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@@ -0,0 +1,378 @@
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+From df056584b1825957ad118b6c1084aae00b1fa0b7 Mon Sep 17 00:00:00 2001
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+From: Chukun Pan <[email protected]>
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+Date: Wed, 3 Dec 2025 20:03:22 +0800
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+Subject: [PATCH] board: rockchip: add HINLINK H28K
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+
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+The HINLINK H28K is a single board computer based on the
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+RK3528 SoC. Add support for the HINLINK H28K board.
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+
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+Features tested on HINLINK H28K:
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+- SD-card boot
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+- eMMC boot
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+- Ethernet
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+
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+Signed-off-by: Chukun Pan <[email protected]>
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+---
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+
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+--- /dev/null
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++++ b/arch/arm/dts/rk3528-hinlink-h28k-u-boot.dtsi
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+@@ -0,0 +1,11 @@
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++// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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++
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++#include "rk3528-u-boot.dtsi"
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++
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++&vdd_arm {
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++ regulator-init-microvolt = <953000>;
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++};
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++
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++&vdd_logic {
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++ regulator-init-microvolt = <900000>;
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++};
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+--- /dev/null
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++++ b/configs/hinlink-h28k-rk3528_defconfig
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+@@ -0,0 +1,64 @@
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++CONFIG_ARM=y
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++CONFIG_SKIP_LOWLEVEL_INIT=y
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++CONFIG_COUNTER_FREQUENCY=24000000
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++CONFIG_ARCH_ROCKCHIP=y
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++CONFIG_DEFAULT_DEVICE_TREE="rockchip/rk3528-hinlink-h28k"
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++CONFIG_ROCKCHIP_RK3528=y
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++CONFIG_SYS_LOAD_ADDR=0xc00800
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++CONFIG_DEBUG_UART_BASE=0xFF9F0000
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++CONFIG_DEBUG_UART_CLOCK=24000000
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++CONFIG_DEBUG_UART=y
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++CONFIG_DEFAULT_FDT_FILE="rockchip/rk3528-hinlink-h28k.dtb"
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++# CONFIG_DISPLAY_CPUINFO is not set
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++CONFIG_BOARD_RNG_SEED=y
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++CONFIG_SPL_MAX_SIZE=0x40000
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++# CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
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++CONFIG_CMD_MEMINFO=y
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++CONFIG_CMD_MEMINFO_MAP=y
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++CONFIG_CMD_ADC=y
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++CONFIG_CMD_GPIO=y
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++CONFIG_CMD_GPT=y
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++CONFIG_CMD_MISC=y
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++CONFIG_CMD_MMC=y
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++CONFIG_CMD_USB=y
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++CONFIG_CMD_ROCKUSB=y
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++CONFIG_CMD_USB_MASS_STORAGE=y
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++# CONFIG_CMD_SETEXPR is not set
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++CONFIG_CMD_RNG=y
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++CONFIG_CMD_REGULATOR=y
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++# CONFIG_SPL_DOS_PARTITION is not set
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++CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
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++CONFIG_BUTTON=y
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++CONFIG_BUTTON_ADC=y
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++# CONFIG_USB_FUNCTION_FASTBOOT is not set
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++CONFIG_ROCKCHIP_GPIO=y
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++CONFIG_LED=y
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++CONFIG_LED_GPIO=y
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++CONFIG_SUPPORT_EMMC_RPMB=y
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++CONFIG_MMC_DW=y
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++CONFIG_MMC_DW_ROCKCHIP=y
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++CONFIG_MMC_SDHCI=y
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++CONFIG_MMC_SDHCI_SDMA=y
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++CONFIG_MMC_SDHCI_ROCKCHIP=y
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++CONFIG_PHY_REALTEK=y
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++CONFIG_DM_MDIO=y
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++CONFIG_DWC_ETH_QOS=y
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++CONFIG_DWC_ETH_QOS_ROCKCHIP=y
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++CONFIG_PHY_ROCKCHIP_INNO_USB2=y
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++CONFIG_PHY_ROCKCHIP_NANENG_COMBOPHY=y
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++CONFIG_REGULATOR_PWM=y
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++CONFIG_DM_REGULATOR_GPIO=y
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++CONFIG_PWM_ROCKCHIP=y
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++CONFIG_BAUDRATE=1500000
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++CONFIG_DEBUG_UART_SHIFT=2
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++CONFIG_SYS_NS16550_MEM32=y
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++CONFIG_USB=y
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++CONFIG_USB_XHCI_HCD=y
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++CONFIG_USB_EHCI_HCD=y
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++CONFIG_USB_EHCI_GENERIC=y
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++CONFIG_USB_DWC3=y
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++CONFIG_USB_DWC3_GENERIC=y
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++CONFIG_USB_GADGET=y
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++CONFIG_USB_GADGET_DOWNLOAD=y
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++CONFIG_USB_FUNCTION_ROCKUSB=y
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++CONFIG_ERRNO_STR=y
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+--- /dev/null
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++++ b/dts/upstream/src/arm64/rockchip/rk3528-hinlink-h28k.dts
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+@@ -0,0 +1,278 @@
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++// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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++
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++/dts-v1/;
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++
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++#include <dt-bindings/input/input.h>
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++#include <dt-bindings/leds/common.h>
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++#include <dt-bindings/pwm/pwm.h>
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++#include "rk3528.dtsi"
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++
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++/ {
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++ model = "HINLINK H28K";
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++ compatible = "hinlink,h28k", "rockchip,rk3528";
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++
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++ aliases {
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++ ethernet0 = &gmac1;
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++ mmc0 = &sdhci;
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++ mmc1 = &sdmmc;
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++ serial0 = &uart0;
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++ };
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++
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++ chosen {
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++ stdout-path = "serial0:1500000n8";
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++ };
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++
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++ keys {
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++ compatible = "adc-keys";
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++ io-channels = <&saradc 0>;
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++ io-channel-names = "buttons";
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++ keyup-threshold-microvolt = <1800000>;
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++ poll-interval = <100>;
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++
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++ button-boot {
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++ label = "BOOT";
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++ linux,code = <KEY_SETUP>;
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++ press-threshold-microvolt = <0>;
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++ };
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++ };
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++
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++ leds {
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++ compatible = "gpio-leds";
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&lan_led>, <&wan_led>, <&work_led>;
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++
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++ led-0 {
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++ color = <LED_COLOR_ID_AMBER>;
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++ function = LED_FUNCTION_LAN;
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++ gpios = <&gpio4 RK_PC1 GPIO_ACTIVE_LOW>;
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++ linux,default-trigger = "netdev";
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++ };
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++
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++ led-1 {
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++ color = <LED_COLOR_ID_BLUE>;
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++ function = LED_FUNCTION_WAN;
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++ gpios = <&gpio4 RK_PC0 GPIO_ACTIVE_LOW>;
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++ linux,default-trigger = "netdev";
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++ };
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++
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++ led-2 {
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++ color = <LED_COLOR_ID_GREEN>;
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++ function = LED_FUNCTION_STATUS;
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++ gpios = <&gpio4 RK_PB7 GPIO_ACTIVE_LOW>;
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++ linux,default-trigger = "default-on";
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++ };
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++ };
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++
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++ vdd_0v9: regulator-0v9-vdd {
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++ compatible = "regulator-fixed";
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++ regulator-name = "vdd_0v9";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <900000>;
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++ regulator-max-microvolt = <900000>;
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++ vin-supply = <&vcc5v0_sys>;
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++ };
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++
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++ vcc_ddr: regulator-1v1-vcc-ddr {
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++ compatible = "regulator-fixed";
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++ regulator-name = "vcc_ddr";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <1100000>;
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++ regulator-max-microvolt = <1100000>;
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++ vin-supply = <&vcc5v0_sys>;
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++ };
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++
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++ vcc_1v8: regulator-1v8-vcc {
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++ compatible = "regulator-fixed";
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++ regulator-name = "vcc_1v8";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <1800000>;
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++ regulator-max-microvolt = <1800000>;
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++ vin-supply = <&vcc_3v3>;
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++ };
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++
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++ vcc_3v3: regulator-3v3-vcc {
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++ compatible = "regulator-fixed";
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++ regulator-name = "vcc_3v3";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <3300000>;
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++ regulator-max-microvolt = <3300000>;
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++ vin-supply = <&vcc5v0_sys>;
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++ };
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++
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++ vcc3v3_sd: regulator-3v3-vcc-sd {
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++ compatible = "regulator-fixed";
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++ gpios = <&gpio4 RK_PA1 GPIO_ACTIVE_LOW>;
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&sdmmc_pwren_l>;
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++ regulator-name = "vcc3v3_sd";
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++ regulator-min-microvolt = <3300000>;
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++ regulator-max-microvolt = <3300000>;
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++ vin-supply = <&vcc_3v3>;
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++ };
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++
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++ vcc5v0_sys: regulator-5v0-vcc-sys {
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++ compatible = "regulator-fixed";
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++ regulator-name = "vcc5v0_sys";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <5000000>;
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++ regulator-max-microvolt = <5000000>;
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++ };
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++
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++ vccio_sd: regulator-vccio-sd {
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++ compatible = "regulator-gpio";
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++ gpios = <&gpio4 RK_PB6 GPIO_ACTIVE_HIGH>;
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&sdmmc_vol_ctrl_h>;
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++ regulator-name = "vccio_sd";
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++ regulator-min-microvolt = <1800000>;
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++ regulator-max-microvolt = <3300000>;
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++ states = <1800000 0x0>, <3300000 0x1>;
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++ vin-supply = <&vcc5v0_sys>;
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++ };
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++
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++ vdd_arm: regulator-vdd-arm {
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++ compatible = "pwm-regulator";
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++ pwms = <&pwm1 0 5000 PWM_POLARITY_INVERTED>;
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++ pwm-supply = <&vcc5v0_sys>;
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++ regulator-name = "vdd_arm";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <746000>;
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++ regulator-max-microvolt = <1201000>;
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++ regulator-settling-time-up-us = <250>;
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++ };
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++
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++ vdd_logic: regulator-vdd-logic {
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++ compatible = "pwm-regulator";
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++ pwms = <&pwm2 0 5000 PWM_POLARITY_INVERTED>;
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++ pwm-supply = <&vcc5v0_sys>;
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++ regulator-name = "vdd_logic";
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++ regulator-always-on;
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++ regulator-boot-on;
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++ regulator-min-microvolt = <705000>;
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++ regulator-max-microvolt = <1006000>;
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++ regulator-settling-time-up-us = <250>;
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++ };
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++};
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++
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++&cpu0 {
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++ cpu-supply = <&vdd_arm>;
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++};
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++
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++&cpu1 {
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++ cpu-supply = <&vdd_arm>;
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++};
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++
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++&cpu2 {
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++ cpu-supply = <&vdd_arm>;
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++};
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++
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++&cpu3 {
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++ cpu-supply = <&vdd_arm>;
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++};
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++
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++&gmac1 {
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++ clock_in_out = "output";
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++ phy-handle = <&rgmii_phy>;
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++ phy-mode = "rgmii-id";
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++ phy-supply = <&vcc_3v3>;
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&rgmii_miim>,
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++ <&rgmii_tx_bus2>,
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++ <&rgmii_rx_bus2>,
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++ <&rgmii_rgmii_clk>,
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++ <&rgmii_rgmii_bus>;
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++ status = "okay";
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++};
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++
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++&mdio1 {
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++ rgmii_phy: ethernet-phy@1 {
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++ compatible = "ethernet-phy-ieee802.3-c22";
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++ reg = <0x1>;
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&gmac1_rstn_l>;
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++ reset-assert-us = <20000>;
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++ reset-deassert-us = <100000>;
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++ reset-gpios = <&gpio4 RK_PC2 GPIO_ACTIVE_LOW>;
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++ };
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++};
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++
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++&pinctrl {
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++ gmac {
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++ gmac1_rstn_l: gmac1-rstn-l {
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++ rockchip,pins = <4 RK_PC2 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++ };
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++
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++ leds {
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++ lan_led: lan-led {
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++ rockchip,pins = <4 RK_PC1 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++
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++ wan_led: wan-led {
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++ rockchip,pins = <4 RK_PC0 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++
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++ work_led: work-led {
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++ rockchip,pins = <4 RK_PB7 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++ };
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++
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++ sdmmc {
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++ sdmmc_pwren_l: sdmmc-pwren-l {
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++ rockchip,pins = <4 RK_PA1 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++
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++ sdmmc_vol_ctrl_h: sdmmc-vol-ctrl-h {
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++ rockchip,pins = <4 RK_PB6 RK_FUNC_GPIO &pcfg_pull_none>;
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++ };
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++ };
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++};
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++
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++&pwm1 {
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&pwm1m0_pins>;
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++ status = "okay";
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++};
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++
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++&pwm2 {
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&pwm2m0_pins>;
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++ status = "okay";
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++};
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++
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++&saradc {
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++ vref-supply = <&vcc_1v8>;
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++ status = "okay";
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++};
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++
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++&sdhci {
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++ bus-width = <8>;
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++ cap-mmc-highspeed;
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++ mmc-hs200-1_8v;
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++ non-removable;
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++ vmmc-supply = <&vcc_3v3>;
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++ vqmmc-supply = <&vcc_1v8>;
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++ status = "okay";
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++};
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++
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++&sdmmc {
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++ bus-width = <4>;
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++ cap-sd-highspeed;
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++ disable-wp;
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++ sd-uhs-sdr104;
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++ vmmc-supply = <&vcc3v3_sd>;
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++ vqmmc-supply = <&vccio_sd>;
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++ status = "okay";
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++};
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++
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++&uart0 {
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++ pinctrl-names = "default";
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++ pinctrl-0 = <&uart0m0_xfer>;
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++ status = "okay";
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++};
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Chukun Pan