From: Robin Murphy <robin.murphy@arm.com>
Date: Fri, 23 Jan 2026 19:22:23 +0000 (+0000)
Subject: arm64: dts: rockchip: Add overlay for FriendlyElec HD702E
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=25afddad23b8e91fcff625756e51a805e288ab38;p=thirdparty%2Fkernel%2Flinux.git

arm64: dts: rockchip: Add overlay for FriendlyElec HD702E

Add an overlay to support FriendlyElec's HD702E 7" eDP LCD touchscreen
module for the NanoPC-T4 board:

https://www.friendlyelec.com/index.php?route=product/product&path=81&product_id=230

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Link: https://patch.msgid.link/2bbc2e62ae9b54ac7594355001ce2b15885d3493.1769191673.git.robin.murphy@arm.com
[changed edp-panel auxbus node to panel to conform to the binding]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index 89c168a651b62..a9fc5135f1b81 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -63,6 +63,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-khadas-edge-v.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-kobol-helios64.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-leez-p710.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopc-t4.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopc-t4-hd702e.dtbo
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-m4.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-m4b.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopi-neo4.dtb
@@ -249,6 +250,10 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-ringneck-haikou-haikou-video-demo.dtb
 px30-ringneck-haikou-haikou-video-demo-dtbs := px30-ringneck-haikou.dtb \
 	px30-ringneck-haikou-video-demo.dtbo
 
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-nanopc-t4-hd702e.dtb
+rk3399-nanopc-t4-hd702e-dtbs := rk3399-nanopc-t4.dtb \
+	rk3399-nanopc-t4-hd702e.dtbo
+
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3368-lion-haikou-haikou-video-demo.dtb
 rk3368-lion-haikou-haikou-video-demo-dtbs := rk3368-lion-haikou.dtb \
 	rk3368-lion-haikou-video-demo.dtbo
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4-hd702e.dtso b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4-hd702e.dtso
new file mode 100644
index 0000000000000..766925b635717
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopc-t4-hd702e.dtso
@@ -0,0 +1,96 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * FriendlyElec HD702E LCD on NanoPC-T4 board
+ */
+
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+
+&{/} {
+	vdd_3_3v: regulator-vdd_3_3v {
+		compatible = "regulator-fixed";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		regulator-name = "vdd_3.3v";
+		vin-supply = <&vcc12v0_sys>;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		pwms = <&pwm0 0 25000 0>;
+		enable-gpios = <&gpio4 RK_PD5 GPIO_ACTIVE_HIGH>;
+		brightness-levels = <0 255>;
+		default-brightness-level = <200>;
+		num-interpolated-steps = <255>;
+		pinctrl-0 = <&bl_en>;
+		pinctrl-names = "default";
+	};
+};
+
+&edp {
+	force-hpd;
+	status = "okay";
+
+	aux-bus {
+		panel {
+			compatible = "friendlyarm,hd702e";
+			backlight = <&backlight>;
+			no-hpd;
+			power-supply = <&vdd_3_3v>;
+
+			port {
+				panel_in_edp: endpoint {
+					remote-endpoint = <&edp_out_panel>;
+				};
+			};
+		};
+	};
+};
+
+&edp_out {
+	edp_out_panel: endpoint {
+		remote-endpoint = <&panel_in_edp>;
+	};
+};
+
+&i2c4 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	touchscreen@5d {
+		compatible = "goodix,gt9271";
+		reg = <0x5d>;
+		interrupt-parent = <&gpio1>;
+		interrupts = <RK_PC4 IRQ_TYPE_EDGE_FALLING>;
+		irq-gpios = <&gpio1 RK_PC4 GPIO_ACTIVE_HIGH>;
+		reset-gpios = <&gpio1 RK_PB5 GPIO_ACTIVE_HIGH>;
+		pinctrl-0 = <&touch_int &touch_rst>;
+		pinctrl-names = "default";
+		AVDD28-supply = <&vdd_3_3v>;
+		VDDIO-supply = <&vdd_3_3v>;
+	};
+};
+
+&pinctrl {
+	backlight {
+		bl_en: bl-en {
+			rockchip,pins = <4 RK_PD5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	touchscreen {
+		touch_int: touch-int {
+			rockchip,pins = <1 RK_PC4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		touch_rst: touch-rst {
+			rockchip,pins = <1 RK_PB5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};