[PATCH V4 8/8] ARM: dts: sunxi: add support for Anbernic RG-Nano

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

The Anbernic RG-Nano is a small portable game device based on the
Allwinner V3s SoC. It has GPIO buttons on the face and side for
input, a single mono speaker, a 240x240 SPI controlled display, a USB-C
OTG port, an SD card slot for booting, and 64MB of RAM included in the
SoC.

Working/Tested:
- SDMMC
- UART (for debugging)
- Buttons
- Charging/battery/PMIC
- Speaker
- RTC
- USB Host and Gadget*
- Display (at 60hz)

*There is an issue with the usb_phy where it forces the device to host
mode. Until the phy driver is fixed this can be bypassed by either
removing the phy references from the ohci and ehci nodes or by setting
the usbphy on the ohci and ehci nodes to 1 (which is incorrect).

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 arch/arm/boot/dts/allwinner/Makefile          |   1 +
 .../allwinner/sun8i-v3s-anbernic-rg-nano.dts  | 284 ++++++++++++++++++
 2 files changed, 285 insertions(+)
 create mode 100644 arch/arm/boot/dts/allwinner/sun8i-v3s-anbernic-rg-nano.dts

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index 589a1ce1120a..2be83a1edcbb 100644
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -237,6 +237,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
 	sun8i-t113s-mangopi-mq-r-t113.dtb \
 	sun8i-t3-cqa3t-bv3.dtb \
 	sun8i-v3-sl631-imx179.dtb \
+	sun8i-v3s-anbernic-rg-nano.dtb \
 	sun8i-v3s-licheepi-zero.dtb \
 	sun8i-v3s-licheepi-zero-dock.dtb \
 	sun8i-v40-bananapi-m2-berry.dtb
diff --git a/arch/arm/boot/dts/allwinner/sun8i-v3s-anbernic-rg-nano.dts b/arch/arm/boot/dts/allwinner/sun8i-v3s-anbernic-rg-nano.dts
new file mode 100644
index 000000000000..bcccb0d3f9ce
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s-anbernic-rg-nano.dts
@@ -0,0 +1,284 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+/dts-v1/;
+#include <dt-bindings/input/linux-event-codes.h>
+#include "sun8i-v3s.dtsi"
+#include "sunxi-common-regulators.dtsi"
+
+/ {
+	model = "Anbernic RG Nano";
+	compatible = "anbernic,rg-nano", "allwinner,sun8i-v3s";
+
+	aliases {
+		serial0 = &uart0;
+	};
+
+	backlight: backlight {
+		compatible = "pwm-backlight";
+		brightness-levels = <0 1 2 3 8 14 21 32 46 60 80 100>;
+		default-brightness-level = <11>;
+		power-supply = <&reg_vcc5v0>;
+		pwms = <&pwm 0 40000 1>;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	gpio_keys: gpio-keys {
+		compatible = "gpio-keys";
+
+		button-a {
+			gpios = <&gpio_expander 12 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-A";
+			linux,code = <BTN_EAST>;
+		};
+
+		button-b {
+			gpios = <&gpio_expander 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-B";
+			linux,code = <BTN_SOUTH>;
+		};
+
+		button-down {
+			gpios = <&gpio_expander 1 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "DPAD-DOWN";
+			linux,code = <BTN_DPAD_DOWN>;
+		};
+
+		button-left {
+			gpios = <&gpio_expander 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "DPAD-LEFT";
+			linux,code = <BTN_DPAD_LEFT>;
+		};
+
+		button-right {
+			gpios = <&gpio_expander 0 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "DPAD-RIGHT";
+			linux,code = <BTN_DPAD_RIGHT>;
+		};
+
+		button-se {
+			gpios = <&gpio_expander 7 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-SELECT";
+			linux,code = <BTN_SELECT>;
+		};
+
+		button-st {
+			gpios = <&gpio_expander 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-START";
+			linux,code = <BTN_START>;
+		};
+
+		button-tl {
+			gpios = <&gpio_expander 2 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-L";
+			linux,code = <BTN_TL>;
+		};
+
+		button-tr {
+			gpios = <&gpio_expander 15 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-R";
+			linux,code = <BTN_TR>;
+		};
+
+		button-up {
+			gpios = <&gpio_expander 3 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "DPAD-UP";
+			linux,code = <BTN_DPAD_UP>;
+		};
+
+		button-x {
+			gpios = <&gpio_expander 11 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-X";
+			linux,code = <BTN_NORTH>;
+		};
+
+		button-y {
+			gpios = <&gpio_expander 13 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+			label = "BTN-Y";
+			linux,code = <BTN_WEST>;
+		};
+	};
+};
+
+&ccu {
+	clocks = <&osc24M>, <&osc32k>;
+};
+
+&codec {
+	allwinner,audio-routing = "Speaker", "HP",
+				  "MIC1", "Mic",
+				  "Mic", "HBIAS";
+	allwinner,pa-gpios = <&pio 5 6 (GPIO_ACTIVE_HIGH | GPIO_PULL_UP)>; /* PF6 */
+	status = "okay";
+};
+
+&ehci {
+	status = "okay";
+};
+
+&i2c0 {
+	status = "okay";
+
+	gpio_expander: gpio@20 {
+		compatible = "nxp,pcal6416";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		#interrupt-cells = <2>;
+		interrupt-controller;
+		interrupt-parent = <&pio>;
+		interrupts = <1 3 IRQ_TYPE_EDGE_BOTH>; /* PB3/EINT3 */
+		vcc-supply = <&reg_vcc3v3>;
+	};
+
+	axp209: pmic@34 {
+		reg = <0x34>;
+		interrupt-parent = <&pio>;
+		interrupts = <1 5 IRQ_TYPE_EDGE_FALLING>; /* PB5/EINT5 */
+	};
+
+	pcf8563: rtc@51 {
+		compatible = "nxp,pcf8563";
+		reg = <0x51>;
+	};
+};
+
+#include "axp209.dtsi"
+
+&battery_power_supply {
+	status = "okay";
+};
+
+&mmc0 {
+	broken-cd;
+	bus-width = <4>;
+	disable-wp;
+	vmmc-supply = <&reg_vcc3v3>;
+	vqmmc-supply = <&reg_vcc3v3>;
+	status = "okay";
+};
+
+&ohci {
+	status = "okay";
+};
+
+&pio {
+	clocks = <&ccu CLK_BUS_PIO>, <&osc24M>, <&osc32k>;
+	vcc-pb-supply = <&reg_vcc3v3>;
+	vcc-pc-supply = <&reg_vcc3v3>;
+	vcc-pf-supply = <&reg_vcc3v3>;
+	vcc-pg-supply = <&reg_vcc3v3>;
+
+	spi0_no_miso_pins: spi0-no-miso-pins {
+		pins = "PC1", "PC2", "PC3";
+		function = "spi0";
+	};
+};
+
+&pwm {
+	pinctrl-0 = <&pwm0_pin>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+/* DCDC2 wired into vdd-cpu, vdd-sys, and vdd-ephy. */
+&reg_dcdc2 {
+	regulator-always-on;
+	regulator-max-microvolt = <1250000>;
+	regulator-min-microvolt = <1250000>;
+	regulator-name = "vdd-cpu";
+};
+
+/* DCDC3 wired into every 3.3v input that isn't the RTC. */
+&reg_dcdc3 {
+	regulator-always-on;
+	regulator-max-microvolt = <3300000>;
+	regulator-min-microvolt = <3300000>;
+	regulator-name = "vcc-io";
+};
+
+/*
+ * LDO1 wired into RTC, voltage is hard-wired at 3.3v and cannot be
+ * software modified. Note that setting voltage here to 3.3v for accuracy
+ * sake causes an issue with the driver that causes it to fail to probe
+ * because of a voltage constraint in the driver.
+ */
+&reg_ldo1 {
+	regulator-always-on;
+	regulator-name = "vcc-rtc";
+};
+
+/* LDO2 wired into VCC-PLL and audio codec. */
+&reg_ldo2 {
+	regulator-always-on;
+	regulator-max-microvolt = <3000000>;
+	regulator-min-microvolt = <3000000>;
+	regulator-name = "vcc-pll";
+};
+
+/* LDO3, LDO4, and LDO5 unused. */
+&reg_ldo3 {
+	status = "disabled";
+};
+
+&reg_ldo4 {
+	status = "disabled";
+};
+
+/* External RTC used instead, internal RTC runs fast. */
+&rtc {
+	status = "disabled";
+};
+
+&spi0 {
+	pinctrl-0 = <&spi0_no_miso_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	display@0 {
+		compatible = "saef,sftc154b", "panel-mipi-dbi-spi";
+		reg = <0>;
+		backlight = <&backlight>;
+		dc-gpios = <&pio 2 0 GPIO_ACTIVE_HIGH>; /* PC0 */
+		reset-gpios = <&pio 1 2 GPIO_ACTIVE_HIGH>; /* PB2 */
+		spi-max-frequency = <100000000>;
+
+		height-mm = <39>;
+		width-mm = <39>;
+
+		/* Set hb-porch to compensate for non-visible area */
+		panel-timing {
+			hactive = <240>;
+			vactive = <240>;
+			hback-porch = <80>;
+			vback-porch = <0>;
+			clock-frequency = <0>;
+			hfront-porch = <0>;
+			hsync-len = <0>;
+			vfront-porch = <0>;
+			vsync-len = <0>;
+		};
+	};
+};
+
+&uart0 {
+	pinctrl-0 = <&uart0_pb_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usb_power_supply {
+	status = "okay";
+};
+
+&usbphy {
+	usb0_id_det-gpios = <&pio 6 5 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>; /* PG5 */
+	status = "okay";
+};
-- 
2.34.1