On Thu, 21 Sep 2023 08:51:36 -0500
Chris Morgan <macroalpha82@xxxxxxxxx> wrote:
Hi,
> From: Chris Morgan <macromorgan@xxxxxxxxxxx>
>
> 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.
That whole situation is still a bit odd: why is there an external RTC to
begin with? And did they really save on the 32KHz oscillator, in favour of
attaching a whole I2C RTC chip? Maybe something is off with the V3 RTC in
general, and just nobody noticed or cared so far?
Anyways, I think the DT is fine now, I see all the comments addressed, and
dtc and dt-validate are happy:
Reviewed-by: Andre Przywara <andre.przywara@xxxxxxx>
Cheers,
Andre
> Working/Tested:
> - SDMMC
> - UART (for debugging)
> - Buttons
> - Charging/battery/PMIC
> - Speaker
> - RTC (external RTC)
> - USB
> - Display
>
> Signed-off-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
> ---
> 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 eebb5a0c873a..2d26c3397f14 100644
> --- 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
> index 000000000000..1a4429dc57b1
> --- /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 {
> + 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 = <®_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 = <®_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 = <®_vcc3v3>;
> + vqmmc-supply = <®_vcc3v3>;
> + status = "okay";
> +};
> +
> +&ohci {
> + status = "okay";
> +};
> +
> +&pio {
> + vcc-pb-supply = <®_vcc3v3>;
> + vcc-pc-supply = <®_vcc3v3>;
> + vcc-pf-supply = <®_vcc3v3>;
> + vcc-pg-supply = <®_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. */
> +®_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. */
> +®_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.
> + */
> +®_ldo1 {
> + regulator-always-on;
> + regulator-name = "vcc-rtc";
> +};
> +
> +/* LDO2 wired into VCC-PLL and audio codec. */
> +®_ldo2 {
> + regulator-always-on;
> + regulator-max-microvolt = <3000000>;
> + regulator-min-microvolt = <3000000>;
> + regulator-name = "vcc-pll";
> +};
> +
> +/* LDO3, LDO4, and LDO5 unused. */
> +®_ldo3 {
> + status = "disabled";
> +};
> +
> +®_ldo4 {
> + status = "disabled";
> +};
> +
> +/*
> + * Force the driver to use internal oscillator by removing clocks
> + * property.
> + */
> +&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";
> +};
