[PATCH] board: rockchip: add Anbernic RGXX3 Series Devices
Chris Morgan
macroalpha82 at gmail.com
Thu Mar 16 18:46:05 CET 2023
From: Chris Morgan <macromorgan at hotmail.com>
The Anbernic RGxx3 is a "pseudo-device" that encompasses the following
devices:
- Anbernic RG353M
- Anbernic RG353P
- Anbernic RG353V
- Anbernic RG353VS
- Anbernic RG503
The rk3566-anbernic-rgxx3.dtsi is synced with upstream Linux, but
rk3566-anbernic-rgxx3.dts is a U-Boot specific devicetree that
is used for all RGxx3 devices.
Via the board.c file, the bootloader automatically sets the correct
fdtfile, board, and board_name environment variables so that the
correct devicetree can be passed to Linux. It is also possible to
simply hard-code a single devicetree in the boot.scr file and use
that to load Linux as well.
The common specifications for each device are:
- Rockchip RK3566 SoC
- 2 external SDMMC slots
- 1 USB-C host port, 1 USB-C peripheral port
- 1 mini-HDMI output
- MIPI-DSI based display panel
- ADC controlled joysticks with a GPIO mux
- GPIO buttons
- A PWM controlled vibrator
- An ADC controlled button
All of the common features are defined in the devicetree synced from
upstream Linux.
TODO: DSI panel auto-detection for the RG353 devices (requires porting
of DSI controller driver and DSI-DPHY driver to send DSI commands to
the panel).
Signed-off-by: Chris Morgan <macromorgan at hotmail.com>
---
arch/arm/dts/Makefile | 1 +
.../arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi | 85 ++
arch/arm/dts/rk3566-anbernic-rgxx3.dts | 18 +
arch/arm/dts/rk3566-anbernic-rgxx3.dtsi | 786 ++++++++++++++++++
arch/arm/mach-rockchip/rk3568/Kconfig | 14 +
board/anbernic/rgxx3_rk3566/Kconfig | 15 +
board/anbernic/rgxx3_rk3566/MAINTAINERS | 6 +
board/anbernic/rgxx3_rk3566/Makefile | 6 +
board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c | 203 +++++
configs/anbernic-rgxx3_defconfig | 78 ++
doc/board/anbernic/index.rst | 9 +
doc/board/anbernic/rgxx3.rst | 47 ++
doc/board/index.rst | 1 +
doc/board/rockchip/rockchip.rst | 3 +
include/configs/anbernic-rgxx3-rk3566.h | 12 +
15 files changed, 1284 insertions(+)
create mode 100644 arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
create mode 100644 arch/arm/dts/rk3566-anbernic-rgxx3.dts
create mode 100644 arch/arm/dts/rk3566-anbernic-rgxx3.dtsi
create mode 100644 board/anbernic/rgxx3_rk3566/Kconfig
create mode 100644 board/anbernic/rgxx3_rk3566/MAINTAINERS
create mode 100644 board/anbernic/rgxx3_rk3566/Makefile
create mode 100644 board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
create mode 100644 configs/anbernic-rgxx3_defconfig
create mode 100644 doc/board/anbernic/index.rst
create mode 100644 doc/board/anbernic/rgxx3.rst
create mode 100644 include/configs/anbernic-rgxx3-rk3566.h
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index c160e884bf..74dd55f700 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -165,6 +165,7 @@ dtb-$(CONFIG_ROCKCHIP_RK3399) += \
rk3399pro-rock-pi-n10.dtb
dtb-$(CONFIG_ROCKCHIP_RK3568) += \
+ rk3566-anbernic-rgxx3.dtb \
rk3568-evb.dtb \
rk3566-radxa-cm3-io.dtb \
rk3568-rock-3a.dtb
diff --git a/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
new file mode 100644
index 0000000000..2ae8186228
--- /dev/null
+++ b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk356x-u-boot.dtsi"
+
+/ {
+ chosen {
+ stdout-path = &uart2;
+ u-boot,spl-boot-order = "same-as-spl", &sdmmc1, &sdmmc0;
+ };
+
+ rng: rng at fe388000 {
+ compatible = "rockchip,cryptov2-rng";
+ reg = <0x0 0xfe388000 0x0 0x2000>;
+ status = "okay";
+ };
+};
+
+&cru {
+ assigned-clocks =
+ <&pmucru CLK_RTC_32K>,
+ <&pmucru PLL_PPLL>,
+ <&pmucru PCLK_PMU>, <&cru PLL_CPLL>,
+ <&cru PLL_GPLL>,
+ <&cru ACLK_BUS>, <&cru PCLK_BUS>,
+ <&cru ACLK_TOP_HIGH>, <&cru ACLK_TOP_LOW>,
+ <&cru HCLK_TOP>, <&cru PCLK_TOP>,
+ <&cru ACLK_PERIMID>, <&cru HCLK_PERIMID>,
+ <&cru CPLL_500M>, <&cru CPLL_333M>,
+ <&cru CPLL_250M>, <&cru CPLL_125M>,
+ <&cru CPLL_100M>, <&cru CPLL_62P5M>,
+ <&cru CPLL_50M>, <&cru CPLL_25M>;
+ assigned-clock-rates =
+ <32768>,
+ <200000000>,
+ <100000000>, <1000000000>,
+ <1188000000>,
+ <150000000>, <100000000>,
+ <500000000>, <400000000>,
+ <150000000>, <100000000>,
+ <300000000>, <150000000>,
+ <500000000>, <333333333>,
+ <250000000>, <125000000>,
+ <100000000>, <62500000>,
+ <50000000>, <25000000>;
+ assigned-clock-parents =
+ <&pmucru CLK_RTC32K_FRAC>;
+};
+
+&i2c2 {
+ status = "okay";
+};
+
+&pmucru {
+ assigned-clocks = <&pmucru SCLK_32K_IOE>;
+ assigned-clock-parents = <&pmucru CLK_RTC_32K>;
+};
+
+/*
+ * We don't need the clocks, but if they are present they may cause
+ * probing to fail so we remove them for U-Boot.
+ */
+&rk817 {
+ /delete-property/ assigned-clocks;
+ /delete-property/ assigned-clock-parents;
+ /delete-property/ clocks;
+ /delete-property/ clock-names;
+};
+
+&sdhci {
+ pinctrl-0 = <&emmc_bus8>, <&emmc_clk>, <&emmc_cmd>, <&emmc_datastrobe>, <&emmc_rstnout>;
+ pinctrl-names = "default";
+ bus-width = <8>;
+ max-frequency = <200000000>;
+ mmc-hs200-1_8v;
+ non-removable;
+ vmmc-supply = <&vcc_3v3>;
+ vqmmc-supply = <&vcc_1v8>;
+ status = "okay";
+};
+
+&uart2 {
+ clock-frequency = <24000000>;
+ u-boot,dm-spl;
+ status = "okay";
+};
diff --git a/arch/arm/dts/rk3566-anbernic-rgxx3.dts b/arch/arm/dts/rk3566-anbernic-rgxx3.dts
new file mode 100644
index 0000000000..404dddfafb
--- /dev/null
+++ b/arch/arm/dts/rk3566-anbernic-rgxx3.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+
+#include "rk3566-anbernic-rgxx3.dtsi"
+
+/ {
+
+/*
+ * Note this is a pseudo-model that doesn't exist in mainline Linux.
+ * This model is used for all RGXX3 devices and the board.c file will
+ * set the correct dtb name for loading mainline Linux automatically.
+ */
+ model = "RGXX3";
+ compatible = "anbernic,rg353m", "anbernic,rg353p",
+ "anbernic,rg353v", "anbernic,rg353vs",
+ "anbernic,rg503", "rockchip,rk3566";
+};
diff --git a/arch/arm/dts/rk3566-anbernic-rgxx3.dtsi b/arch/arm/dts/rk3566-anbernic-rgxx3.dtsi
new file mode 100644
index 0000000000..ad43fa199c
--- /dev/null
+++ b/arch/arm/dts/rk3566-anbernic-rgxx3.dtsi
@@ -0,0 +1,786 @@
+// 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/leds/common.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include <dt-bindings/soc/rockchip,vop2.h>
+#include "rk3566.dtsi"
+
+/ {
+ chosen: chosen {
+ stdout-path = "serial2:1500000n8";
+ };
+
+ adc-joystick {
+ compatible = "adc-joystick";
+ io-channels = <&adc_mux 0>,
+ <&adc_mux 1>,
+ <&adc_mux 2>,
+ <&adc_mux 3>;
+ pinctrl-0 = <&joy_mux_en>;
+ pinctrl-names = "default";
+ poll-interval = <60>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ axis at 0 {
+ reg = <0>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <1023 15>;
+ linux,code = <ABS_X>;
+ };
+
+ axis at 1 {
+ reg = <1>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <15 1023>;
+ linux,code = <ABS_RX>;
+ };
+
+ axis at 2 {
+ reg = <2>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <15 1023>;
+ linux,code = <ABS_Y>;
+ };
+
+ axis at 3 {
+ reg = <3>;
+ abs-flat = <32>;
+ abs-fuzz = <32>;
+ abs-range = <1023 15>;
+ linux,code = <ABS_RY>;
+ };
+ };
+
+ adc_keys: adc-keys {
+ compatible = "adc-keys";
+ io-channels = <&saradc 0>;
+ io-channel-names = "buttons";
+ keyup-threshold-microvolt = <1800000>;
+ poll-interval = <60>;
+
+ /*
+ * Button is mapped to F key in BSP kernel, but
+ * according to input guidelines it should be mode.
+ */
+ button-mode {
+ label = "MODE";
+ linux,code = <BTN_MODE>;
+ press-threshold-microvolt = <1750>;
+ };
+ };
+
+ adc_mux: adc-mux {
+ compatible = "io-channel-mux";
+ channels = "left_x", "right_x", "left_y", "right_y";
+ #io-channel-cells = <1>;
+ io-channels = <&saradc 3>;
+ io-channel-names = "parent";
+ mux-controls = <&gpio_mux>;
+ settle-time-us = <100>;
+ };
+
+ gpio_keys_control: gpio-keys-control {
+ compatible = "gpio-keys";
+ pinctrl-0 = <&btn_pins_ctrl>;
+ pinctrl-names = "default";
+
+ button-b {
+ gpios = <&gpio3 RK_PC3 GPIO_ACTIVE_LOW>;
+ label = "SOUTH";
+ linux,code = <BTN_SOUTH>;
+ };
+
+ button-down {
+ gpios = <&gpio3 RK_PA4 GPIO_ACTIVE_LOW>;
+ label = "DPAD-DOWN";
+ linux,code = <BTN_DPAD_DOWN>;
+ };
+
+ button-l1 {
+ gpios = <&gpio3 RK_PB1 GPIO_ACTIVE_LOW>;
+ label = "TL";
+ linux,code = <BTN_TL>;
+ };
+
+ button-l2 {
+ gpios = <&gpio3 RK_PB2 GPIO_ACTIVE_LOW>;
+ label = "TL2";
+ linux,code = <BTN_TL2>;
+ };
+
+ button-select {
+ gpios = <&gpio3 RK_PB6 GPIO_ACTIVE_LOW>;
+ label = "SELECT";
+ linux,code = <BTN_SELECT>;
+ };
+
+ button-start {
+ gpios = <&gpio3 RK_PB5 GPIO_ACTIVE_LOW>;
+ label = "START";
+ linux,code = <BTN_START>;
+ };
+
+ button-thumbl {
+ gpios = <&gpio3 RK_PA1 GPIO_ACTIVE_LOW>;
+ label = "THUMBL";
+ linux,code = <BTN_THUMBL>;
+ };
+
+ button-thumbr {
+ gpios = <&gpio3 RK_PA2 GPIO_ACTIVE_LOW>;
+ label = "THUMBR";
+ linux,code = <BTN_THUMBR>;
+ };
+
+ button-up {
+ gpios = <&gpio3 RK_PA3 GPIO_ACTIVE_LOW>;
+ label = "DPAD-UP";
+ linux,code = <BTN_DPAD_UP>;
+ };
+
+ button-x {
+ gpios = <&gpio3 RK_PC0 GPIO_ACTIVE_LOW>;
+ label = "NORTH";
+ linux,code = <BTN_NORTH>;
+ };
+ };
+
+ gpio_keys_vol: gpio-keys-vol {
+ compatible = "gpio-keys";
+ autorepeat;
+ pinctrl-0 = <&btn_pins_vol>;
+ pinctrl-names = "default";
+
+ button-vol-down {
+ gpios = <&gpio3 RK_PB0 GPIO_ACTIVE_LOW>;
+ label = "VOLUMEDOWN";
+ linux,code = <KEY_VOLUMEDOWN>;
+ };
+
+ button-vol-up {
+ gpios = <&gpio3 RK_PA7 GPIO_ACTIVE_LOW>;
+ label = "VOLUMEUP";
+ linux,code = <KEY_VOLUMEUP>;
+ };
+ };
+
+ gpio_mux: mux-controller {
+ compatible = "gpio-mux";
+ mux-gpios = <&gpio0 RK_PB6 GPIO_ACTIVE_LOW>,
+ <&gpio0 RK_PB7 GPIO_ACTIVE_LOW>;
+ #mux-control-cells = <0>;
+ };
+
+ hdmi-con {
+ compatible = "hdmi-connector";
+ ddc-i2c-bus = <&i2c5>;
+ type = "c";
+
+ port {
+ hdmi_con_in: endpoint {
+ remote-endpoint = <&hdmi_out_con>;
+ };
+ };
+ };
+
+ leds: gpio-leds {
+ compatible = "gpio-leds";
+ pinctrl-0 = <&led_pins>;
+ pinctrl-names = "default";
+
+ green_led: led-0 {
+ color = <LED_COLOR_ID_GREEN>;
+ default-state = "on";
+ function = LED_FUNCTION_POWER;
+ gpios = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+ };
+
+ amber_led: led-1 {
+ color = <LED_COLOR_ID_AMBER>;
+ function = LED_FUNCTION_CHARGING;
+ gpios = <&gpio0 RK_PC6 GPIO_ACTIVE_HIGH>;
+ retain-state-suspended;
+ };
+
+ red_led: led-2 {
+ color = <LED_COLOR_ID_RED>;
+ default-state = "off";
+ function = LED_FUNCTION_STATUS;
+ gpios = <&gpio0 RK_PC7 GPIO_ACTIVE_HIGH>;
+ };
+ };
+
+ sdio_pwrseq: sdio-pwrseq {
+ compatible = "mmc-pwrseq-simple";
+ clocks = <&rk817 1>;
+ clock-names = "ext_clock";
+ pinctrl-0 = <&wifi_enable_h>;
+ pinctrl-names = "default";
+ post-power-on-delay-ms = <200>;
+ reset-gpios = <&gpio4 RK_PA2 GPIO_ACTIVE_LOW>;
+ };
+
+ vcc3v3_lcd0_n: regulator-vcc3v3-lcd0 {
+ compatible = "regulator-fixed";
+ gpio = <&gpio0 RK_PC2 GPIO_ACTIVE_HIGH>;
+ enable-active-high;
+ pinctrl-0 = <&vcc_lcd_h>;
+ pinctrl-names = "default";
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc3v3_lcd0_n";
+ vin-supply = <&vcc_3v3>;
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vcc_sys: regulator-vcc-sys {
+ compatible = "regulator-fixed";
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3800000>;
+ regulator-max-microvolt = <3800000>;
+ regulator-name = "vcc_sys";
+ };
+
+ vcc_wifi: regulator-vcc-wifi {
+ compatible = "regulator-fixed";
+ enable-active-high;
+ gpio = <&gpio0 RK_PA0 GPIO_ACTIVE_HIGH>;
+ pinctrl-0 = <&vcc_wifi_h>;
+ pinctrl-names = "default";
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc_wifi";
+ };
+
+ vibrator: pwm-vibrator {
+ compatible = "pwm-vibrator";
+ pwm-names = "enable";
+ pwms = <&pwm5 0 1000000000 0>;
+ };
+};
+
+&combphy1 {
+ status = "okay";
+};
+
+&cpu0 {
+ cpu-supply = <&vdd_cpu>;
+};
+
+&cpu1 {
+ cpu-supply = <&vdd_cpu>;
+};
+
+&cpu2 {
+ cpu-supply = <&vdd_cpu>;
+};
+
+&cpu3 {
+ cpu-supply = <&vdd_cpu>;
+};
+
+&gpu {
+ mali-supply = <&vdd_gpu>;
+ status = "okay";
+};
+
+&hdmi {
+ ddc-i2c-bus = <&i2c5>;
+ pinctrl-0 = <&hdmitxm0_cec>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&hdmi_in {
+ hdmi_in_vp0: endpoint {
+ remote-endpoint = <&vp0_out_hdmi>;
+ };
+};
+
+&hdmi_out {
+ hdmi_out_con: endpoint {
+ remote-endpoint = <&hdmi_con_in>;
+ };
+};
+
+&hdmi_sound {
+ status = "okay";
+};
+
+&i2c0 {
+ status = "okay";
+
+ rk817: pmic at 20 {
+ compatible = "rockchip,rk817";
+ reg = <0x20>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <RK_PA3 IRQ_TYPE_LEVEL_LOW>;
+ clock-output-names = "rk808-clkout1", "rk808-clkout2";
+ clock-names = "mclk";
+ clocks = <&cru I2S1_MCLKOUT_TX>;
+ assigned-clocks = <&cru I2S1_MCLKOUT_TX>;
+ assigned-clock-parents = <&cru CLK_I2S1_8CH_TX>;
+ #clock-cells = <1>;
+ #sound-dai-cells = <0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&i2s1m0_mclk>, <&pmic_int_l>;
+ wakeup-source;
+
+ vcc1-supply = <&vcc_sys>;
+ vcc2-supply = <&vcc_sys>;
+ vcc3-supply = <&vcc_sys>;
+ vcc4-supply = <&vcc_sys>;
+ vcc5-supply = <&vcc_sys>;
+ vcc6-supply = <&vcc_sys>;
+ vcc7-supply = <&vcc_sys>;
+ vcc8-supply = <&vcc_sys>;
+ vcc9-supply = <&dcdc_boost>;
+
+ regulators {
+ vdd_logic: DCDC_REG1 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-init-microvolt = <900000>;
+ regulator-ramp-delay = <6001>;
+ regulator-initial-mode = <0x2>;
+ regulator-name = "vdd_logic";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ regulator-suspend-microvolt = <900000>;
+ };
+ };
+
+ vdd_gpu: DCDC_REG2 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <500000>;
+ regulator-max-microvolt = <1350000>;
+ regulator-init-microvolt = <900000>;
+ regulator-ramp-delay = <6001>;
+ regulator-initial-mode = <0x2>;
+ regulator-name = "vdd_gpu";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vcc_ddr: DCDC_REG3 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-initial-mode = <0x2>;
+ regulator-name = "vcc_ddr";
+ regulator-state-mem {
+ regulator-on-in-suspend;
+ };
+ };
+
+ vcc_3v3: DCDC_REG4 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-initial-mode = <0x2>;
+ regulator-name = "vcc_3v3";
+ regulator-state-mem {
+ regulator-on-in-suspend;
+ regulator-suspend-microvolt = <3300000>;
+ };
+ };
+
+ vcca1v8_pmu: LDO_REG1 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-name = "vcca1v8_pmu";
+ regulator-state-mem {
+ regulator-on-in-suspend;
+ regulator-suspend-microvolt = <1800000>;
+ };
+ };
+
+ vdda_0v9: LDO_REG2 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <900000>;
+ regulator-name = "vdda_0v9";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vdda0v9_pmu: LDO_REG3 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <900000>;
+ regulator-max-microvolt = <900000>;
+ regulator-name = "vdda0v9_pmu";
+ regulator-state-mem {
+ regulator-on-in-suspend;
+ regulator-suspend-microvolt = <900000>;
+ };
+ };
+
+ vccio_acodec: LDO_REG4 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vccio_acodec";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vccio_sd: LDO_REG5 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vccio_sd";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vcc3v3_pmu: LDO_REG6 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <3300000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc3v3_pmu";
+ regulator-state-mem {
+ regulator-on-in-suspend;
+ regulator-suspend-microvolt = <3300000>;
+ };
+ };
+
+ vcc_1v8: LDO_REG7 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <1800000>;
+ regulator-name = "vcc_1v8";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vcc1v8_dvp: LDO_REG8 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <3300000>;
+ regulator-name = "vcc1v8_dvp";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ vcc2v8_dvp: LDO_REG9 {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <2800000>;
+ regulator-max-microvolt = <2800000>;
+ regulator-name = "vcc2v8_dvp";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ dcdc_boost: BOOST {
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <4700000>;
+ regulator-max-microvolt = <5400000>;
+ regulator-name = "boost";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+
+ otg_switch: OTG_SWITCH {
+ regulator-name = "otg_switch";
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+ };
+ };
+
+ vdd_cpu: regulator at 40 {
+ compatible = "fcs,fan53555";
+ reg = <0x40>;
+ fcs,suspend-voltage-selector = <1>;
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <712500>;
+ regulator-max-microvolt = <1390000>;
+ regulator-init-microvolt = <900000>;
+ regulator-name = "vdd_cpu";
+ regulator-ramp-delay = <2300>;
+ vin-supply = <&vcc_sys>;
+ regulator-state-mem {
+ regulator-off-in-suspend;
+ };
+ };
+};
+
+&i2c1 {
+ /* Unknown/unused device at 0x3c */
+ status = "disabled";
+};
+
+&i2c5 {
+ pinctrl-0 = <&i2c5m1_xfer>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
+&i2s0_8ch {
+ status = "okay";
+};
+
+&i2s1_8ch {
+ pinctrl-0 = <&i2s1m0_sclktx
+ &i2s1m0_lrcktx
+ &i2s1m0_sdi0
+ &i2s1m0_sdo0>;
+ pinctrl-names = "default";
+ rockchip,trcm-sync-tx-only;
+ status = "okay";
+};
+
+&pinctrl {
+ gpio-btns {
+ btn_pins_ctrl: btn-pins-ctrl {
+ rockchip,pins =
+ <3 RK_PA1 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PA2 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PA4 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PA5 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PA6 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB1 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB3 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB4 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB5 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB6 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PC0 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PC1 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PC2 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PC3 RK_FUNC_GPIO &pcfg_pull_up>;
+ };
+
+ btn_pins_vol: btn-pins-vol {
+ rockchip,pins =
+ <3 RK_PA7 RK_FUNC_GPIO &pcfg_pull_up>,
+ <3 RK_PB0 RK_FUNC_GPIO &pcfg_pull_up>;
+ };
+ };
+
+ gpio-led {
+ led_pins: led-pins {
+ rockchip,pins =
+ <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>,
+ <0 RK_PC6 RK_FUNC_GPIO &pcfg_pull_none>,
+ <0 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>;
+ };
+ };
+
+ joy-mux {
+ joy_mux_en: joy-mux-en {
+ rockchip,pins =
+ <0 RK_PB5 RK_FUNC_GPIO &pcfg_output_low>;
+ };
+ };
+
+ pmic {
+ pmic_int_l: pmic-int-l {
+ rockchip,pins =
+ <0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;
+ };
+ };
+
+ sdio-pwrseq {
+ wifi_enable_h: wifi-enable-h {
+ rockchip,pins =
+ <4 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
+ };
+ };
+
+ vcc3v3-lcd {
+ vcc_lcd_h: vcc-lcd-h {
+ rockchip,pins =
+ <0 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
+ };
+ };
+
+ vcc-wifi {
+ vcc_wifi_h: vcc-wifi-h {
+ rockchip,pins =
+ <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_none>;
+ };
+ };
+};
+
+&pmu_io_domains {
+ status = "okay";
+ pmuio1-supply = <&vcc3v3_pmu>;
+ pmuio2-supply = <&vcc3v3_pmu>;
+ vccio1-supply = <&vccio_acodec>;
+ vccio3-supply = <&vccio_sd>;
+ vccio4-supply = <&vcc_1v8>;
+ vccio5-supply = <&vcc_3v3>;
+ vccio6-supply = <&vcc1v8_dvp>;
+ vccio7-supply = <&vcc_3v3>;
+};
+
+&pwm5 {
+ status = "okay";
+};
+
+&saradc {
+ vref-supply = <&vcc_1v8>;
+ status = "okay";
+};
+
+&sdmmc0 {
+ bus-width = <4>;
+ cap-sd-highspeed;
+ cd-gpios = <&gpio0 RK_PA4 GPIO_ACTIVE_LOW>;
+ disable-wp;
+ pinctrl-0 = <&sdmmc0_bus4 &sdmmc0_clk &sdmmc0_cmd &sdmmc0_det>;
+ pinctrl-names = "default";
+ sd-uhs-sdr104;
+ vmmc-supply = <&vcc_3v3>;
+ vqmmc-supply = <&vccio_sd>;
+ status = "okay";
+};
+
+&sdmmc1 {
+ bus-width = <4>;
+ cap-sd-highspeed;
+ cd-gpios = <&gpio2 RK_PB2 GPIO_ACTIVE_LOW>;
+ disable-wp;
+ pinctrl-0 = <&sdmmc1_bus4 &sdmmc1_cmd &sdmmc1_clk &sdmmc1_det>;
+ pinctrl-names = "default";
+ sd-uhs-sdr104;
+ vmmc-supply = <&vcc_3v3>;
+ vqmmc-supply = <&vcc1v8_dvp>;
+ status = "okay";
+};
+
+&sdmmc2 {
+ bus-width = <4>;
+ cap-sd-highspeed;
+ cap-sdio-irq;
+ keep-power-in-suspend;
+ mmc-pwrseq = <&sdio_pwrseq>;
+ non-removable;
+ pinctrl-0 = <&sdmmc2m0_bus4 &sdmmc2m0_cmd &sdmmc2m0_clk>;
+ pinctrl-names = "default";
+ vmmc-supply = <&vcc_wifi>;
+ vqmmc-supply = <&vcca1v8_pmu>;
+ status = "okay";
+};
+
+&tsadc {
+ rockchip,hw-tshut-mode = <1>;
+ rockchip,hw-tshut-polarity = <0>;
+ status = "okay";
+};
+
+&uart1 {
+ pinctrl-0 = <&uart1m1_xfer &uart1m1_ctsn &uart1m1_rtsn>;
+ pinctrl-names = "default";
+ uart-has-rtscts;
+ status = "okay";
+
+ bluetooth {
+ compatible = "realtek,rtl8821cs-bt", "realtek,rtl8723bs-bt";
+ device-wake-gpios = <&gpio4 4 GPIO_ACTIVE_HIGH>;
+ enable-gpios = <&gpio4 3 GPIO_ACTIVE_HIGH>;
+ host-wake-gpios = <&gpio4 5 GPIO_ACTIVE_HIGH>;
+ };
+};
+
+&uart2 {
+ status = "okay";
+};
+
+/*
+ * Lack the schematics to verify, but port works as a peripheral
+ * (and not a host or OTG port).
+ */
+&usb_host0_xhci {
+ dr_mode = "peripheral";
+ phys = <&usb2phy0_otg>;
+ phy-names = "usb2-phy";
+ status = "okay";
+};
+
+&usb_host1_ehci {
+ status = "okay";
+};
+
+&usb_host1_ohci {
+ status = "okay";
+};
+
+&usb_host1_xhci {
+ phy-names = "usb2-phy", "usb3-phy";
+ phys = <&usb2phy1_host>, <&combphy1 PHY_TYPE_USB3>;
+ status = "okay";
+};
+
+&usb2phy0 {
+ status = "okay";
+};
+
+&usb2phy0_otg {
+ status = "okay";
+};
+
+&usb2phy1 {
+ status = "okay";
+};
+
+&usb2phy1_host {
+ status = "okay";
+};
+
+&vop {
+ assigned-clocks = <&cru DCLK_VOP0>, <&cru DCLK_VOP1>;
+ assigned-clock-parents = <&pmucru PLL_HPLL>, <&cru PLL_VPLL>;
+ status = "okay";
+};
+
+&vop_mmu {
+ status = "okay";
+};
+
+&vp0 {
+ vp0_out_hdmi: endpoint at ROCKCHIP_VOP2_EP_HDMI0 {
+ reg = <ROCKCHIP_VOP2_EP_HDMI0>;
+ remote-endpoint = <&hdmi_in_vp0>;
+ };
+};
diff --git a/arch/arm/mach-rockchip/rk3568/Kconfig b/arch/arm/mach-rockchip/rk3568/Kconfig
index 4e7c02cce0..94e04b79e7 100644
--- a/arch/arm/mach-rockchip/rk3568/Kconfig
+++ b/arch/arm/mach-rockchip/rk3568/Kconfig
@@ -1,11 +1,24 @@
if ROCKCHIP_RK3568
+choice
+ prompt "RK3568/RK3566 board select"
+
config TARGET_EVB_RK3568
bool "RK3568 evaluation board"
select BOARD_LATE_INIT
help
RK3568 EVB is a evaluation board for Rockchp RK3568.
+config TARGET_ANBERNIC_RGXX3_RK3566
+ bool "Anbernic RGXX3"
+ help
+ Anbernic RGXX3 gaming device with Rockchip RK3566. This
+ config can be used with the RG353M, RG353P, RG353V, RG353VS,
+ and RG503. The correct device tree name will automatically
+ be selected by the bootloader.
+
+endchoice
+
config ROCKCHIP_BOOT_MODE_REG
default 0xfdc20200
@@ -19,5 +32,6 @@ config SYS_MALLOC_F_LEN
default 0x2000
source "board/rockchip/evb_rk3568/Kconfig"
+source "board/anbernic/rgxx3_rk3566/Kconfig"
endif
diff --git a/board/anbernic/rgxx3_rk3566/Kconfig b/board/anbernic/rgxx3_rk3566/Kconfig
new file mode 100644
index 0000000000..6743a28a2f
--- /dev/null
+++ b/board/anbernic/rgxx3_rk3566/Kconfig
@@ -0,0 +1,15 @@
+if TARGET_ANBERNIC_RGXX3_RK3566
+
+config SYS_BOARD
+ default "rgxx3_rk3566"
+
+config SYS_VENDOR
+ default "anbernic"
+
+config SYS_CONFIG_NAME
+ default "anbernic-rgxx3-rk3566"
+
+config BOARD_SPECIFIC_OPTIONS
+ def_bool y
+
+endif
diff --git a/board/anbernic/rgxx3_rk3566/MAINTAINERS b/board/anbernic/rgxx3_rk3566/MAINTAINERS
new file mode 100644
index 0000000000..647e49d28a
--- /dev/null
+++ b/board/anbernic/rgxx3_rk3566/MAINTAINERS
@@ -0,0 +1,6 @@
+RGXX3-RK3566
+M: Chris Morgan <macromorgan at hotmail.com>
+S: Maintained
+F: board/anbernic/rgxx3-rk3566
+F: include/configs/anbernic-rgxx3-rk3566
+F: configs/anbernic-rgxx3_defconfig
diff --git a/board/anbernic/rgxx3_rk3566/Makefile b/board/anbernic/rgxx3_rk3566/Makefile
new file mode 100644
index 0000000000..afd3e0adf6
--- /dev/null
+++ b/board/anbernic/rgxx3_rk3566/Makefile
@@ -0,0 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (c) 2023 Chris Morgan <macromorgan at hotmail.com>
+#
+
+obj-y += rgxx3-rk3566.o
diff --git a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
new file mode 100644
index 0000000000..decc46db78
--- /dev/null
+++ b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
@@ -0,0 +1,203 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Chris Morgan <macromorgan at hotmail.com>
+ */
+
+#include <abuf.h>
+#include <adc.h>
+#include <asm/io.h>
+#include <dm.h>
+#include <linux/delay.h>
+#include <pwm.h>
+#include <rng.h>
+#include <stdlib.h>
+#include <mmc.h>
+#include <env.h>
+
+#define GPIO0_BASE 0xfdd60000
+#define GPIO_SWPORT_DR_H 0x0004
+#define GPIO_SWPORT_DDR_H 0x000c
+#define GPIO_A5 BIT(5)
+#define GPIO_A6 BIT(6)
+
+#define GPIO_WRITEMASK(bits) ((bits) << 16)
+
+#define DTB_DIR "rockchip/"
+
+struct rg3xx_model {
+ const char *board;
+ const char *board_name;
+ const char *fdtfile;
+};
+
+enum rgxx3_device_id {
+ RG353M,
+ RG353P,
+ RG353V,
+ RG353VS,
+ RG503,
+};
+
+static const struct rg3xx_model rg3xx_model_details[] = {
+ [RG353M] = {
+ "rk3566-anbernic-rg353m",
+ "RG353M",
+ DTB_DIR "rk3566-anbernic-rg353m.dtb",
+ },
+ [RG353P] = {
+ "rk3566-anbernic-rg353p",
+ "RG353P",
+ DTB_DIR "rk3566-anbernic-rg353p.dtb",
+ },
+ [RG353V] = {
+ "rk3566-anbernic-rg353v",
+ "RG353V",
+ DTB_DIR "rk3566-anbernic-rg353v.dtb",
+ },
+ [RG353VS] = {
+ "rk3566-anbernic-rg353vs",
+ "RG353VS",
+ DTB_DIR "rk3566-anbernic-rg353vs.dtb",
+ },
+ [RG503] = {
+ "rk3566-anbernic-rg503",
+ "RG503",
+ DTB_DIR "rk3566-anbernic-rg503.dtb",
+ },
+};
+
+/*
+ * Start LED very early so user knows device is on. Set color
+ * to amber.
+ */
+void spl_board_init(void)
+{
+ /* Set GPIO0_A5 and GPIO0_A6 to output. */
+ writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | (GPIO_A6 | GPIO_A5),
+ (GPIO0_BASE + GPIO_SWPORT_DDR_H));
+ /* Set GPIO0_A5 to 0 and GPIO0_A6 to 1. */
+ writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | GPIO_A6,
+ (GPIO0_BASE + GPIO_SWPORT_DR_H));
+}
+
+/* Use hardware rng to seed Linux random. */
+int board_rng_seed(struct abuf *buf)
+{
+ struct udevice *dev;
+ size_t len = 0x8;
+ u64 *data;
+
+ data = malloc(len);
+ if (!data) {
+ printf("Out of memory\n");
+ return -ENOMEM;
+ }
+
+ if (uclass_get_device(UCLASS_RNG, 0, &dev) || !dev) {
+ printf("No RNG device\n");
+ return -ENODEV;
+ }
+
+ if (dm_rng_read(dev, data, len)) {
+ printf("Reading RNG failed\n");
+ return -EIO;
+ }
+
+ abuf_init_set(buf, data, len);
+
+ return 0;
+}
+
+/*
+ * Buzz the buzzer so the user knows something is going on. Make it
+ * optional in case PWM is disabled.
+ */
+void __maybe_unused startup_buzz(void)
+{
+ struct udevice *dev;
+ int err;
+
+ err = uclass_get_device(UCLASS_PWM, 0, &dev);
+ if (err)
+ printf("pwm not found\n");
+
+ pwm_set_enable(dev, 0, 1);
+ mdelay(200);
+ pwm_set_enable(dev, 0, 0);
+}
+
+/* Detect which Anbernic RGXX3 device we are using so as to load the
+ * correct devicetree for Linux. Set an environment variable once
+ * found. The detection depends on the value of ADC channel 1, the
+ * presence of an eMMC on mmc0, and querying the DSI panel (TODO).
+ */
+int rgxx3_detect_device(void)
+{
+ u32 adc_info;
+ int ret;
+ int board_id = -ENXIO;
+ struct mmc *mmc;
+
+ ret = adc_channel_single_shot("saradc at fe720000", 1, &adc_info);
+ if (ret) {
+ printf("Read SARADC failed with error %d\n", ret);
+ return ret;
+ }
+
+ /* Observed value 517. */
+ if (adc_info > 505 && adc_info < 530)
+ board_id = RG353M;
+ /* Observed value 695. */
+ if (adc_info > 680 && adc_info < 710)
+ board_id = RG353V;
+ /* Documented value 860. */
+ if (adc_info > 850 && adc_info < 870)
+ board_id = RG353P;
+ /* Observed value 1023. */
+ if (adc_info > 1010)
+ board_id = RG503;
+
+ /*
+ * Try to access the eMMC on an RG353V. If it's missing, it's
+ * an RG353VS. Note we could also check for a touchscreen at
+ * 0x1a on i2c2.
+ */
+ if (board_id == RG353V) {
+ mmc = find_mmc_device(0);
+ if (mmc) {
+ ret = mmc_init(mmc);
+ if (ret)
+ board_id = RG353VS;
+ }
+ }
+
+ if (board_id < 0)
+ return board_id;
+
+ env_set("board", rg3xx_model_details[board_id].board);
+ env_set("board_name",
+ rg3xx_model_details[board_id].board_name);
+ env_set("fdtfile", rg3xx_model_details[board_id].fdtfile);
+
+ return 0;
+}
+
+int rk_board_late_init(void)
+{
+ int ret;
+
+ /* Turn off orange LED and turn on green LED. */
+ writel(GPIO_WRITEMASK(GPIO_A6 | GPIO_A5) | GPIO_A5,
+ (GPIO0_BASE + GPIO_SWPORT_DR_H));
+
+ ret = rgxx3_detect_device();
+ if (ret) {
+ printf("Unable to detect device type: %d\n", ret);
+ return ret;
+ }
+
+ if (IS_ENABLED(CONFIG_DM_PWM))
+ startup_buzz();
+
+ return 0;
+}
diff --git a/configs/anbernic-rgxx3_defconfig b/configs/anbernic-rgxx3_defconfig
new file mode 100644
index 0000000000..b17e917914
--- /dev/null
+++ b/configs/anbernic-rgxx3_defconfig
@@ -0,0 +1,78 @@
+CONFIG_ARM=y
+CONFIG_SKIP_LOWLEVEL_INIT=y
+CONFIG_COUNTER_FREQUENCY=24000000
+CONFIG_ARCH_ROCKCHIP=y
+CONFIG_TEXT_BASE=0x00a00000
+CONFIG_SPL_LIBCOMMON_SUPPORT=y
+CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_NR_DRAM_BANKS=2
+CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
+CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0xc00000
+CONFIG_DEFAULT_DEVICE_TREE="rk3566-anbernic-rgxx3"
+CONFIG_ROCKCHIP_RK3568=y
+CONFIG_SPL_ROCKCHIP_BACK_TO_BROM=y
+CONFIG_SPL_ROCKCHIP_COMMON_BOARD=y
+CONFIG_SPL_MMC=y
+CONFIG_SPL_SERIAL=y
+CONFIG_SPL_STACK_R_ADDR=0x600000
+CONFIG_TARGET_ANBERNIC_RGXX3_RK3566=y
+CONFIG_SPL_STACK=0x400000
+CONFIG_DEBUG_UART_BASE=0xFE660000
+CONFIG_DEBUG_UART_CLOCK=24000000
+CONFIG_SYS_LOAD_ADDR=0xc00800
+CONFIG_DEBUG_UART=y
+CONFIG_FIT=y
+CONFIG_FIT_VERBOSE=y
+CONFIG_SPL_LOAD_FIT=y
+CONFIG_DEFAULT_FDT_FILE="rockchip/rk3566-anbernic-rgxx3.dtb"
+# CONFIG_DISPLAY_CPUINFO is not set
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SPL_MAX_SIZE=0x20000
+CONFIG_SPL_PAD_TO=0x7f8000
+CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
+CONFIG_SPL_BSS_START_ADDR=0x4000000
+CONFIG_SPL_BSS_MAX_SIZE=0x4000
+CONFIG_SPL_BOARD_INIT=y
+# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
+# CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
+CONFIG_SPL_STACK_R=y
+CONFIG_SPL_ATF=y
+CONFIG_CMD_PWM=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MMC=y
+# CONFIG_CMD_SETEXPR is not set
+# CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_SPL_OF_CONTROL=y
+CONFIG_OF_LIVE=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+# CONFIG_NET is not set
+CONFIG_SPL_REGMAP=y
+CONFIG_SPL_SYSCON=y
+CONFIG_SPL_CLK=y
+CONFIG_ARM_SMCCC_FEATURES=y
+CONFIG_SCMI_FIRMWARE=y
+CONFIG_ROCKCHIP_GPIO=y
+CONFIG_SYS_I2C_ROCKCHIP=y
+CONFIG_MISC=y
+CONFIG_SUPPORT_EMMC_RPMB=y
+CONFIG_MMC_DW=y
+CONFIG_MMC_DW_ROCKCHIP=y
+CONFIG_MMC_SDHCI=y
+CONFIG_MMC_SDHCI_SDMA=y
+CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_DM_PMIC=y
+CONFIG_DM_PMIC_FAN53555=y
+CONFIG_PMIC_RK8XX=y
+CONFIG_REGULATOR_PWM=y
+CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_REGULATOR_RK8XX=y
+CONFIG_DM_REGULATOR_SCMI=y
+CONFIG_PWM_ROCKCHIP=y
+CONFIG_SPL_RAM=y
+CONFIG_BAUDRATE=1500000
+CONFIG_DEBUG_UART_SHIFT=2
+CONFIG_SYS_NS16550_MEM32=y
+CONFIG_SYSRESET=y
+CONFIG_REGEX=y
+CONFIG_ERRNO_STR=y
+# CONFIG_EFI_LOADER is not set
diff --git a/doc/board/anbernic/index.rst b/doc/board/anbernic/index.rst
new file mode 100644
index 0000000000..beddc26e4c
--- /dev/null
+++ b/doc/board/anbernic/index.rst
@@ -0,0 +1,9 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+Anbernic
+=====
+
+.. toctree::
+ :maxdepth: 2
+
+ rgxx3.rst
diff --git a/doc/board/anbernic/rgxx3.rst b/doc/board/anbernic/rgxx3.rst
new file mode 100644
index 0000000000..42bd4e29ba
--- /dev/null
+++ b/doc/board/anbernic/rgxx3.rst
@@ -0,0 +1,47 @@
+.. SPDX-License-Identifier: GPL-2.0+
+
+U-Boot for Anbernic RGxx3 Devices
+=============================
+
+This allows U-Boot to boot the following Anbernic devices:
+
+ - Anbernic RG353M
+ - Anbernic RG353P
+ - Anbernic RG353V
+ - Anbernic RG353VS
+ - Anbernic RG503
+
+The correct device is detected automatically by comparing ADC values
+from ADC channel 1. In the event of an RG353V, an attempt is then made
+to probe for an eMMC and if it fails the device is assumed to be an
+RG353VS. Based on the detected device, the environment variables
+"board", "board_name", and "fdtfile" are set to the correct values
+corresponding to the board which can be read by a boot script to boot
+with the correct device tree.
+
+Please note that there are some versions of the RG353 devices with
+different panels. Panel auto-detection is planned for a later date.
+
+Building U-Boot
+---------------
+
+.. code-block:: bash
+
+ $ export CROSS_COMPILE=aarch64-none-elf-
+ $ export BL31=../rkbin/bin/rk35/rk3568_bl31_v1.34.elf
+ $ export ROCKCHIP_TPL=../rkbin/bin/rk35/rk3568_ddr_1056MHz_v1.13.bin
+ $ make anbernic-rgxx3_defconfig
+ $ make
+
+This will build ``u-boot-rockchip.bin`` which can be written to an SD
+card.
+
+Image installation
+------------------
+
+Write the ``u-boot-rockchip.bin`` to an SD card offset 32kb from the
+start.
+
+.. code-block:: bash
+
+ $ dd if=u-boot-rockchip.bin of=/dev/mmcblk0 bs=512 seek=64
diff --git a/doc/board/index.rst b/doc/board/index.rst
index 618d22e616..0420f0ef7f 100644
--- a/doc/board/index.rst
+++ b/doc/board/index.rst
@@ -11,6 +11,7 @@ Board-specific doc
AndesTech/index
allwinner/index
amlogic/index
+ anbernic/index
apple/index
armltd/index
atmel/index
diff --git a/doc/board/rockchip/rockchip.rst b/doc/board/rockchip/rockchip.rst
index b5563b8f7f..204cace1e9 100644
--- a/doc/board/rockchip/rockchip.rst
+++ b/doc/board/rockchip/rockchip.rst
@@ -87,6 +87,9 @@ List of mainline supported Rockchip boards:
- Rockchip Evb-RK3399 (evb_rk3399)
- Theobroma Systems RK3399-Q7 SoM - Puma (puma_rk3399)
+* rk3566
+ - Anbernic RGxx3 (rgxx3-rk3566)
+
* rk3568
- Rockchip Evb-RK3568 (evb-rk3568)
diff --git a/include/configs/anbernic-rgxx3-rk3566.h b/include/configs/anbernic-rgxx3-rk3566.h
new file mode 100644
index 0000000000..3c4ea4e7d8
--- /dev/null
+++ b/include/configs/anbernic-rgxx3-rk3566.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __ANBERNIC_RGXX3_RK3566_H
+#define __ANBERNIC_RGXX3_RK3566_H
+
+#include <configs/rk3568_common.h>
+
+#define ROCKCHIP_DEVICE_SETTINGS \
+ "stdout=serial,vidconsole\0" \
+ "stderr=serial,vidconsole\0"
+
+#endif
--
2.34.1
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