linux-kernel - Re: [PATCH] pinctrl: samsung: modularize samsung pinctrl driver

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Date:   Wed, 27 Nov 2019 08:58:18 +0100
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Hyunki Koo <hyunki00.koo@...sung.com>
Cc:     Krzysztof Kozlowski <krzk@...nel.org>,
        Tomasz Figa <tomasz.figa@...il.com>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: samsung: modularize samsung pinctrl driver

On Tue, Nov 26, 2019 at 2:14 AM Hyunki Koo <hyunki00.koo@...sung.com> wrote:

> I would like to apply GKI on the pinctrl driver
> So I would like to cut off dependency from ARCH_EXYNOS.

If the pins need to be configured for the system to boot that needs
to be in the big kernel image anyway. And then it should be bool.

Example: to mount the root filesystem on external flash pin
configuration needs to happen.

There is a slight paradigm shift sometimes: in distribution
kernels it might be required that necessary modules are
included in an initramfs attached to the kernel. I do not know
if we want to encourage that type of configuration for embedded
ARM.

Yours,
Linus Walleij