linux-kernel - Re: [PATCH v3 7/7] riscv: dts: starfive: Add StarFive JH7110 VisionFive 2 board device tree

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Message-ID: <Y72nbfJxYdO2AojI@spud>
Date:   Tue, 10 Jan 2023 17:59:09 +0000
From:   Conor Dooley <conor@...nel.org>
To:     Hal Feng <hal.feng@...rfivetech.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        Palmer Dabbelt <palmer@...belt.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Ben Dooks <ben.dooks@...ive.com>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Emil Renner Berthing <emil.renner.berthing@...onical.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 7/7] riscv: dts: starfive: Add StarFive JH7110
 VisionFive 2 board device tree

On Tue, Dec 20, 2022 at 09:12:47AM +0800, Hal Feng wrote:

> +	aliases {
> +		serial0 = &uart0;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};

So I think this is wrong, and the stdout-path should be uart3 instead.
Per the QSG [0], GPIO5/6 are the suggested UART Tx/Rx to use.
This appears to map to uart3 rather than uart0.
FWIW, uart3 is also the stdout-path for the v1, see:
arch/riscv/boot/dts/starfive/jh7100-common.dtsi

At least, that change is what I needed to do in order to use the
JH7110_VisionFive2_upstream branch, AFAICT matches what you've got in
this series.

Thanks,
Conor.

0 - https://doc-en.rvspace.org/VisionFive2/PDF/VisionFive2_QSG.pdf

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