linux-kernel - Re: [PATCH] riscv: dts: HiFive Unleashed: add default chosen/stdout-path

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Message-ID: <329f84a635caa92f954c8d614975f03e22158c4a.camel@wdc.com>
Date:   Wed, 9 Oct 2019 22:57:09 +0000
From:   Atish Patra <Atish.Patra@....com>
To:     "paul.walmsley@...ive.com" <paul.walmsley@...ive.com>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>
CC:     "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] riscv: dts: HiFive Unleashed: add default
 chosen/stdout-path

On Wed, 2019-10-09 at 12:42 -0700, Paul Walmsley wrote:
> Add a default "stdout-path" to the kernel DTS file, as is present in
> many 
> of the board DTS files elsewhere in the kernel tree. With this line 
> present, earlyconsole can be enabled by simply passing "earlycon" on
> the 
> kernel command line.  No specific device details are necessary, since
> the 
> kernel will use the stdout-path as the default.
> 
> Signed-off-by: Paul Walmsley <paul.walmsley@...ive.com>
> ---
> Tested on a HiFive Unleashed using BBL.
> 
>  arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> index 104d334511cd..88cfcb96bf23 100644
> --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> @@ -13,6 +13,7 @@
>  	compatible = "sifive,hifive-unleashed-a00", "sifive,fu540-
> c000";
>  
>  	chosen {
> +		stdout-path = "serial0";
>  	};
>  
>  	cpus {

Tested on a HiFive Unleashed using OpenSBI + U-Boot + Linux boot flow.

Once this patch is merged, we can remove stdout-path fix in OpenSBI for
unleashed platform as well.

Reviewed-by: Atish Patra <atish.patra@....com>


-- 
Regards,
Atish