linux-kernel - Re: [PATCH 09/11] MIPS: mobileye: Add EPM5 device tree

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Date:   Mon, 09 Oct 2023 16:51:06 +0200
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Arnd Bergmann <arnd@...db.de>, Paul Burton <paulburton@...nel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Vladimir Kondratiev <vladimir.kondratiev@...el.com>,
        Tawfik Bayouk <tawfik.bayouk@...ileye.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Théo Lebrun <theo.lebrun@...tlin.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH 09/11] MIPS: mobileye: Add EPM5 device tree

"Arnd Bergmann" <arnd@...db.de> writes:

> On Wed, Oct 4, 2023, at 18:10, Gregory CLEMENT wrote:
>> +
>> +	chosen {
>> +		bootargs = "cca=5 earlycon console=ttyAMA2 ddr32_alias=0x40000000";
>> +		stdout-path = "serial2:115200n8";
>> +	};
>> +
>
> The bootargs should not be needed here, at least most of them:
>
> - no need to set both console= and the stdout-path if you have
>   earlycon support

OK I keep stdout-path.

>
> - ddr32_alias=0x40000000 sounds like something that should be
>   part of the dtb elsewhere and not require a command line argument.
>   I assume this is needed to even build?

I will answer on the other email but in short I agree.
>
> - For cca=, it looks like this is intended to be autodetected from
>   the c0_config register. Does that not work for you for some reason?

Indeed I checked and it it nost needed anymore, it is already set in
cps_smp_setup. I remove it.

Thanks,

Gregory

>
>      Arnd

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com