riscv: dts: allwinner: Add Allwinner D1 Nezha devicetree

"D1 Nezha" is Allwinner's first-party development board for the D1 SoC.
It was shipped with 512M, 1G, or 2G of DDR3. It supports onboard audio,
HDMI, gigabit Ethernet, WiFi and Bluetooth, USB 2.0 host and OTG ports,
plus low-speed I/O from the SoC and a GPIO expander chip.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Reviewed-by: Guo Ren <guoren@kernel.org>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230126045738.47903-7-samuel@sholland.org
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

2 files changed, 167 insertions, 0 deletions

diff --git a/arch/riscv/boot/dts/allwinner/Makefile b/arch/riscv/boot/dts/allwinner/Makefile
index 2f2792594f7d..277e59d1c907 100644
--- a/arch/riscv/boot/dts/allwinner/Makefile
+++ b/arch/riscv/boot/dts/allwinner/Makefile
@@ -1,2 +1,3 @@
 # SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1-nezha.dtb
 dtb-$(CONFIG_ARCH_SUNXI) += sun20i-d1s-mangopi-mq.dtb
diff --git a/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
new file mode 100644
index 000000000000..a0769185be97
--- /dev/null
+++ b/arch/riscv/boot/dts/allwinner/sun20i-d1-nezha.dts
@@ -0,0 +1,166 @@
+// SPDX-License-Identifier: (GPL-2.0+ or MIT)
+// Copyright (C) 2021-2022 Samuel Holland <samuel@sholland.org>
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/input/input.h>
+
+/dts-v1/;
+
+#include "sun20i-d1.dtsi"
+#include "sun20i-common-regulators.dtsi"
+
+/ {
+	model = "Allwinner D1 Nezha";
+	compatible = "allwinner,d1-nezha", "allwinner,sun20i-d1";
+
+	aliases {
+		ethernet0 = &emac;
+		ethernet1 = &xr829;
+		serial0 = &uart0;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	reg_usbvbus: usbvbus {
+		compatible = "regulator-fixed";
+		regulator-name = "usbvbus";
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+		gpio = <&pio 3 19 GPIO_ACTIVE_HIGH>; /* PD19 */
+		enable-active-high;
+		vin-supply = <&reg_vcc>;
+	};
+
+	/*
+	 * This regulator is PWM-controlled, but the PWM controller is not
+	 * yet supported, so fix the regulator to its default voltage.
+	 */
+	reg_vdd_cpu: vdd-cpu {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd-cpu";
+		regulator-min-microvolt = <1100000>;
+		regulator-max-microvolt = <1100000>;
+		vin-supply = <&reg_vcc>;
+	};
+
+	wifi_pwrseq: wifi-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		reset-gpios = <&pio 6 12 GPIO_ACTIVE_LOW>; /* PG12 */
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&reg_vdd_cpu>;
+};
+
+&dcxo {
+	clock-frequency = <24000000>;
+};
+
+&ehci0 {
+	status = "okay";
+};
+
+&ehci1 {
+	status = "okay";
+};
+
+&emac {
+	pinctrl-0 = <&rgmii_pe_pins>;
+	pinctrl-names = "default";
+	phy-handle = <&ext_rgmii_phy>;
+	phy-mode = "rgmii-id";
+	phy-supply = <&reg_vcc_3v3>;
+	status = "okay";
+};
+
+&i2c2 {
+	pinctrl-0 = <&i2c2_pb0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	pcf8574a: gpio@38 {
+		compatible = "nxp,pcf8574a";
+		reg = <0x38>;
+		interrupt-parent = <&pio>;
+		interrupts = <1 2 IRQ_TYPE_LEVEL_LOW>; /* PB2 */
+		interrupt-controller;
+		gpio-controller;
+		#gpio-cells = <2>;
+		#interrupt-cells = <2>;
+	};
+};
+
+&mdio {
+	ext_rgmii_phy: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+	};
+};
+
+&mmc0 {
+	bus-width = <4>;
+	cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>; /* PF6 */
+	disable-wp;
+	vmmc-supply = <&reg_vcc_3v3>;
+	vqmmc-supply = <&reg_vcc_3v3>;
+	pinctrl-0 = <&mmc0_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&mmc1 {
+	bus-width = <4>;
+	mmc-pwrseq = <&wifi_pwrseq>;
+	non-removable;
+	vmmc-supply = <&reg_vcc_3v3>;
+	vqmmc-supply = <&reg_vcc_3v3>;
+	pinctrl-0 = <&mmc1_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	xr829: wifi@1 {
+		reg = <1>;
+		interrupt-parent = <&pio>;
+		interrupts = <6 10 IRQ_TYPE_LEVEL_LOW>; /* PG10 */
+		interrupt-names = "host-wake";
+	};
+};
+
+&ohci0 {
+	status = "okay";
+};
+
+&ohci1 {
+	status = "okay";
+};
+
+&uart0 {
+	pinctrl-0 = <&uart0_pb8_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&uart1 {
+	uart-has-rtscts;
+	pinctrl-0 = <&uart1_pg6_pins>, <&uart1_pg8_rts_cts_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	/* XR829 bluetooth is connected here */
+};
+
+&usb_otg {
+	dr_mode = "otg";
+	status = "okay";
+};
+
+&usbphy {
+	usb0_id_det-gpios = <&pio 3 21 GPIO_ACTIVE_HIGH>; /* PD21 */
+	usb0_vbus_det-gpios = <&pio 3 20 GPIO_ACTIVE_HIGH>; /* PD20 */
+	usb0_vbus-supply = <&reg_usbvbus>;
+	usb1_vbus-supply = <&reg_vcc>;
+	status = "okay";
+};