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arm64: dts: imx8mp-kontron: Fix touch reset configuration on DL devices

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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: 946ab10e3f ("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>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
This commit is contained in:
Frieder Schrempf 2026-02-20 11:36:16 +01:00 committed by Frank Li
parent a251f9ed77
commit 058c53476d
1 changed files with 19 additions and 0 deletions
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19
arch/arm64/boot/dts/freescale/imx8mp-kontron-dl.dtso
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@ -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
>;
};
};