Hi!

On Mon, Nov 02, 2020 at 06:01:57PM +0800, Yu-Tung Chang wrote:
> The NanoPi R1 is a complete open source board developed
> by FriendlyElec for makers, hobbyists, fans and etc.
> 
> NanoPi R1 key features
> - Allwinner H3, Quad-core Cortex-A7@1.2GHz
> - 512MB/1GB DDR3 RAM
> - 8GB eMMC
> - microSD slot
> - 10/100/1000M Ethernet x 1
> - 10/100 Ethernet x 1
> - Wifi 802.11b/g/n
> - Bluetooth 4.0
> - Serial Debug Port
> - 5V 2A DC power-supply
> 
> Signed-off-by: Yu-Tung Chang <mtwget@gmail.com>
> ---
>  .../devicetree/bindings/arm/sunxi.yaml        |   5 +
>  arch/arm/boot/dts/Makefile                    |   1 +
>  arch/arm/boot/dts/sun8i-h3-nanopi-r1.dts      | 169 ++++++++++++++++++
>  3 files changed, 175 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sun8i-h3-nanopi-r1.dts
> 
> diff --git a/Documentation/devicetree/bindings/arm/sunxi.yaml b/Documentation/devicetree/bindings/arm/sunxi.yaml
> index 0f23133672a3..54a1aaee7e22 100644
> --- a/Documentation/devicetree/bindings/arm/sunxi.yaml
> +++ b/Documentation/devicetree/bindings/arm/sunxi.yaml
> @@ -251,6 +251,11 @@ properties:
>            - const: friendlyarm,nanopi-neo-plus2
>            - const: allwinner,sun50i-h5
>  
> +      - description: FriendlyARM NanoPi R1
> +        items:
> +          - const: friendlyarm,nanopi-r1
> +          - const: allwinner,sun8i-h3
> +
>        - description: FriendlyARM ZeroPi
>          items:
>            - const: friendlyarm,zeropi
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 4f0adfead547..aabaf67f86ed 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -1192,6 +1192,7 @@ dtb-$(CONFIG_MACH_SUN8I) += \
>  	sun8i-h3-nanopi-m1-plus.dtb \
>  	sun8i-h3-nanopi-neo.dtb \
>  	sun8i-h3-nanopi-neo-air.dtb \
> +	sun8i-h3-nanopi-r1.dtb \
>  	sun8i-h3-orangepi-2.dtb \
>  	sun8i-h3-orangepi-lite.dtb \
>  	sun8i-h3-orangepi-one.dtb \
> diff --git a/arch/arm/boot/dts/sun8i-h3-nanopi-r1.dts b/arch/arm/boot/dts/sun8i-h3-nanopi-r1.dts
> new file mode 100644
> index 000000000000..204a39f93f4e
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-h3-nanopi-r1.dts
> @@ -0,0 +1,169 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2019 Igor Pecovnik <igor@armbian.com>
> + * Copyright (C) 2020 Jayantajit Gogoi <jayanta.gogoi525@gmail.com>
> + * Copyright (C) 2020 Yu-Tung Chang <mtwget@gmail.com>
> +*/
> +
> +#include "sun8i-h3-nanopi.dtsi"
> +#include <dt-bindings/leds/common.h>
> +
> +/ {
> +	model = "FriendlyARM NanoPi R1";
> +	compatible = "friendlyarm,nanopi-r1", "allwinner,sun8i-h3";
> +
> +	aliases {
> +		serial1 = &uart1;
> +		ethernet0 = &emac;
> +		ethernet1 = &wifi;
> +	};
> +
> +	reg_gmac_3v3: gmac-3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "gmac-3v3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		startup-delay-us = <100000>;
> +		enable-active-high;
> +		gpio = <&pio 3 6 GPIO_ACTIVE_HIGH>; /* PD6 */
> +	};
> +
> +	reg_vdd_cpux: gpio-regulator {
> +		compatible = "regulator-gpio";
> +		regulator-name = "vdd-cpux";
> +		regulator-type = "voltage";
> +		regulator-boot-on;
> +		regulator-always-on;
> +		regulator-min-microvolt = <1100000>;
> +		regulator-max-microvolt = <1300000>;
> +		regulator-ramp-delay = <50>;
> +		gpios = <&r_pio 0 6 GPIO_ACTIVE_HIGH>; /* PL6 */
> +		gpios-states = <0x1>;
> +		states = <1100000 0x0
> +			  1300000 0x1>;
> +	};
> +
> +	wifi_pwrseq: wifi_pwrseq {
> +		compatible = "mmc-pwrseq-simple";
> +		reset-gpios = <&r_pio 0 7 GPIO_ACTIVE_LOW>; /* PL7 */
> +		clocks = <&rtc 1>;
> +		clock-names = "ext_clock";
> +	};
> +
> +	leds {
> +		led-2 {
> +			function = LED_FUNCTION_WAN;
> +			color = <LED_COLOR_ID_GREEN>;
> +			gpios = <&pio 6 11 GPIO_ACTIVE_HIGH>; /* PG11 */
> +		};
> +
> +		led-3 {
> +			function = LED_FUNCTION_LAN;
> +			color = <LED_COLOR_ID_GREEN>;
> +			gpios = <&pio 0 9 GPIO_ACTIVE_HIGH>; /* PA9 */
> +		};
> +	};
> +};
> +
> +&cpu0 {
> +	cpu-supply = <&reg_vdd_cpux>;
> +};
> +
> +&ehci1 {
> +	status = "okay";
> +};
> +
> +&ehci2 {
> +	status = "okay";
> +};
> +
> +&emac {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&emac_rgmii_pins>;
> +	phy-supply = <&reg_gmac_3v3>;
> +	phy-handle = <&ext_rgmii_phy>;
> +	phy-mode = "rgmii-id";
> +	status = "okay";
> +};
> +
> +&external_mdio {
> +	ext_rgmii_phy: ethernet-phy@7 {
> +		compatible = "ethernet-phy-ieee802.3-c22";
> +		reg = <7>;
> +	};
> +};
> +
> +&mmc1 {
> +	vmmc-supply = <&reg_vcc3v3>;
> +	vqmmc-supply = <&reg_vcc3v3>;
> +	mmc-pwrseq = <&wifi_pwrseq>;
> +	bus-width = <4>;
> +	non-removable;
> +	status = "okay";
> +
> +	wifi: wifi@1 {
> +		reg = <1>;
> +		compatible = "brcm,bcm4329-fmac";
> +		interrupt-parent = <&pio>;
> +		interrupts = <6 10 IRQ_TYPE_LEVEL_LOW>; /* PG10 / EINT10 */
> +		interrupt-names = "host-wake";
> +	};
> +};
> +
> +&mmc2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc2_8bit_pins>;
> +	vmmc-supply = <&reg_vcc3v3>;
> +	vqmmc-supply = <&reg_vcc3v3>;
> +	bus-width = <8>;
> +	non-removable;
> +	status = "okay";
> +};
> +
> +&ohci1 {
> +	status = "okay";
> +};
> +
> +&ohci2 {
> +	status = "okay";
> +};
> +
> +&reg_usb0_vbus {
> +	gpio = <&r_pio 0 2 GPIO_ACTIVE_HIGH>; /* PL2 */
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&uart1_pins>;

This should be already set in the DTSI

> +	status = "okay";
> +};

What is this UART used for?

Thanks!
Maxime