linux-kernel - Re: [PATCH v2 6/6] riscv: dts: sophgo: Add LicheeRV Nano board device tree

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Date: Thu, 20 Jun 2024 09:00:04 +0800
From: Inochi Amaoto <inochiama@...look.com>
To: Thomas Bonnefille <thomas.bonnefille@...tlin.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Chen Wang <unicorn_wang@...look.com>, Inochi Amaoto <inochiama@...look.com>, 
	Chao Wei <chao.wei@...hgo.com>
Cc: Albert Ou <aou@...s.berkeley.edu>, Palmer Dabbelt <palmer@...belt.com>, 
	Samuel Holland <samuel.holland@...ive.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Daniel Lezcano <daniel.lezcano@...aro.org>, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
	Miquèl Raynal <miquel.raynal@...tlin.com>, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 6/6] riscv: dts: sophgo: Add LicheeRV Nano board
 device tree

On Wed, Jun 12, 2024 at 10:02:36AM GMT, Thomas Bonnefille wrote:
> LicheeRV Nano B [1] is an embedded development platform based on the SOPHGO
> SG2002 chip, the B(ase) version is deprived of Wifi/Bluetooth and Ethernet.
> 
> Add only support for UART and SDHCI.
> 
> Link: https://wiki.sipeed.com/hardware/en/lichee/RV_Nano/1_intro.html [1]
> 
> Signed-off-by: Thomas Bonnefille <thomas.bonnefille@...tlin.com>
> ---
>  arch/riscv/boot/dts/sophgo/Makefile                |  1 +
>  .../boot/dts/sophgo/sg2002-licheerv-nano-b.dts     | 53 ++++++++++++++++++++++
>  2 files changed, 54 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/sophgo/Makefile b/arch/riscv/boot/dts/sophgo/Makefile
> index 57ad82a61ea6..47d4243a8f35 100644
> --- a/arch/riscv/boot/dts/sophgo/Makefile
> +++ b/arch/riscv/boot/dts/sophgo/Makefile
> @@ -1,4 +1,5 @@
>  # SPDX-License-Identifier: GPL-2.0
>  dtb-$(CONFIG_ARCH_SOPHGO) += cv1800b-milkv-duo.dtb
>  dtb-$(CONFIG_ARCH_SOPHGO) += cv1812h-huashan-pi.dtb
> +dtb-$(CONFIG_ARCH_SOPHGO) += sg2002-licheerv-nano-b.dtb
>  dtb-$(CONFIG_ARCH_SOPHGO) += sg2042-milkv-pioneer.dtb
> diff --git a/arch/riscv/boot/dts/sophgo/sg2002-licheerv-nano-b.dts b/arch/riscv/boot/dts/sophgo/sg2002-licheerv-nano-b.dts
> new file mode 100644
> index 000000000000..d011fb15b097
> --- /dev/null
> +++ b/arch/riscv/boot/dts/sophgo/sg2002-licheerv-nano-b.dts
> @@ -0,0 +1,53 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (C) 2024 Thomas Bonnefille <thomas.bonnefille@...tlin.com>
> + */
> +
> +/dts-v1/;
> +
> +#include "sg2002.dtsi"
> +
> +/ {
> +	model = "LicheeRV Nano B";
> +	compatible = "sipeed,licheerv-nano-b", "sipeed,licheerv-nano", "sophgo,sg2002";
> +
> +	aliases {
> +		gpio0 = &gpio0;
> +		gpio1 = &gpio1;
> +		gpio2 = &gpio2;
> +		gpio3 = &gpio3;
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +		serial2 = &uart2;
> +		serial3 = &uart3;
> +		serial4 = &uart4;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +};
> +
> +&osc {
> +	clock-frequency = <25000000>;
> +};
> +
> +&sdhci0 {
> +	status = "okay";
> +	bus-width = <4>;
> +	no-1-8-v;
> +	no-mmc;
> +	no-sdio;
> +};

Please add "disable-wp" property. Otherwise the card will be
probed as read-only.

> +
> +&uart0 {
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	status = "okay";
> +};
> +
> +&i2c0 {
> +	status = "okay";
> +};
> 
> -- 
> 2.45.2
>