rockchip: rk3568: Add support for FriendlyARM NanoPi R5S

FriendlyARM NanoPi R5S is an open-sourced mini IoT gateway device.

Board Specifications
- Rockchip RK3568
- 2 or 4GB LPDDR4X
- 8GB or 16GB eMMC, SD card slot
- GbE LAN (Native)
- 2x 2.5G LAN (PCIe)
- M.2 Connector
- HDMI 2.0, MIPI DSI/CSI
- 2xUSB 3.0 Host
- USB Type C PD, 5V/9V/12V
- GPIO: 12-pin 0.5mm FPC connector

The device tree is taken from kernel v6.4-rc1.

Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
Signed-off-by: Tianling Shen <cnsztl@gmail.com>
diff --git a/arch/arm/dts/rk3568-nanopi-r5s.dts b/arch/arm/dts/rk3568-nanopi-r5s.dts
new file mode 100644
index 0000000..b6ad832
--- /dev/null
+++ b/arch/arm/dts/rk3568-nanopi-r5s.dts
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-or-later OR MIT
+/*
+ * Copyright (c) 2022 FriendlyElec Computer Tech. Co., Ltd.
+ * (http://www.friendlyelec.com)
+ *
+ * Copyright (c) 2023 Tianling Shen <cnsztl@gmail.com>
+ */
+
+/dts-v1/;
+#include "rk3568-nanopi-r5s.dtsi"
+
+/ {
+	model = "FriendlyElec NanoPi R5S";
+	compatible = "friendlyarm,nanopi-r5s", "rockchip,rk3568";
+
+	aliases {
+		ethernet0 = &gmac0;
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&lan1_led_pin>, <&lan2_led_pin>, <&power_led_pin>, <&wan_led_pin>;
+
+		led-lan1 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			function-enumerator = <1>;
+			gpios = <&gpio3 RK_PD6 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-lan2 {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_LAN;
+			function-enumerator = <2>;
+			gpios = <&gpio3 RK_PD7 GPIO_ACTIVE_HIGH>;
+		};
+
+		power_led: led-power {
+			color = <LED_COLOR_ID_RED>;
+			function = LED_FUNCTION_POWER;
+			linux,default-trigger = "heartbeat";
+			gpios = <&gpio4 RK_PD2 GPIO_ACTIVE_HIGH>;
+		};
+
+		led-wan {
+			color = <LED_COLOR_ID_GREEN>;
+			function = LED_FUNCTION_WAN;
+			gpios = <&gpio2 RK_PC1 GPIO_ACTIVE_HIGH>;
+		};
+	};
+};
+
+&gmac0 {
+	assigned-clocks = <&cru SCLK_GMAC0_RX_TX>, <&cru SCLK_GMAC0>;
+	assigned-clock-parents = <&cru SCLK_GMAC0_RGMII_SPEED>, <&cru CLK_MAC0_2TOP>;
+	assigned-clock-rates = <0>, <125000000>;
+	clock_in_out = "output";
+	phy-handle = <&rgmii_phy0>;
+	phy-mode = "rgmii";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gmac0_miim
+		     &gmac0_tx_bus2
+		     &gmac0_rx_bus2
+		     &gmac0_rgmii_clk
+		     &gmac0_rgmii_bus>;
+	snps,reset-gpio = <&gpio0 RK_PC5 GPIO_ACTIVE_LOW>;
+	snps,reset-active-low;
+	/* Reset time is 15ms, 50ms for rtl8211f */
+	snps,reset-delays-us = <0 15000 50000>;
+	tx_delay = <0x3c>;
+	rx_delay = <0x2f>;
+	status = "okay";
+};
+
+&mdio0 {
+	rgmii_phy0: ethernet-phy@1 {
+		compatible = "ethernet-phy-ieee802.3-c22";
+		reg = <1>;
+		pinctrl-0 = <&eth_phy0_reset_pin>;
+		pinctrl-names = "default";
+	};
+};
+
+&pcie2x1 {
+	num-lanes = <1>;
+	reset-gpios = <&gpio0 RK_PB6 GPIO_ACTIVE_HIGH>;
+	status = "okay";
+};
+
+&pcie30phy {
+	data-lanes = <1 2>;
+	status = "okay";
+};
+
+&pcie3x1 {
+	num-lanes = <1>;
+	reset-gpios = <&gpio0 RK_PA0 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc3v3_pcie>;
+	status = "okay";
+};
+
+&pcie3x2 {
+	num-lanes = <1>;
+	num-ib-windows = <8>;
+	num-ob-windows = <8>;
+	reset-gpios = <&gpio2 RK_PD6 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc3v3_pcie>;
+	status = "okay";
+};
+
+&pinctrl {
+	gmac0 {
+		eth_phy0_reset_pin: eth-phy0-reset-pin {
+			rockchip,pins = <0 RK_PC4 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
+	gpio-leds {
+		lan1_led_pin: lan1-led-pin {
+			rockchip,pins = <3 RK_PD6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		lan2_led_pin: lan2-led-pin {
+			rockchip,pins = <3 RK_PD7 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		power_led_pin: power-led-pin {
+			rockchip,pins = <4 RK_PD2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		wan_led_pin: wan-led-pin {
+			rockchip,pins = <2 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};