Messages in this thread | | | Subject | Re: [PATCH] pinctrl: lochnagar: select GPIOLIB | From | Richard Fitzgerald <> | Date | Tue, 7 Jan 2020 11:58:22 +0000 |
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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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