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SubjectRe: [PATCH] pinctrl: lochnagar: select GPIOLIB
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On 07/01/2020 10:39, Arnd Bergmann wrote:
> On Tue, Jan 7, 2020 at 10:45 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>> On Wed, Dec 18, 2019 at 5:37 PM Arnd Bergmann <arnd@arndb.de> wrote:
>>> I wonder if GPIOLIB should just become mandatory when enabling the pinctrl
>>> subsystem, or if there are still good reasons for leaving it disabled
>>> on any machine that uses CONFIG_PINCTRL.
>>
>> Hm that is a tricky question, they almost always come in pair but are
>> technically speaking separate subsystems.
>
> I think there are a number of use cases for GPIOLIB drivers without PINCTRL, but
> are there any examples of the reverse?
>
> Arnd
>

You could have muxable pins that aren't gpios. For example muxing
between i2c/spi signals. So a pinctrl driver doesn't imply gpio.

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