rockchip: rk3528: Add FriendlyElec NanoPi R28S

index a799bb843f7..a1f000b1bee 100644
@@ -340,6 +340,13 @@ properties:
               - friendlyarm,nanopi-r2s-plus
           - const: rockchip,rk3328
 
+      - description: FriendlyElec NanoPi RK3528 series boards
+        items:
+          - enum:
+              - friendlyarm,nanopi-r28s
+              - friendlyarm,nanopi-zero2
+          - const: rockchip,rk3528
+
       - description: FriendlyElec NanoPi R3S
         items:
           - const: friendlyarm,nanopi-r3s

@@ -381,11 +388,6 @@ properties:
           - const: friendlyarm,nanopi-r76s
           - const: rockchip,rk3576
 
-      - description: FriendlyElec NanoPi Zero2
-        items:
-          - const: friendlyarm,nanopi-zero2
-          - const: rockchip,rk3528
-
       - description: FriendlyElec NanoPC T6 series boards
         items:
           - enum:

index 97d85124d21..05ae03622e8 100644
@@ -2,41 +2,12 @@
 
 /dts-v1/;
 
-#include <dt-bindings/input/input.h>
-#include <dt-bindings/leds/common.h>
-#include <dt-bindings/pwm/pwm.h>
-#include "rk3528.dtsi"
+#include "rk3528-nanopi.dtsi"
 
 / {
 	model = "FriendlyElec NanoPi Zero2";
 	compatible = "friendlyarm,nanopi-zero2", "rockchip,rk3528";
 
-	aliases {
-		ethernet0 = &gmac1;
-		i2c1 = &i2c1;
-		mmc0 = &sdhci;
-		mmc1 = &sdmmc;
-		serial0 = &uart0;
-	};
-
-	chosen {
-		stdout-path = "serial0:1500000n8";
-	};
-
-	adc-keys-0 {
-		compatible = "adc-keys";
-		io-channels = <&saradc 0>;
-		io-channel-names = "buttons";
-		keyup-threshold-microvolt = <1800000>;
-		poll-interval = <100>;
-
-		button-maskrom {
-			label = "MASK";
-			linux,code = <KEY_SETUP>;
-			press-threshold-microvolt = <0>;
-		};
-	};
-
 	adc-keys-1 {
 		compatible = "adc-keys";
 		io-channels = <&saradc 1>;

@@ -51,28 +22,6 @@
 		};
 	};
 
-	leds {
-		compatible = "gpio-leds";
-		pinctrl-names = "default";
-		pinctrl-0 = <&led1>, <&led_sys>;
-
-		led-0 {
-			color = <LED_COLOR_ID_RED>;
-			default-state = "on";
-			function = LED_FUNCTION_HEARTBEAT;
-			gpios = <&gpio4 RK_PB0 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "heartbeat";
-		};
-
-		led-1 {
-			color = <LED_COLOR_ID_GREEN>;
-			default-state = "on";
-			function = LED_FUNCTION_STATUS;
-			gpios = <&gpio4 RK_PB1 GPIO_ACTIVE_HIGH>;
-			linux,default-trigger = "default-on";
-		};
-	};
-
 	vcc0v6_ddr: regulator-0v6-vcc-ddr {
 		compatible = "regulator-fixed";
 		regulator-name = "vcc0v6_ddr";

@@ -83,66 +32,6 @@
 		vin-supply = <&vcc5v0_sys>;
 	};
 
-	vdd_0v9: regulator-0v9-vdd {
-		compatible = "regulator-fixed";
-		regulator-name = "vdd_0v9";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <900000>;
-		regulator-max-microvolt = <900000>;
-		vin-supply = <&vcc5v0_sys>;
-	};
-
-	vcc_ddr: regulator-1v1-vcc-ddr {
-		compatible = "regulator-fixed";
-		regulator-name = "vcc_ddr";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <1100000>;
-		regulator-max-microvolt = <1100000>;
-		vin-supply = <&vcc5v0_sys>;
-	};
-
-	vcc_1v8: regulator-1v8-vcc {
-		compatible = "regulator-fixed";
-		regulator-name = "vcc_1v8";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <1800000>;
-		regulator-max-microvolt = <1800000>;
-		vin-supply = <&vcc_3v3>;
-	};
-
-	vcc_3v3: regulator-3v3-vcc {
-		compatible = "regulator-fixed";
-		regulator-name = "vcc_3v3";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		vin-supply = <&vcc5v0_sys>;
-	};
-
-	vcc3v3_sd: regulator-3v3-vcc-sd {
-		compatible = "regulator-fixed";
-		gpios = <&gpio4 RK_PA1 GPIO_ACTIVE_LOW>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&sdmmc_pwren_l>;
-		regulator-name = "vcc3v3_sd";
-		regulator-min-microvolt = <3300000>;
-		regulator-max-microvolt = <3300000>;
-		vin-supply = <&vcc_3v3>;
-	};
-
-	vcc5v0_sys: regulator-5v0-vcc-sys {
-		compatible = "regulator-fixed";
-		regulator-name = "vcc5v0_sys";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <5000000>;
-		regulator-max-microvolt = <5000000>;
-	};
-
 	usb2_host_5v: regulator-5v0-usb2-host {
 		compatible = "regulator-fixed";
 		enable-active-high;

@@ -154,138 +43,15 @@
 		regulator-max-microvolt = <5000000>;
 		vin-supply = <&vcc5v0_sys>;
 	};
-
-	vccio_sd: regulator-vccio-sd {
-		compatible = "regulator-gpio";
-		gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&sdmmc_vol_ctrl_h>;
-		regulator-name = "vccio_sd";
-		regulator-min-microvolt = <1800000>;
-		regulator-max-microvolt = <3300000>;
-		states = <1800000 0x0>, <3300000 0x1>;
-		vin-supply = <&vcc5v0_sys>;
-	};
-
-	vdd_arm: regulator-vdd-arm {
-		compatible = "pwm-regulator";
-		pwms = <&pwm1 0 5000 PWM_POLARITY_INVERTED>;
-		pwm-supply = <&vcc5v0_sys>;
-		regulator-name = "vdd_arm";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <746000>;
-		regulator-max-microvolt = <1201000>;
-		regulator-settling-time-up-us = <250>;
-	};
-
-	vdd_logic: regulator-vdd-logic {
-		compatible = "pwm-regulator";
-		pwms = <&pwm2 0 5000 PWM_POLARITY_INVERTED>;
-		pwm-supply = <&vcc5v0_sys>;
-		regulator-name = "vdd_logic";
-		regulator-always-on;
-		regulator-boot-on;
-		regulator-min-microvolt = <705000>;
-		regulator-max-microvolt = <1006000>;
-		regulator-settling-time-up-us = <250>;
-	};
-};
-
-&cpu0 {
-	cpu-supply = <&vdd_arm>;
-};
-
-&cpu1 {
-	cpu-supply = <&vdd_arm>;
-};
-
-&cpu2 {
-	cpu-supply = <&vdd_arm>;
-};
-
-&cpu3 {
-	cpu-supply = <&vdd_arm>;
 };
 
-&gmac1 {
-	clock_in_out = "output";
-	phy-handle = <&rgmii_phy>;
-	phy-mode = "rgmii-id";
-	phy-supply = <&vcc_3v3>;
-	pinctrl-names = "default";
-	pinctrl-0 = <&rgmii_miim>, <&rgmii_tx_bus2>, <&rgmii_rx_bus2>,
-		    <&rgmii_rgmii_clk>, <&rgmii_rgmii_bus>;
-	status = "okay";
-};
-
-&gpu {
-	mali-supply = <&vdd_logic>;
-	status = "okay";
-};
-
-&i2c1 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&i2c1m0_xfer>;
-	status = "okay";
-
-	hym8563: rtc@51 {
-		compatible = "haoyu,hym8563";
-		reg = <0x51>;
-		#clock-cells = <0>;
-		interrupt-parent = <&gpio4>;
-		interrupts = <RK_PC1 IRQ_TYPE_LEVEL_LOW>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&rtc_int_l>;
-		wakeup-source;
-	};
-};
-
-&mdio1 {
-	rgmii_phy: ethernet-phy@1 {
-		compatible = "ethernet-phy-ieee802.3-c22";
-		reg = <0x1>;
-		pinctrl-names = "default";
-		pinctrl-0 = <&gmac1_rstn_l>;
-		reset-assert-us = <20000>;
-		reset-deassert-us = <100000>;
-		reset-gpios = <&gpio4 RK_PC2 GPIO_ACTIVE_LOW>;
-	};
+&led1 {
+	default-state = "on";
+	function = LED_FUNCTION_STATUS;
+	linux,default-trigger = "default-on";
 };
 
 &pinctrl {
-	ethernet {
-		gmac1_rstn_l: gmac1-rstn-l {
-			rockchip,pins = <4 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-	};
-
-	leds {
-		led1: led1 {
-			rockchip,pins = <4 RK_PB1 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-
-		led_sys: led-sys {
-			rockchip,pins = <4 RK_PB0 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-	};
-
-	rtc {
-		rtc_int_l: rtc-int-l {
-			rockchip,pins = <4 RK_PC1 RK_FUNC_GPIO &pcfg_pull_up>;
-		};
-	};
-
-	sdmmc {
-		sdmmc_vol_ctrl_h: sdmmc-vol-ctrl-h {
-			rockchip,pins = <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-
-		sdmmc_pwren_l: sdmmc-pwren-l {
-			rockchip,pins = <4 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
-		};
-	};
-
 	usb {
 		usb20_host1_pwren: usb20-host1-pwren {
 			rockchip,pins = <4 RK_PB5 RK_FUNC_GPIO &pcfg_pull_none>;

@@ -293,52 +59,6 @@
 	};
 };
 
-&pwm1 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pwm1m0_pins>;
-	status = "okay";
-};
-
-&pwm2 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pwm2m0_pins>;
-	status = "okay";
-};
-
-&saradc {
-	vref-supply = <&vcc_1v8>;
-	status = "okay";
-};
-
-&sdhci {
-	bus-width = <8>;
-	cap-mmc-highspeed;
-	mmc-hs200-1_8v;
-	no-sd;
-	no-sdio;
-	non-removable;
-	vmmc-supply = <&vcc_3v3>;
-	vqmmc-supply = <&vcc_1v8>;
-	status = "okay";
-};
-
-&sdmmc {
-	bus-width = <4>;
-	cap-mmc-highspeed;
-	cap-sd-highspeed;
-	disable-wp;
-	sd-uhs-sdr104;
-	vmmc-supply = <&vcc3v3_sd>;
-	vqmmc-supply = <&vccio_sd>;
-	status = "okay";
-};
-
-&uart0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart0m0_xfer>;
-	status = "okay";
-};
-
 &usb_host0_ehci {
 	status = "okay";
 };

291 lines not on this page · raw message

new file mode 100644
index 00000000000..294b66f60e4
@@ -0,0 +1,160 @@
+// 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 <[email protected]>
+ */
+
+/dts-v1/;
+
+#include "rk3528-nanopi.dtsi"
+
+/ {
+	model = "FriendlyElec NanoPi R28S";
+	compatible = "friendlyarm,nanopi-r28s", "rockchip,rk3528";
+
+	aliases {
+		mmc2 = &sdio0;
+		serial2 = &uart2;
+	};
+
+	gpio-keys {
+		compatible = "gpio-keys";
+		pinctrl-names = "default";
+		pinctrl-0 = <&gpio4_b2_usr_btn>;
+
+		button-user {
+			debounce-interval = <50>;
+			gpios = <&gpio4 RK_PB2 GPIO_ACTIVE_LOW>;
+			label = "USER";
+			linux,code = <BTN_1>;
+			wakeup-source;
+		};
+	};
+
+	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";
+};
+
+&led1 {
+	default-state = "off";
+	function = LED_FUNCTION_WAN;
+	linux,default-trigger = "netdev";
+};
+
+&leds {
+	pinctrl-names = "default";
+	pinctrl-0 = <&led_sys_pin>, <&led1_pin>, <&led2_pin>;
+
+	led-2 {
+		color = <LED_COLOR_ID_GREEN>;
+		default-state = "off";
+		function = LED_FUNCTION_LAN;
+		gpios = <&gpio4 RK_PB3 GPIO_ACTIVE_HIGH>;
+		linux,default-trigger = "netdev";
+	};
+};
+
+&pcie {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pcie_eth_perstb>;
+	reset-gpios = <&gpio4 RK_PC0 GPIO_ACTIVE_HIGH>;
+	vpcie3v3-supply = <&vcc_3v3>;
+	status = "okay";
+};
+
+&pinctrl {
+	bluetooth {
+		bt_wake_host: bt-wake-host {
+			rockchip,pins = <1 RK_PB5 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+
+		host_wake_bt: host-wake-bt {
+			rockchip,pins = <1 RK_PB4 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+
+	gpio-keys {
+		gpio4_b2_usr_btn: gpio4-b2-usr-btn {
+			rockchip,pins = <4 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>;
+		};
+	};
+
+	leds {
+		led2_pin: led2-pin {
+			rockchip,pins = <4 RK_PB3 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 {
+		host_wake_wl: host-wake-wl {
+			rockchip,pins = <1 RK_PA6 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		pwr_wf: pwr-wf {
+			rockchip,pins = <1 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+
+		wl_wake_host: wl-wake-host {
+			rockchip,pins = <1 RK_PA7 RK_FUNC_GPIO &pcfg_pull_down>;
+		};
+	};
+};
+
+&sdio0 {
+	bus-width = <4>;
+	cap-sd-highspeed;
+	cap-sdio-irq;
+	keep-power-in-suspend;
+	mmc-pwrseq = <&sdio_pwrseq>;
+	no-mmc;
+	no-sd;
+	non-removable;
+	sd-uhs-sdr104;
+	vmmc-supply = <&vcc_3v3>;
+	vqmmc-supply = <&vcc_1v8>;
+	status = "okay";
+};
+
+&uart2 {
+	dma-names = "tx", "rx";
+	pinctrl-names = "default";
+	pinctrl-0 = <&uart2m1_xfer>, <&uart2m1_ctsn>, <&uart2m1_rtsn>;
+	uart-has-rtscts;
+	status = "okay";
+};
+
+&usb_host0_xhci {
+	/*
+	 * The Type-C port is also the 5V power input, so it comes up as a
+	 * device, but host mode works with an externally powered hub.
+	 */
+	extcon = <&usb2phy>;
+	maximum-speed = "high-speed";
+	phys = <&usb2phy_otg>;
+	phy-names = "usb2-phy";
+	status = "okay";
+};
+
+&usb2phy {
+	status = "okay";
+};
+
+&usb2phy_otg {
+	status = "okay";
+};

new file mode 100644
index 00000000000..3e2fbd81da1
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk3528-u-boot.dtsi"
+
+&vdd_arm {
+	regulator-init-microvolt = <953000>;
+};
+
+&vdd_logic {
+	regulator-init-microvolt = <900000>;
+};

index 3e2fbd81da1..151f1872fed 100644
@@ -1,11 +1,3 @@
 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
 
-#include "rk3528-u-boot.dtsi"
-
-&vdd_arm {
-	regulator-init-microvolt = <953000>;
-};
-
-&vdd_logic {
-	regulator-init-microvolt = <900000>;
-};
+#include "rk3528-nanopi-u-boot.dtsi"

index 95543b40dd3..d1810fb0528 100644
@@ -13,6 +13,7 @@ F:	configs/hinlink-h28k-rk3528_defconfig
 NANOPI-ZERO2-RK3528
 M:	Jonas Karlman <[email protected]>
 S:	Maintained
+F:	arch/arm/dts/rk3528-nanopi-u-boot.dtsi
 F:	arch/arm/dts/rk3528-nanopi-zero2*
 F:	configs/nanopi-zero2-rk3528_defconfig
 

index 3e2fbd81da1..e8c8dc2f032 100644
@@ -2,6 +2,11 @@
 
 #include "rk3528-u-boot.dtsi"
 
+&saradc {
+	bootph-pre-ram;
+	vdd-microvolts = <1800000>;
+};
+
 &vdd_arm {
 	regulator-init-microvolt = <953000>;
 };

index 480ac2942ff..87b65d666e9 100644
@@ -1,5 +1,10 @@
 if ROCKCHIP_RK3528
 
+config TARGET_NANOPI_RK3528
+	bool "FriendlyElec NanoPi Zero2"
+	help
+	  FriendlyElec NanoPi Zero2 single board computer with a RK3528A SoC.
+
 config TARGET_RADXA_ROCK_2_RK3528
 	bool "Radxa ROCK 2A/2F"
 	help

@@ -14,6 +19,7 @@ config ROCKCHIP_STIMER_BASE
 config SYS_SOC
 	default "rk3528"
 
+source "board/friendlyelec/nanopi-rk3528/Kconfig"
 source "board/radxa/rock-2-rk3528/Kconfig"
 
 config SYS_CONFIG_NAME

index d1810fb0528..e56108d67cb 100644
@@ -10,13 +10,6 @@ S:	Maintained
 F:	arch/arm/dts/rk3528-hinlink-h28k*
 F:	configs/hinlink-h28k-rk3528_defconfig
 
-NANOPI-ZERO2-RK3528
-M:	Jonas Karlman <[email protected]>
-S:	Maintained
-F:	arch/arm/dts/rk3528-nanopi-u-boot.dtsi
-F:	arch/arm/dts/rk3528-nanopi-zero2*
-F:	configs/nanopi-zero2-rk3528_defconfig
-
 RADXA-E20C
 M:	Jonas Karlman <[email protected]>
 S:	Maintained

new file mode 100644
index 00000000000..94b15b06691
@@ -0,0 +1,14 @@
+if TARGET_NANOPI_RK3528
+
+config SYS_BOARD
+	default "nanopi-rk3528"
+
+config SYS_VENDOR
+	default "friendlyelec"
+
+config BOARD_SPECIFIC_OPTIONS # dummy
+	def_bool y
+	select ADC
+	select SPL_ADC
+
+endif

new file mode 100644
index 00000000000..67f14661087
@@ -0,0 +1,7 @@
+NANOPI-RK3528
+M:	Jonas Karlman <[email protected]>
+S:	Maintained
+F:	board/friendlyelec/nanopi-rk3528
+F:	arch/arm/dts/rk3528-nanopi-u-boot.dtsi
+F:	arch/arm/dts/rk3528-nanopi-zero2*
+F:	configs/nanopi-zero2-rk3528_defconfig

new file mode 100644
index 00000000000..752426dcfdb
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0+
+
+obj-y += nanopi-rk3528.o

index 2c725380ef4..dde9134112f 100644
@@ -4,6 +4,7 @@ CONFIG_COUNTER_FREQUENCY=24000000
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3528-nanopi-zero2"
 CONFIG_ROCKCHIP_RK3528=y
+CONFIG_TARGET_NANOPI_RK3528=y
 CONFIG_SYS_LOAD_ADDR=0xc00800
 CONFIG_DEBUG_UART_BASE=0xFF9F0000
 CONFIG_DEBUG_UART_CLOCK=24000000

new file mode 100644
index 00000000000..151f1872fed
@@ -0,0 +1,3 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+#include "rk3528-nanopi-u-boot.dtsi"

index 87b65d666e9..6e934408e56 100644
@@ -1,9 +1,10 @@
 if ROCKCHIP_RK3528
 
 config TARGET_NANOPI_RK3528
-	bool "FriendlyElec NanoPi Zero2"
+	bool "FriendlyElec NanoPi R28S/Zero2"
 	help
-	  FriendlyElec NanoPi Zero2 single board computer with a RK3528A SoC.
+	  FriendlyElec NanoPi R28S/Zero2 single board computers with a RK3528A
+	  SoC.
 
 config TARGET_RADXA_ROCK_2_RK3528
 	bool "Radxa ROCK 2A/2F"

index 67f14661087..c2e3bbba6d7 100644
@@ -1,7 +1,9 @@
 NANOPI-RK3528
 M:	Jonas Karlman <[email protected]>
+M:	安容 <[email protected]>
 S:	Maintained
 F:	board/friendlyelec/nanopi-rk3528
 F:	arch/arm/dts/rk3528-nanopi-u-boot.dtsi
+F:	arch/arm/dts/rk3528-nanopi-r28s*
 F:	arch/arm/dts/rk3528-nanopi-zero2*
 F:	configs/nanopi-zero2-rk3528_defconfig

index dde9134112f..0af811d0ea2 100644
@@ -28,9 +28,11 @@ CONFIG_CMD_USB_MASS_STORAGE=y
 CONFIG_CMD_RNG=y
 CONFIG_CMD_REGULATOR=y
 # CONFIG_SPL_DOS_PARTITION is not set
+CONFIG_OF_LIST="rockchip/rk3528-nanopi-zero2 rockchip/rk3528-nanopi-r28s"
 CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
 CONFIG_BUTTON=y
 CONFIG_BUTTON_ADC=y
+CONFIG_BUTTON_GPIO=y
 # CONFIG_USB_FUNCTION_FASTBOOT is not set
 CONFIG_ROCKCHIP_GPIO=y
 CONFIG_LED=y

index e22c2d6c575..bf02b700b0d 100644
@@ -103,7 +103,7 @@ List of mainline supported Rockchip boards:
 
 * rk3528
      - ArmSoM Sige1 (sige1-rk3528)
-     - FriendlyElec NanoPi Zero2 (nanopi-zero2-rk3528)
+     - FriendlyElec NanoPi R28S/Zero2 (nanopi-zero2-rk3528)
      - Generic RK3528 (generic-rk3528)
      - HINLINK H28K (hinlink-h28k-rk3528)
      - Radxa E20C (radxa-e20c-rk3528)