On Tue, Jan 7, 2020 at 12:58 PM Richard Fitzgerald
[off-list ref] wrote:

On 07/01/2020 10:39, Arnd Bergmann wrote:

quoted

On Tue, Jan 7, 2020 at 10:45 AM Linus Walleij [off-list ref] wrote:

quoted

On Wed, Dec 18, 2019 at 5:37 PM Arnd Bergmann [off-list ref] wrote:

quoted

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?

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

I understand that this is the case in theory, but what I was wondering about
is whether there are any such users, or at least any that also want to
save a few kilobytes of kernel size for gpiolib.

          Arnd