linux-kernel - Re: [PATCH] ARM: dts: vf-colibri: define stdout-path property

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Date:	Wed, 15 Jul 2015 16:05:50 +0200
From:	Stefan Agner <stefan@...er.ch>
To:	Shawn Guo <shawnguo@...nel.org>
Cc:	shawn.guo@...aro.org, kernel@...gutronix.de,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: vf-colibri: define stdout-path property

On 2015-07-13 17:10, Shawn Guo wrote:
> On Fri, Jul 03, 2015 at 10:06:39AM +0200, Stefan Agner wrote:
>> Define Vybrid's UART0, connected to the Colibri pinout UART_A, as
>> standard output.
>>
>> Signed-off-by: Stefan Agner <stefan@...er.ch>
>> ---
>>  arch/arm/boot/dts/vf-colibri-eval-v3.dtsi | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> index 2cbe663..cb199ae 100644
>> --- a/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> +++ b/arch/arm/boot/dts/vf-colibri-eval-v3.dtsi
>> @@ -10,6 +10,7 @@
>>  / {
>>  	chosen {
>>  		bootargs = "console=ttyLP0,115200";
>> +		stdout-path = "serial0:115200n8";
> 
> With this change, can bootargs just be dropped?

I guess it would break a (fairly old) kernel which does not support
stdout-path yet?

However, the newer Vybrid DT's anyway do not work on old kernels due to
the interrupt hierarchy changes...

Will send a v2 without default bootargs.

--
Stefan
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