On Wed, Feb 18, 2026 at 02:25:05PM +0100, Frieder Schrempf wrote:
> From: Frieder Schrempf <frieder.schrempf@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@kontron.de>
> ---
Reviewed-by: Frank Li <Frank.Li@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@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
>