[PATCH 2/2] arm64: dts: rockchip: Add Powkiddy RGB20SX

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

The Powkiddy RGB20SX is a portable game console extremely similar to
the existing RGB30 console. The key differences from the RGB30 are
as follows:

 - Realtek RTW8723DS WiFi and Bluetooth.
 - UART pads for debug console (UART2).
 - A function button (ADC channel 0).
 - A much larger battery (5000 mAh).

Otherwise, the device is identical to the RGB30, including the
hard-coded value on ADC channel 1 used to identify the device at
runtime.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 arch/arm64/boot/dts/rockchip/Makefile         |  1 +
 .../dts/rockchip/rk3566-powkiddy-rgb20sx.dts  | 89 +++++++++++++++++++
 2 files changed, 90 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb20sx.dts

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index 09423070c992..8021e5190ece 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -91,6 +91,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinenote-v1.2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinetab2-v0.1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinetab2-v2.0.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-powkiddy-rgb10max3.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-powkiddy-rgb20sx.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-powkiddy-rgb30.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-powkiddy-rk2023.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-powkiddy-x55.dtb
diff --git a/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb20sx.dts b/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb20sx.dts
new file mode 100644
index 000000000000..9b70026ce4a5
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3566-powkiddy-rgb20sx.dts
@@ -0,0 +1,89 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/linux-event-codes.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include "rk3566-powkiddy-rk2023.dtsi"
+
+/ {
+	model = "Powkiddy RGB20SX";
+	compatible = "powkiddy,rgb20sx", "rockchip,rk3566";
+
+	chosen: chosen {
+		stdout-path = "serial2:1500000n8";
+	};
+
+	adc_keys: adc-keys {
+		compatible = "adc-keys";
+		io-channels = <&saradc 0>;
+		io-channel-names = "buttons";
+		keyup-threshold-microvolt = <1800000>;
+		poll-interval = <60>;
+
+		/*
+		 * Button is labelled as FN, but according to input
+		 * guidelines it should be mode.
+		 */
+		button-mode {
+			label = "MODE";
+			linux,code = <BTN_MODE>;
+			press-threshold-microvolt = <1750>;
+		};
+	};
+};
+
+&battery {
+	charge-full-design-microamp-hours = <5000000>;
+};
+
+&bluetooth {
+	compatible = "realtek,rtl8723ds-bt";
+};
+
+&cru {
+	assigned-clocks = <&pmucru CLK_RTC_32K>, <&cru PLL_GPLL>,
+			  <&pmucru PLL_PPLL>, <&cru PLL_VPLL>;
+	assigned-clock-rates = <32768>, <1200000000>,
+			       <200000000>, <292500000>;
+};
+
+&dsi0 {
+	panel: panel@0 {
+		compatible = "powkiddy,rgb30-panel";
+		reg = <0>;
+		backlight = <&backlight>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&lcd_rst>;
+		reset-gpios = <&gpio4 RK_PA0 GPIO_ACTIVE_LOW>;
+		vcc-supply = <&vcc3v3_lcd0_n>;
+		iovcc-supply = <&vcc3v3_lcd0_n>;
+
+		port {
+			mipi_in_panel: endpoint {
+				remote-endpoint = <&mipi_out_panel>;
+			};
+		};
+	};
+};
+
+&i2c0 {
+	vdd_cpu: regulator@1c {
+		compatible = "tcs,tcs4525";
+		reg = <0x1c>;
+		fcs,suspend-voltage-selector = <1>;
+		regulator-min-microvolt = <712500>;
+		regulator-max-microvolt = <1390000>;
+		regulator-name = "vdd_cpu";
+		regulator-ramp-delay = <2300>;
+		vin-supply = <&vcc_sys>;
+		regulator-state-mem {
+			regulator-off-in-suspend;
+		};
+	};
+};
+
+&uart2 {
+	status = "okay";
+};
-- 
2.43.0