Date: Sun, 11 Feb 2024 23:39:26 +0000
From: Andre Przywara <andre.przywara@....com>
To: Jisheng Zhang <jszhang@...nel.org>
Cc: Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
 Samuel Holland <samuel@...lland.org>, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/2] arm64: dts: allwinner: h616: Add Sipeed Longan
 SoM 3H and Pi 3H board support

On Sun, 11 Feb 2024 16:17:39 +0800
Jisheng Zhang <jszhang@...nel.org> wrote:

Hi Jisheng,

thanks for the changes, and for spotting the 5V/3.3V issue yourself,
which I missed. This looks good to me now.

> The Sipeed Longan SoM 3H is a system on module based on the Allwinner
> H618 SoC. The SoM features:
> 
> - Four ARM Cortex-A53 cores, Mali-G31 MP2 GPU
> - 2/4 GiB LPDDR4 DRAM SoMs
> - AXP313a PMIC
> - eMMC
> 
> The Sipeed Longan PI 3H is a development board based on the above SoM.
> The board features:
> - Longan SoM 3H
> - Raspberry-Pi-1 compatible GPIO header
> - 2 USB 2.0 host port
> - 1 USB 2.0 type C port (power supply + OTG)
> - MicroSD slot
> - 1Gbps Ethernet port (via RTL8211 PHY)
> - HDMI port
> - WiFi/BT chip
> 
> Add the devicetree file describing the currently supported features,
> namely PMIC, LEDs, UART, SD card, eMMC, USB and Ethernet.
> 
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>

Reviewed-by: Andre Przywara <andre.przywara@....com>

Cheers,
Andre

> ---
>  arch/arm64/boot/dts/allwinner/Makefile        |   1 +
>  .../sun50i-h618-longan-module-3h.dtsi         |  75 +++++++++
>  .../dts/allwinner/sun50i-h618-longanpi-3h.dts | 144 ++++++++++++++++++
>  3 files changed, 220 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h618-longan-module-3h.dtsi
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-h618-longanpi-3h.dts
> 
> diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
> index 91d505b385de..4b9173a16efe 100644
> --- a/arch/arm64/boot/dts/allwinner/Makefile
> +++ b/arch/arm64/boot/dts/allwinner/Makefile
> @@ -42,5 +42,6 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-bigtreetech-cb1-manta.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-bigtreetech-pi.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-orangepi-zero2.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h616-x96-mate.dtb
> +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h618-longanpi-3h.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h618-orangepi-zero3.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h618-transpeed-8k618-t.dtb
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h618-longan-module-3h.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h618-longan-module-3h.dtsi
> new file mode 100644
> index 000000000000..8c1263a3939e
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h618-longan-module-3h.dtsi
> @@ -0,0 +1,75 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) Jisheng Zhang <jszhang@...nel.org>
> + */
> +
> +#include "sun50i-h616.dtsi"
> +
> +&mmc2 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&mmc2_pins>;
> +	vmmc-supply = <&reg_dldo1>;
> +	vqmmc-supply = <&reg_aldo1>;
> +	bus-width = <8>;
> +	non-removable;
> +	cap-mmc-hw-reset;
> +	mmc-ddr-1_8v;
> +	mmc-hs200-1_8v;
> +	status = "okay";
> +};
> +
> +&r_i2c {
> +	status = "okay";
> +
> +	axp313: pmic@36 {
> +		compatible = "x-powers,axp313a";
> +		reg = <0x36>;
> +		#interrupt-cells = <1>;
> +		interrupt-controller;
> +
> +		regulators {
> +			reg_aldo1: aldo1 {
> +				regulator-always-on;
> +				regulator-min-microvolt = <1800000>;
> +				regulator-max-microvolt = <1800000>;
> +				regulator-name = "vcc-1v8-pll";
> +			};
> +
> +			reg_dldo1: dldo1 {
> +				regulator-always-on;
> +				regulator-min-microvolt = <3300000>;
> +				regulator-max-microvolt = <3300000>;
> +				regulator-name = "vcc-3v3-io";
> +			};
> +
> +			reg_dcdc1: dcdc1 {
> +				regulator-always-on;
> +				regulator-min-microvolt = <810000>;
> +				regulator-max-microvolt = <990000>;
> +				regulator-name = "vdd-gpu-sys";
> +			};
> +
> +			reg_dcdc2: dcdc2 {
> +				regulator-always-on;
> +				regulator-min-microvolt = <810000>;
> +				regulator-max-microvolt = <1100000>;
> +				regulator-name = "vdd-cpu";
> +			};
> +
> +			reg_dcdc3: dcdc3 {
> +				regulator-always-on;
> +				regulator-min-microvolt = <1100000>;
> +				regulator-max-microvolt = <1100000>;
> +				regulator-name = "vdd-dram";
> +			};
> +		};
> +	};
> +};
> +
> +&pio {
> +	vcc-pc-supply = <&reg_dldo1>;
> +	vcc-pf-supply = <&reg_dldo1>;
> +	vcc-pg-supply = <&reg_aldo1>;
> +	vcc-ph-supply = <&reg_dldo1>;
> +	vcc-pi-supply = <&reg_dldo1>;
> +};
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h618-longanpi-3h.dts b/arch/arm64/boot/dts/allwinner/sun50i-h618-longanpi-3h.dts
> new file mode 100644
> index 000000000000..18b29c6b867f
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h618-longanpi-3h.dts
> @@ -0,0 +1,144 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) Jisheng Zhang <jszhang@...nel.org>
> + */
> +
> +/dts-v1/;
> +
> +#include "sun50i-h618-longan-module-3h.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/leds/common.h>
> +
> +/ {
> +	model = "Sipeed Longan Pi 3H";
> +	compatible = "sipeed,longan-pi-3h", "sipeed,longan-module-3h", "allwinner,sun50i-h618";
> +
> +	aliases {
> +		ethernet0 = &emac0;
> +		serial0 = &uart0;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +
> +		led-0 {
> +			color = <LED_COLOR_ID_ORANGE>;
> +			function = LED_FUNCTION_INDICATOR;
> +			function-enumerator = <0>;
> +			gpios = <&pio 6 2 GPIO_ACTIVE_LOW>; /* PG2 */
> +		};
> +
> +		led-1 {
> +			color = <LED_COLOR_ID_ORANGE>;
> +			function = LED_FUNCTION_INDICATOR;
> +			function-enumerator = <1>;
> +			gpios = <&pio 6 4 GPIO_ACTIVE_LOW>; /* PG4 */
> +		};
> +	};
> +
> +	reg_vcc5v: regulator-vcc5v {
> +		/* board wide 5V supply directly from the USB-C socket */
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc-5v";
> +		regulator-min-microvolt = <5000000>;
> +		regulator-max-microvolt = <5000000>;
> +		regulator-always-on;
> +	};
> +
> +	reg_vcc3v3: regulator-vcc3v3 {
> +		compatible = "regulator-fixed";
> +		regulator-name = "vcc-3v3";
> +		regulator-min-microvolt = <3300000>;
> +		regulator-max-microvolt = <3300000>;
> +		regulator-always-on;
> +		vin-supply = <&reg_vcc5v>;
> +	};
> +};
> +
> +&axp313 {
> +	vin1-supply = <&reg_vcc5v>;
> +	vin2-supply = <&reg_vcc5v>;
> +	vin3-supply = <&reg_vcc5v>;
> +};
> +
> +&ehci1 {
> +	status = "okay";
> +};
> +
> +&ohci1 {
> +	status = "okay";
> +};
> +
> +&ehci2 {
> +	status = "okay";
> +};
> +
> +&ohci2 {
> +	status = "okay";
> +};
> +
> +/* WiFi & BT combo module is connected to this Host */
> +&ehci3 {
> +	status = "okay";
> +};
> +
> +&ohci3 {
> +	status = "okay";
> +};
> +
> +&emac0 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&ext_rgmii_pins>;
> +	phy-mode = "rgmii";
> +	phy-handle = <&ext_rgmii_phy>;
> +	allwinner,rx-delay-ps = <3100>;
> +	allwinner,tx-delay-ps = <700>;
> +	phy-supply = <&reg_vcc3v3>;
> +	status = "okay";
> +};
> +
> +&mdio0 {
> +	ext_rgmii_phy: ethernet-phy@1 {
> +		compatible = "ethernet-phy-ieee802.3-c22";
> +		reg = <1>;
> +	};
> +};
> +
> +&mmc0 {
> +	bus-width = <4>;
> +	cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>;	/* PF6 */
> +	vmmc-supply = <&reg_vcc3v3>;
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	status = "okay";
> +};
> +
> +&usbotg {
> +	/*
> +	 * PHY0 pins are connected to a USB-C socket, but a role switch
> +	 * is not implemented: both CC pins are pulled to GND.
> +	 * The VBUS pins power the device, so a fixed peripheral mode
> +	 * is the best choice.
> +	 * The board can be powered via GPIOs, in this case port0 *can*
> +	 * act as a host (with a cable/adapter ignoring CC), as VBUS is
> +	 * then provided by the GPIOs. Any user of this setup would
> +	 * need to adjust the DT accordingly: dr_mode set to "host",
> +	 * enabling OHCI0 and EHCI0.
> +	 */
> +	dr_mode = "peripheral";
> +	status = "okay";
> +};
> +
> +&usbphy {
> +	usb1_vbus-supply = <&reg_vcc5v>;
> +	usb2_vbus-supply = <&reg_vcc5v>;
> +	status = "okay";
> +};

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