[PATCH v2 3/3] arm64: dts: rockchip: Add devicetree for the FriendlyElec NanoPi R28S

["安容 via B4 Relay" <devnull+HystericalDragons.proton.me@kernel.org>]

From: 安容 <HystericalDragons@proton.me>

The NanoPi R28S is a dual gigabit Ethernet router board based on the
Rockchip RK3528 SoC, designed and developed by FriendlyElec. It shares
most of its design with the NanoPi Zero2, so it builds on the common
rk3528-nanopi.dtsi.

Specification:
- Rockchip RK3528
- 1GB RAM
- eMMC socket (optional)
- MicroSD slot
- 1x 1000Base-T (GMAC1, Realtek RTL8211F)
- 1x 1000Base-T (PCIe, Realtek RTL8111H)
- AICSemi AIC8800D80 SDIO WiFi
- 3x LEDs (SYS, LAN, WAN)
- 1x USB 2.0 Type-C, peripheral only, shared with the 5V power input
- User and MaskROM buttons
- Haoyu HYM8563 RTC
- 1x USB Type-C debug UART (onboard WCH CH340E)

Assisted-by: LLM
Signed-off-by: 安容 <HystericalDragons@proton.me>
---
 arch/arm64/boot/dts/rockchip/Makefile              |   1 +
 .../arm64/boot/dts/rockchip/rk3528-nanopi-r28s.dts | 142 +++++++++++++++++++++
 2 files changed, 143 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
index b677914cd3..51a9889088 100644
--- a/arch/arm64/boot/dts/rockchip/Makefile
+++ b/arch/arm64/boot/dts/rockchip/Makefile
@@ -94,6 +94,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399-vicharak-vaaman.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3399pro-rock-pi-n10.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-armsom-sige1.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-hinlink-h28k.dtb
+dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-nanopi-r28s.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-nanopi-zero2.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-radxa-e20c.dtb
 dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3528-rock-2a.dtb
diff --git a/arch/arm64/boot/dts/rockchip/rk3528-nanopi-r28s.dts b/arch/arm64/boot/dts/rockchip/rk3528-nanopi-r28s.dts
new file mode 100644
index 0000000000..b9e9f5af4e
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/rk3528-nanopi-r28s.dts
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2022 Rockchip Electronics Co., Ltd.
+ * Copyright (c) 2026 FriendlyElec Computer Tech. Co., Ltd.
+ * Copyright (c) 2026 安容 <HystericalDragons@proton.me>
+ */
+
+/dts-v1/;
+
+#include <dt-bindings/leds/common.h>
+#include "rk3528-nanopi.dtsi"
+
+/ {
+	model = "FriendlyElec NanoPi R28S";
+	compatible = "friendlyarm,nanopi-r28s", "rockchip,rk3528";
+
+	aliases {
+		mmc2 = &sdio0;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&usr_btn>;
+
+		button-user {
+			debounce-interval = <50>;
+			gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_LOW>;
+			label = "USER";
+			linux,code = <KEY_RESTART>;
+			wakeup-source;
+		};
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&led1>, <&led2>, <&led_sys>;
+
+		led-lan {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_LAN;
+			gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "netdev";
+		};
+
+		led-sys {
+			color = <LED_COLOR_ID_RED>;
+			default-state = "on";
+			function = LED_FUNCTION_HEARTBEAT;
+			gpios = <&gpio4 RK_PB0 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		led-wan {
+			color = <LED_COLOR_ID_GREEN>;
+			default-state = "off";
+			function = LED_FUNCTION_WAN;
+			gpios = <&gpio4 RK_PB1 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "netdev";
+		};
+	};
+
+	sdio_pwrseq: sdio-pwrseq {
+		compatible = "mmc-pwrseq-simple";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pwr_wf>;
+		post-power-on-delay-ms = <100>;
+		reset-gpios = <&gpio1 RK_PC2 GPIO_ACTIVE_LOW>;
+	};
+};
+
+&combphy {
+	status = "okay";
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_eth_perstb>;
+	reset-gpios = <&gpio4 RK_PC0 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc_3v3>;
+	status = "okay";
+};
+
+&pinctrl {
+	gpio-keys {
+		usr_btn: usr-btn {
+			rockchip,pins = <4 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
+	leds {
+		led1: led1 {
+			rockchip,pins = <4 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		led2: led2 {
+			rockchip,pins = <4 RK_PB3 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		led_sys: led-sys {
+			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	pcie {
+		pcie_eth_perstb: pcie-eth-perstb {
+			rockchip,pins = <4 RK_PC0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	wifi {
+		pwr_wf: pwr-wf {
+			rockchip,pins = <1 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
+&sdio0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&sdio_pwrseq>;
+	non-removable;
+	sd-uhs-sdr104;
+	vqmmc-supply = <&vcc_1v8>;
+	status = "okay";
+};
+
+&uart2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2m1_xfer>, <&uart2m1_ctsn>, <&uart2m1_rtsn>;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&usb_host0_xhci {
+	/* Type-C port, shared with the 5V power input */
+	dr_mode = "peripheral";
+};

-- 
2.55.0