arm64: dts: ti: k3-am62-verdin: Add RPi Touch Display 2 7-inch

Add a device tree overlay for the Raspberry Pi Touch Display 2 7" on
the Verdin DSI_1 interface.

Link: https://www.raspberrypi.com/products/touch-display-2/
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Link: https://patch.msgid.link/20260715055446.31139-1-francesco@dolcini.it
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

2 files changed, 106 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 448fcdeb408b..1fbcc0efdafb 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -52,6 +52,7 @@ dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-10inch-dsi.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-10inch-lvds.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-10inch-lvds-v2.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-panel-cap-touch-7inch-dsi.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-rpi-display-2-7in.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-uart4-mcu.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia-dsi-to-hdmi.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am625-verdin-wifi-dahlia-panel-cap-touch-10inch-dsi.dtb
@@ -272,6 +273,9 @@ k3-am625-verdin-wifi-dev-ov5640-dtbs := k3-am625-verdin-wifi-dev.dtb \
 k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi-dtbs := \
 	k3-am625-verdin-wifi-dev.dtb \
 	k3-am625-verdin-panel-cap-touch-7inch-dsi.dtbo
+k3-am625-verdin-wifi-dev-rpi-display-2-7in-dtbs := \
+	k3-am625-verdin-wifi-dev.dtb \
+	k3-am625-verdin-rpi-display-2-7in.dtbo
 k3-am625-verdin-wifi-dev-uart4-mcu-dtbs := k3-am625-verdin-wifi-dev.dtb \
 	k3-am625-verdin-uart4-mcu.dtbo
 k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds-dtbs := \
@@ -410,6 +414,7 @@ dtb- += k3-am625-beagleplay-csi2-ov5640.dtb \
 	k3-am625-verdin-wifi-dev-ov5640-24mhz.dtb \
 	k3-am625-verdin-wifi-dev-ov5640.dtb \
 	k3-am625-verdin-wifi-dev-panel-cap-touch-7inch-dsi.dtb \
+	k3-am625-verdin-wifi-dev-rpi-display-2-7in.dtb \
 	k3-am625-verdin-wifi-dev-uart4-mcu.dtb \
 	k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds.dtb \
 	k3-am625-verdin-wifi-mallow-panel-cap-touch-10inch-lvds-v2.dtb \
diff --git a/arch/arm64/boot/dts/ti/k3-am625-verdin-rpi-display-2-7in.dtso b/arch/arm64/boot/dts/ti/k3-am625-verdin-rpi-display-2-7in.dtso
new file mode 100644
index 000000000000..8366bebbd5d2
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am625-verdin-rpi-display-2-7in.dtso
@@ -0,0 +1,101 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) Toradex
+ *
+ * Raspberry Pi Touch Display 2 7" on Verdin DSI_1 and I2C_2_DSI
+ *
+ * https://www.raspberrypi.com/products/touch-display-2/
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+
+&{/} {
+	backlight_rpi: backlight-rpi-display {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 31>;
+		default-brightness-level = <15>;
+		num-interpolated-steps = <31>;
+		pwms = <&mcu_display_rpi 0 200000 0>;
+	};
+
+	reg_display_rpi: regulator-rpi-display {
+		compatible = "regulator-fixed";
+		regulator-max-microvolt = <5000000>;
+		regulator-min-microvolt = <5000000>;
+		regulator-name = "rpi-display";
+	};
+
+	reg_display_rpi_touch: regulator-rpi-display-touch {
+		compatible = "regulator-fixed";
+		gpio = <&mcu_display_rpi 1 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		regulator-max-microvolt = <3300000>;
+		regulator-min-microvolt = <3300000>;
+		regulator-name = "rpi-display-touch";
+		startup-delay-us = <50000>;
+	};
+
+};
+
+/* Verdin I2C_2_DSI */
+&main_i2c2 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	mcu_display_rpi: regulator@45 {
+		compatible = "raspberrypi,touchscreen-panel-regulator-v2";
+		reg = <0x45>;
+		#gpio-cells = <2>;
+		#pwm-cells = <3>;
+		gpio-controller;
+	};
+
+	touchscreen@5d {
+		compatible = "goodix,gt911";
+		reg = <0x5d>;
+		AVDD28-supply = <&reg_display_rpi_touch>;
+		touchscreen-size-x = <720>;
+		touchscreen-size-y = <1280>;
+	};
+};
+
+&dsi_bridge {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	status = "okay";
+
+	panel@0 {
+		compatible = "raspberrypi,dsi-7inch", "ilitek,ili9881c";
+		reg = <0>;
+		backlight = <&backlight_rpi>;
+		power-supply = <&reg_display_rpi>;
+		reset-gpios = <&mcu_display_rpi 0 GPIO_ACTIVE_LOW>;
+
+		port {
+			dsi_panel_in: endpoint {
+				remote-endpoint = <&dsi_bridge_out>;
+			};
+		};
+	};
+};
+
+&dsi_bridge_ports {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	port@1 {
+		reg = <1>;
+
+		dsi_bridge_out: endpoint {
+			remote-endpoint = <&dsi_panel_in>;
+		};
+	};
+};
+
+&dss {
+	status = "okay";
+};