From: Yannick Fertre <yannick.fertre@foss.st.com>
Date: Mon, 6 May 2024 14:49:45 +0000 (+0200)
Subject: ARM: dts: stm32: add goodix touchscreen on stm32mp135f-dk
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=3d058df954ebdb592fd421e0005f6d0c25da21ed;p=users%2Fjedix%2Flinux-maple.git

ARM: dts: stm32: add goodix touchscreen on stm32mp135f-dk

Touchscreen reset needs to be configured
via the pinctrl not the driver (a pull-down resistor
has been soldered onto the reset line which forces
the touchscreen to reset state).
Interrupt line must have a pull-down resistor
in order to freeze the i2c address at 0x5D.

Signed-off-by: Yannick Fertre <yannick.fertre@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
---

diff --git a/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi b/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
index b423d182aefd3..66efef93251f6 100644
--- a/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
@@ -46,6 +46,28 @@
 		};
 	};
 
+	goodix_pins_a: goodix-0 {
+		/*
+		 * touchscreen reset needs to be configured
+		 * via the pinctrl not the driver (a pull-down resistor
+		 * has been soldered onto the reset line which forces
+		 * the touchscreen to reset state).
+		 */
+		pins1 {
+			pinmux = <STM32_PINMUX('H', 2, GPIO)>;
+			output-high;
+			bias-pull-up;
+		};
+		/*
+		 * Interrupt line must have a pull-down resistor
+		 * in order to freeze the i2c address at 0x5D
+		 */
+		pins2 {
+			pinmux = <STM32_PINMUX('F', 5, GPIO)>;
+			bias-pull-down;
+		};
+	};
+
 	i2c1_pins_a: i2c1-0 {
 		pins {
 			pinmux = <STM32_PINMUX('D', 12, AF5)>, /* I2C1_SCL */
diff --git a/arch/arm/boot/dts/st/stm32mp135f-dk.dts b/arch/arm/boot/dts/st/stm32mp135f-dk.dts
index e43bb9b74b87c..970de441fbaad 100644
--- a/arch/arm/boot/dts/st/stm32mp135f-dk.dts
+++ b/arch/arm/boot/dts/st/stm32mp135f-dk.dts
@@ -288,6 +288,20 @@
 			};
 		};
 	};
+
+	goodix: goodix-ts@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&goodix_pins_a>;
+		interrupt-parent = <&gpiof>;
+		interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
+		AVDD28-supply = <&scmi_v3v3_sw>;
+		VDDIO-supply = <&scmi_v3v3_sw>;
+		touchscreen-size-x = <480>;
+		touchscreen-size-y = <272>;
+		status = "okay" ;
+	};
 };
 
 &iwdg2 {