO settings in the OSM
> devicetree, add a new node for the touch pinctrl and redefine the
> generic gpio1 pinctrl.
>
> Fixes: 946ab10e3f40f ("arm64: dts: Add support for Kontron OSM-S i.MX8MP SoM and BL carrier board")
> Signed-off-by: Frieder Schrempf <frieder.schrempf at kontron.de>
> ---

Reviewed-by: Frank Li <Frank.Li at nxp.com>

>  .../boot/dts/freescale/imx8mp-kontron-dl.dtso | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-kontron-dl.dtso b/arch/arm64/boot/dts/freescale/imx8mp-kontron-dl.dtso
> index a3cba41d2b531..7131e9a499ae1 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp-kontron-dl.dtso
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-kontron-dl.dtso
> @@ -77,6 +77,8 @@ &i2c1 {
>  	touchscreen at 5d {
>  		compatible = "goodix,gt928";
>  		reg = <0x5d>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_touch>;
>  		interrupt-parent = <&gpio1>;
>  		interrupts = <6 8>;
>  		irq-gpios = <&gpio1 6 0>;
> @@ -98,6 +100,16 @@ &lvds_bridge {
>  	status = "okay";
>  };
>
> +/* redefine to remove touch controller GPIOs */
> +&pinctrl_gpio1 {
> +	fsl,pins = <
> +		MX8MP_IOMUXC_GPIO1_IO00__GPIO1_IO00		0x19 /* GPIO_A_0 */
> +		MX8MP_IOMUXC_GPIO1_IO01__GPIO1_IO01		0x19 /* GPIO_A_1 */
> +		MX8MP_IOMUXC_GPIO1_IO05__GPIO1_IO05		0x19 /* GPIO_A_2 */
> +		MX8MP_IOMUXC_GPIO1_IO08__GPIO1_IO08		0x19 /* GPIO_A_5 */
> +	>;
> +};
> +
>  &pwm1 {
>  	status = "okay";
>  };
> @@ -108,4 +120,11 @@ pinctrl_panel_stby: panelstbygrp {
>  			MX8MP_IOMUXC_SAI3_RXFS__GPIO4_IO28		0x19
>  		>;
>  	};
> +
> +	pinctrl_touch: touchgrp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_GPIO1_IO06__GPIO1_IO06		0x19
> +			MX8MP_IOMUXC_GPIO1_IO07__GPIO1_IO07		0x150
> +		>;
> +	};
>  };
> --
> 2.52.0
>