[PATCH V3, 1/1] arm64: dts: rockchip: add ROCK Pi S DTS support

[Akash Gajjar <akash@openedev.com>]

ROCK Pi S is RK3308 based SBC from radxa.com. ROCK Pi S has a,
- 256MB/512MB DDR3 RAM
- SD, NAND flash (optional on board 1/2/4/8Gb)
- 100MB ethernet, PoE (optional)
- Onboard 802.11 b/g/n wifi + Bluetooth 4.0 Module
- USB2.0 Type-A HOST x1
- USB3.0 Type-C OTG x1
- 26-pin expansion header
- USB Type-C DC 5V Power Supply

This patch enables
- Console
- NAND Flash
- SD Card

Signed-off-by: Akash Gajjar <akash@openedev.com>
---
Changes for v2
- Use pwm-supply for vdd_core node instead of vi-supply
- Add USB2.0 node support
 
Changes for v3
- Use small S on dts file name
- Add missing semicolon
- Remove USB2.0 node support

 .../devicetree/bindings/arm/rockchip.yaml     |   5 +
 arch/arm64/boot/dts/rockchip/Makefile         |   1 +
 .../boot/dts/rockchip/rk3308-rock-pi-s.dts    | 221 ++++++++++++++++++
 3 files changed, 227 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts

diff --git a/Documentation/devicetree/bindings/arm/rockchip.yaml b/Documentation/devicetree/bindings/arm/rockchip.yaml
index d9847b306b83..48d40c928d45 100644
--- a/Documentation/devicetree/bindings/arm/rockchip.yaml
+++ b/Documentation/devicetree/bindings/arm/rockchip.yaml
@@ -422,6 +422,11 @@ properties:
           - const: radxa,rockpi4
           - const: rockchip,rk3399
 
+      - description: Radxa ROCK Pi S
+        items:
+          - const: radxa,rockpis
+          - const: rockchip,rk3308
+
       - description: Radxa Rock2 Square
         items:
           - const: radxa,rock2-square
diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index 48fb631d5451..e56a5527bab4 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -2,6 +2,7 @@
 dtb-$(CONFIG_ARCH_ROCKCHIP) += px30-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-roc-cc.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3308-rock-pi-s.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-a1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-evb.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3328-rock64.dtb
diff --git a/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts b/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts
new file mode 100644
index 000000000000..4fccae43f008
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3308-rock-pi-s.dts
@@ -0,0 +1,221 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2019 Akash Gajjar <akash@openedev.com>
+ * Copyright (c) 2019 Jagan Teki <jagan@openedev.com>
+ */
+
+/dts-v1/;
+#include "rk3308.dtsi"
+
+/ {
+	model = "Radxa ROCK Pi S";
+	compatible = "radxa,rockpis", "rockchip,rk3308";
+
+	chosen {
+		stdout-path = "serial0:1500000n8";
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&green_led_gio>, <&heartbeat_led_gpio>;
+
+		green-led {
+			label = "rockpis:green:power";
+			gpios = <&gpio0 RK_PA6 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "default-on";
+			default-state = "on";
+		};
+
+		blue-led {
+			label = "rockpis:blue:user";
+			gpios = <&gpio0 RK_PA5 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+			linux,default-trigger = "heartbeat";
+		};
+	};
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		pinctrl-names = "default";
+		pinctrl-0 = <&wifi_enable_h>;
+		reset-gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_LOW>;
+	};
+
+	vcc5v0_sys: vcc5v0-sys {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0_sys";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <5000000>;
+		regulator-max-microvolt = <5000000>;
+	};
+
+	vdd_core: vdd-core {
+		compatible = "pwm-regulator";
+		pwms = <&pwm0 0 5000 1>;
+		regulator-name = "vdd_core";
+		regulator-min-microvolt = <827000>;
+		regulator-max-microvolt = <1340000>;
+		regulator-init-microvolt = <1015000>;
+		regulator-settling-time-up-us = <250>;
+		regulator-always-on;
+		regulator-boot-on;
+		pwm-supply = <&vcc5v0_sys>;
+	};
+
+	vdd_log: vdd-log {
+		compatible = "regulator-fixed";
+		regulator-name = "vdd_log";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <1050000>;
+		regulator-max-microvolt = <1050000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	vcc_ddr: vcc-ddr {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_ddr";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <1500000>;
+		regulator-max-microvolt = <1500000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	vcc_1v8: vcc-1v8 {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_1v8";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <1800000>;
+		regulator-max-microvolt = <1800000>;
+		vin-supply = <&vcc_io>;
+	};
+
+	vcc_io: vcc-io {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc_io";
+		regulator-always-on;
+		regulator-boot-on;
+		regulator-min-microvolt = <3300000>;
+		regulator-max-microvolt = <3300000>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+
+	vcc5v0_otg: vcc5v0-otg {
+		compatible = "regulator-fixed";
+		regulator-name = "vcc5v0_otg";
+		regulator-always-on;
+		gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+		pinctrl-names = "default";
+		pinctrl-0 = <&otg_vbus_drv>;
+		vin-supply = <&vcc5v0_sys>;
+	};
+};
+
+&cpu0 {
+	cpu-supply = <&vdd_core>;
+};
+
+&emmc {
+	bus-width = <4>;
+	cap-mmc-highspeed;
+	mmc-hs200-1_8v;
+	supports-sd;
+	disable-wp;
+	non-removable;
+	num-slots = <1>;
+	vin-supply = <&vcc_io>;
+	status = "okay";
+};
+
+&i2c1 {
+	status = "okay";
+};
+
+&sdmmc {
+	bus-width = <4>;
+	cap-mmc-highspeed;
+	cap-sd-highspeed;
+	max-frequeency = <150000000>;
+	supports-sd;
+	disable-wp;
+	num-slots = <1>;
+	pinctrl-0 = <&sdmmc_clk &sdmmc_cmd &sdmmc_det &sdmmc_bus4>;
+	card-detect-delay = <800>;
+	status = "okay";
+};
+
+&spi2 {
+	status = "okay";
+	max-freq = <10000000>;
+};
+
+&pinctrl {
+	pinctrl-names = "default";
+	pinctrl-0 = <&rtc_32k>;
+
+	leds {
+		green_led_gio: green-led-gpio {
+			rockchip,pins = <0 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		heartbeat_led_gpio: heartbeat-led-gpio {
+			rockchip,pins = <0 RK_PA5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	usb {
+		otg_vbus_drv: otg-vbus-drv {
+			rockchip,pins = <0 RK_PC5 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	sdio-pwrseq {
+		wifi_enable_h: wifi-enable-h {
+			rockchip,pins = <0 RK_PA2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		wifi_host_wake: wifi-host-wake {
+			rockchip,pins = <0 RK_PA0 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+	};
+};
+
+&pwm0 {
+	status = "okay";
+	pinctrl-0 = <&pwm0_pin_pull_down>;
+};
+
+&saradc {
+	vref-supply = <&vcc_1v8>;
+	status = "okay";
+};
+
+&sdio {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	bus-width = <4>;
+	max-frequency = <1000000>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	supports-sdio;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&sdio_pwrseq>;
+	non-removable;
+	sd-uhs-sdr104;
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+};
+
+&uart4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart4_xfer &uart4_rts &uart4_cts>;
+	status = "okay";
+};
-- 
2.17.1