linux-kernel - Re: [PATCH] arm64: defconfig: Modify number of usable 8250 uart ports

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Message-ID: <ac2f4ba0-e48a-480e-98da-500041f564ac@linaro.org>
Date: Tue, 28 May 2024 08:34:18 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Bhavya Kapoor <b-kapoor@...com>, Arnd Bergmann <arnd@...db.de>,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: Udit Kumar <u-kumar1@...com>,
 Nícolas F. R. A. Prado <nfraprado@...labora.com>,
 Marek Szyprowski <m.szyprowski@...sung.com>,
 Biju Das <biju.das.jz@...renesas.com>,
 Neil Armstrong <neil.armstrong@...aro.org>, Shawn Guo <shawnguo@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>,
 Geert Uytterhoeven <geert+renesas@...der.be>,
 Bjorn Andersson <quic_bjorande@...cinc.com>, Will Deacon <will@...nel.org>,
 Catalin Marinas <catalin.marinas@....com>
Subject: Re: [PATCH] arm64: defconfig: Modify number of usable 8250 uart ports

On 28/05/2024 08:26, Bhavya Kapoor wrote:
> Hi Arnd, our most boards have 6 uarts that can be used in the runtime
> 
> but overall our SoC has 12 uarts. And some of our customers have this
> 
> requirements that on their custom boards they use more than 8 uarts on their
> 
> boards. Thus, we need to enable this to 12 uarts.

defconfig is for boards in tree, for developers, not for customers.
Argument that some out-of-tree user has more uarts does not mean much
for defconfig. If they have some weird hardware, shall we enable it? Or
if they want DEBUG_KOBJECT? Or anything else?

You mistake kernel development defconfig with a distro or product config.

Best regards,
Krzysztof