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

[Frieder Schrempf]

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>
---
 .../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