sunxi: Add support for OrangePi Zero2

OrangePi Zero2 is SBC based on Allwinner H616 with 1 GiB of RAM, SD card
support, gigabit ethernet, micro HDMI, WIFI, Bluetooth and 1 USB 2.0
port. It also has two GPIO headers which allows further peripherals to
be used.

The devicetree file is taken from v3 of the OrangePi Zero2 Linux
submission [1], which it's not yet merged.

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2021-January/632084.html

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

4 files changed, 262 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index afae2d966ce..858b79ac97e 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -617,6 +617,8 @@ dtb-$(CONFIG_MACH_SUN50I_H6) += \
 	sun50i-h6-orangepi-one-plus.dtb \
 	sun50i-h6-pine-h64.dtb \
 	sun50i-h6-tanix-tx6.dtb
+dtb-$(CONFIG_MACH_SUN50I_H616) += \
+	sun50i-h616-orangepi-zero2.dtb
 dtb-$(CONFIG_MACH_SUN50I) += \
 	sun50i-a64-amarula-relic.dtb \
 	sun50i-a64-bananapi-m64.dtb \
diff --git a/arch/arm/dts/sun50i-h616-orangepi-zero2.dts b/arch/arm/dts/sun50i-h616-orangepi-zero2.dts
new file mode 100644
index 00000000000..e6de49f89e3
--- /dev/null
+++ b/arch/arm/dts/sun50i-h616-orangepi-zero2.dts
@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+/*
+ * Copyright (C) 2020 Arm Ltd.
+ */
+
+/dts-v1/;
+
+#include "sun50i-h616.dtsi"
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+#include <dt-bindings/leds/common.h>
+
+/ {
+	model = "OrangePi Zero2";
+	compatible = "xunlong,orangepi-zero2", "allwinner,sun50i-h616";
+
+	aliases {
+		ethernet0 = &emac0;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			function = LED_FUNCTION_POWER;
+			color = <LED_COLOR_ID_RED>;
+			gpios = <&pio 2 12 GPIO_ACTIVE_HIGH>; /* PC12 */
+			default-state = "on";
+		};
+
+		led-1 {
+			function = LED_FUNCTION_STATUS;
+			color = <LED_COLOR_ID_GREEN>;
+			gpios = <&pio 2 13 GPIO_ACTIVE_HIGH>; /* PC13 */
+		};
+	};
+
+	reg_vcc5v: vcc5v {
+		/* board wide 5V supply directly from the USB-C socket */
+		compatible = "regulator-fixed";
+		regulator-name = "vcc-5v";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		regulator-always-on;
+	};
+
+	reg_usb1_vbus: usb1-vbus {
+		compatible = "regulator-fixed";
+		regulator-name = "usb1-vbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		vin-supply = <&reg_vcc5v>;
+		enable-active-high;
+		gpio = <&pio 2 16 GPIO_ACTIVE_HIGH>; /* PC16 */
+		status = "okay";
+	};
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+/* USB 2 & 3 are on headers only. */
+
+&emac0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&ext_rgmii_pins>;
+	phy-mode = "rgmii";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-supply = <&reg_dcdce>;
+	allwinner,rx-delay-ps = <3100>;
+	allwinner,tx-delay-ps = <700>;
+	status = "okay";
+};
+
+&mdio0 {
+	ext_rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};
+
+&mmc0 {
+	vmmc-supply = <&reg_dcdce>;
+	cd-gpios = <&pio 5 6 GPIO_ACTIVE_LOW>;	/* PF6 */
+	bus-width = <4>;
+	status = "okay";
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&r_rsb {
+	status = "okay";
+
+	axp305: pmic@745 {
+		compatible = "x-powers,axp305", "x-powers,axp805",
+			     "x-powers,axp806";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		reg = <0x745>;
+
+		x-powers,self-working-mode;
+		vina-supply = <&reg_vcc5v>;
+		vinb-supply = <&reg_vcc5v>;
+		vinc-supply = <&reg_vcc5v>;
+		vind-supply = <&reg_vcc5v>;
+		vine-supply = <&reg_vcc5v>;
+		aldoin-supply = <&reg_vcc5v>;
+		bldoin-supply = <&reg_vcc5v>;
+		cldoin-supply = <&reg_vcc5v>;
+
+		regulators {
+			reg_aldo1: aldo1 {
+				regulator-always-on;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-name = "vcc-sys";
+			};
+
+			reg_aldo2: aldo2 {	/* 3.3V on headers */
+				regulator-always-on;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-name = "vcc3v3-ext";
+			};
+
+			reg_aldo3: aldo3 {	/* 3.3V on headers */
+				regulator-always-on;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-name = "vcc3v3-ext2";
+			};
+
+			reg_bldo1: bldo1 {
+				regulator-always-on;
+				regulator-min-microvolt = <1800000>;
+				regulator-max-microvolt = <1800000>;
+				regulator-name = "vcc1v8";
+			};
+
+			bldo2 {
+				/* unused */
+			};
+
+			bldo3 {
+				/* unused */
+			};
+
+			bldo4 {
+				/* unused */
+			};
+
+			cldo1 {
+				/* reserved */
+			};
+
+			cldo2 {
+				/* unused */
+			};
+
+			cldo3 {
+				/* unused */
+			};
+
+			reg_dcdca: dcdca {
+				regulator-always-on;
+				regulator-min-microvolt = <810000>;
+				regulator-max-microvolt = <1080000>;
+				regulator-name = "vdd-cpu";
+			};
+
+			reg_dcdcc: dcdcc {
+				regulator-always-on;
+				regulator-min-microvolt = <810000>;
+				regulator-max-microvolt = <1080000>;
+				regulator-name = "vdd-gpu-sys";
+			};
+
+			reg_dcdcd: dcdcd {
+				regulator-always-on;
+				regulator-min-microvolt = <1500000>;
+				regulator-max-microvolt = <1500000>;
+				regulator-name = "vdd-dram";
+			};
+
+			reg_dcdce: dcdce {
+				regulator-boot-on;
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				regulator-name = "vcc-eth-mmc";
+			};
+
+			sw {
+				/* unused */
+			};
+		};
+	};
+};
+
+&spi0  {
+	status = "okay";
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <40000000>;
+	};
+};
+
+&uart0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart0_ph_pins>;
+	status = "okay";
+};
+
+&usbotg {
+	dr_mode = "peripheral";
+	status = "okay";
+};
+
+&usbphy {
+	usb1_vbus-supply = <&reg_usb1_vbus>;
+	status = "okay";
+};
diff --git a/board/sunxi/MAINTAINERS b/board/sunxi/MAINTAINERS
index 46db701fe2b..76eba2ad204 100644
--- a/board/sunxi/MAINTAINERS
+++ b/board/sunxi/MAINTAINERS
@@ -425,6 +425,11 @@ M:	Diego Rondini <diego.rondini@kynetics.com>
 S:	Maintained
 F:	configs/orangepi_zero_plus2_h3_defconfig
 
+ORANGEPI ZERO 2 BOARD
+M:	Jernej Skrabec <jernej.skrabec@siol.net>
+S:	Maintained
+F:	configs/orangepi_zero2_defconfig
+
 ORANGEPI PC 2 BOARD
 M:	Andre Przywara <andre.przywara@arm.com>
 S:	Maintained
diff --git a/configs/orangepi_zero2_defconfig b/configs/orangepi_zero2_defconfig
new file mode 100644
index 00000000000..0c20b5ff28f
--- /dev/null
+++ b/configs/orangepi_zero2_defconfig
@@ -0,0 +1,13 @@
+CONFIG_ARM=y
+CONFIG_ARCH_SUNXI=y
+CONFIG_SPL=y
+CONFIG_DRAM_SUN50I_H616_WRITE_LEVELING=y
+CONFIG_DRAM_SUN50I_H616_READ_CALIBRATION=y
+CONFIG_DRAM_SUN50I_H616_READ_TRAINING=y
+CONFIG_DRAM_SUN50I_H616_WRITE_TRAINING=y
+CONFIG_MACH_SUN50I_H616=y
+CONFIG_MMC0_CD_PIN="PF6"
+CONFIG_R_I2C_ENABLE=y
+CONFIG_DEFAULT_DEVICE_TREE="sun50i-h616-orangepi-zero2"
+# CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SPL_I2C_SUPPORT=y