ARM: dts: sunxi: add support for Anbernic RG-Nano

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. There does not appear to be a crystal feeding the internal RTC so
it does not keep proper time (for me it ran 8 hours slow in a 24 hour
period). External RTC works just fine.

Working/Tested:
- SDMMC
- UART (for debugging)
- Buttons
- Charging/battery/PMIC
- Speaker
- RTC (external RTC)
- USB
- Display

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Link: https://lore.kernel.org/r/20230929144441.3409-5-macroalpha82@gmail.com
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

diff --git a/arch/arm/boot/dts/allwinner/Makefile b/arch/arm/boot/dts/allwinner/Makefile
index eebb5a0c873ad4a6d7dc3676ee329f5b1b49bd58..2d26c3397f145eef0bb9816744d481d22b4b9121 100644 (file)
--- a/arch/arm/boot/dts/allwinner/Makefile
+++ b/arch/arm/boot/dts/allwinner/Makefile
@@ -256,6 +256,7 @@ 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 (file)
index 0000000..f34dfdf
--- /dev/null
+++ b/arch/arm/boot/dts/allwinner/sun8i-v3s-anbernic-rg-nano.dts
@@ -0,0 +1,276 @@
+// 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 {
+               rtc0 = &pcf8563;
+               rtc1 = &rtc;
+               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>;
+               };
+       };
+};
+
+&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 {
+       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. */
+&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";
+};
+
+/* RTC uses internal oscillator */
+&rtc {
+       /delete-property/ clocks;
+};
+
+&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";
+};