arm64: dts: rockchip: add Anbernic RG353P and RG503

Anbernic RG353P and RG503 are both RK3566 based handheld gaming devices
from Anbernic.

Both devices have:
 - 2 SDMMC slots.
 - A Realtek rtl8821cs WiFi/Bluetooth adapter.
 - A mini HDMI port.
 - A USB C host port and a USB C otg port (currently only working as
   device).
 - Multiple GPIO buttons and a single ADC button.
 - Dual analog joysticks controlled via a GPIO mux.
 - A headphone jack with amplified stereo speakers via a SGM4865 amp.
 - A PWM based vibrator for force feedback.

The RG353P has:
 - 2GB LPDDR4 RAM.
 - A 32GB eMMC.
 - A 3.5 inch 640x480 4-lane DSI panel of unknown origin with an i2c
   controlled touchscreen (touchscreen is a Hynitron CST340).

The RG503 has:
 - 1GB LPDDR4 RAM.
 - A 5 inch 960x544 AMOLED 2-lane DSI/DBI panel manufactured by Samsung
   with part number ams495qa04. Data for this panel is provided via the
   DSI interface, however commands are sent via a 9-bit 3-wire SPI
   interface. The MISO pin of SPI3 of the SOC is wired to the input of
   the panel, so it must be bitbanged.

This devicetree enables the following hardware:
 - HDMI (plus audio).
 - Analog audio, including speakers.
 - All buttons.
 - All SDMMC/eMMC/SDIO controllers.
 - The ADC joysticks (note a pending patch is required to use them).
 - WiFi/Bluetooth (note out of tree drivers are required).
 - The PWM based vibrator motor.

The following hardware is not enabled:
 - The display panels (drivers are being written and there are issues
   with the upstream DSI and VOP2 subsystems).
 - Battery (driver pending).
 - Touchscreen on the RG353P (note the i2c2 bus is enabled for it).
Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Link: https://lore.kernel.org/r/20220906210324.28986-4-macroalpha82@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/Makefile

@@ -60,6 +60,8 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-rockpro64.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-sapphire-excavator.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399pro-rock-pi-n10.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-anbernic-rg353p.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-anbernic-rg503.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinenote-v1.1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-pinenote-v1.2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3566-quartz64-a.dtb

arch/arm64/boot/dts/rockchip/rk3566-anbernic-rg353p.dts

+// 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-anbernic-rgxx3.dtsi"
+
+/ {
+	model = "RG353P";
+	compatible = "anbernic,rg353p", "rockchip,rk3566";
+
+	aliases {
+		mmc0 = &sdhci;
+		mmc1 = &sdmmc0;
+		mmc2 = &sdmmc1;
+		mmc3 = &sdmmc2;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		power-supply = <&vcc_sys>;
+		pwms = <&pwm4 0 25000 0>;
+	};
+};
+
+&gpio_keys_control {
+	button-a {
+		gpios = <&gpio3 RK_PC2 GPIO_ACTIVE_LOW>;
+		label = "EAST";
+		linux,code = <BTN_EAST>;
+	};
+
+	button-left {
+		gpios = <&gpio3 RK_PA6 GPIO_ACTIVE_LOW>;
+		label = "DPAD-LEFT";
+		linux,code = <BTN_DPAD_LEFT>;
+	};
+
+	button-r1 {
+		gpios = <&gpio3 RK_PB4 GPIO_ACTIVE_LOW>;
+		label = "TR";
+		linux,code = <BTN_TR>;
+	};
+
+	button-r2 {
+		gpios = <&gpio3 RK_PB3 GPIO_ACTIVE_LOW>;
+		label = "TR2";
+		linux,code = <BTN_TR2>;
+	};
+
+	button-right {
+		gpios = <&gpio3 RK_PA5 GPIO_ACTIVE_LOW>;
+		label = "DPAD-RIGHT";
+		linux,code = <BTN_DPAD_RIGHT>;
+	};
+
+	button-y {
+		gpios = <&gpio3 RK_PC1 GPIO_ACTIVE_LOW>;
+		label = "WEST";
+		linux,code = <BTN_WEST>;
+	};
+};
+
+&i2c0 {
+	/* This hardware is physically present but unused. */
+	power-monitor@62 {
+		compatible = "cellwise,cw2015";
+		reg = <0x62>;
+		status = "disabled";
+	};
+};
+
+&i2c2 {
+	pintctrl-names = "default";
+	pinctrl-0 = <&i2c2m1_xfer>;
+	status = "okay";
+};
+
+&pwm4 {
+	status = "okay";
+};
+
+&sdhci {
+	pinctrl-0 = <&emmc_bus8>, <&emmc_clk>, <&emmc_cmd>, <&emmc_datastrobe>, <&emmc_rstnout>;
+	pinctrl-names = "default";
+	bus-width = <8>;
+	mmc-hs200-1_8v;
+	non-removable;
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_1v8>;
+	status = "okay";
+};

arch/arm64/boot/dts/rockchip/rk3566-anbernic-rg503.dts

+// 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-anbernic-rgxx3.dtsi"
+
+/ {
+	model = "RG503";
+	compatible = "anbernic,rg503", "rockchip,rk3566";
+
+	aliases {
+		mmc0 = &sdmmc0;
+		mmc1 = &sdmmc1;
+		mmc2 = &sdmmc2;
+	};
+
+	gpio_spi: spi {
+		compatible = "spi-gpio";
+		pinctrl-names = "default";
+		pinctrl-0 = <&spi_pins>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		sck-gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
+		mosi-gpios = <&gpio4 RK_PB0 GPIO_ACTIVE_HIGH>;
+		cs-gpios = <&gpio4 RK_PA7 GPIO_ACTIVE_HIGH>;
+		num-chipselects = <0>;
+	};
+};
+
+&gpio_keys_control {
+	button-a {
+		gpios = <&gpio3 RK_PC1 GPIO_ACTIVE_LOW>;
+		label = "EAST";
+		linux,code = <BTN_EAST>;
+	};
+
+	button-left {
+		gpios = <&gpio3 RK_PA5 GPIO_ACTIVE_LOW>;
+		label = "DPAD-LEFT";
+		linux,code = <BTN_DPAD_LEFT>;
+	};
+
+	button-right {
+		gpios = <&gpio3 RK_PA6 GPIO_ACTIVE_LOW>;
+		label = "DPAD-RIGHT";
+		linux,code = <BTN_DPAD_RIGHT>;
+	};
+
+	button-r1 {
+		gpios = <&gpio3 RK_PB3 GPIO_ACTIVE_LOW>;
+		label = "TR";
+		linux,code = <BTN_TR>;
+	};
+
+	button-r2 {
+		gpios = <&gpio3 RK_PB4 GPIO_ACTIVE_LOW>;
+		label = "TR2";
+		linux,code = <BTN_TR2>;
+	};
+
+	button-right {
+		gpios = <&gpio3 RK_PA6 GPIO_ACTIVE_LOW>;
+		label = "DPAD-RIGHT";
+		linux,code = <BTN_DPAD_RIGHT>;
+	};
+
+	button-y {
+		gpios = <&gpio3 RK_PC2 GPIO_ACTIVE_LOW>;
+		label = "WEST";
+		linux,code = <BTN_WEST>;
+	};
+};
+
+&pinctrl {
+	gpio-spi {
+		spi_pins: spi-pins {
+			rockchip,pins =
+				<4 RK_PA7 RK_FUNC_GPIO &pcfg_pull_none>,
+				<4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>,
+				<4 RK_PB3 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};