linux-kernel - Re: [PATCH 1/1] ARM: multi_v7_defconfig: Add MCP23S08 pinctrl support

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Message-ID: <8256bca3-5175-4c0a-a3f0-6a9087efd0df@linaro.org>
Date: Mon, 10 Jun 2024 14:58:44 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Christophe ROULLIER <christophe.roullier@...s.st.com>,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Richard Cochran <richardcochran@...il.com>, Jose Abreu
 <joabreu@...opsys.com>, Liam Girdwood <lgirdwood@...il.com>,
 Mark Brown <broonie@...nel.org>, Marek Vasut <marex@...x.de>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] ARM: multi_v7_defconfig: Add MCP23S08 pinctrl support

On 10/06/2024 14:52, Christophe ROULLIER wrote:
> 
> On 6/10/24 14:27, Krzysztof Kozlowski wrote:
>> On 10/06/2024 10:14, Christophe ROULLIER wrote:
>>>>> @@ -469,6 +469,7 @@ CONFIG_SPI_XILINX=y
>>>>>    CONFIG_SPI_SPIDEV=y
>>>>>    CONFIG_SPMI=y
>>>>>    CONFIG_PINCTRL_AS3722=y
>>>>> +CONFIG_PINCTRL_MCP23S08=y
>>>> This is not an on-SoC pinctrl, so it should be module (=m).
>>> The stmmac is in built-in, if IO-Expander (MCP23S08) is on module, we
>>> have huge of message during kernel boot
>>>
>>> because stmmac driver is deferred several times. (need to wait that
>>> module are ready)
>> Which is normal and not a reason to change defconfig. It it was a
>> problem, you should solve it not in defconfig but in kernel. That's just
>> defconfig, an example, reference or debugging tool if you wish, so
>> fixing issue here is not a fix at all.
> Ok so it will not be possible to boot in NFS mode

Why? You need to fix your initrd, not change defconfig. We all work with
initrds and modules are not a problem at all.

Really, this is jut a defconfig, not a distro config! And even distro
config would make it a module...

Best regards,
Krzysztof