Re: [PATCH v3] gpiolib: Take MUX usage into account

From: Linus Walleij
Date: Fri Aug 23 2019 - 05:11:50 EST

On Wed, Aug 14, 2019 at 1:01 PM Ramon Fried <ramon.fried@xxxxxxxxxxxxxxx> wrote:

> From: Stefan Wahren <stefan.wahren@xxxxxxxx>
> The user space like gpioinfo only see the GPIO usage but not the
> MUX usage (e.g. I2C or SPI usage) of a pin. As a user we want to know which
> pin is free/safe to use. So take the MUX usage of strict pinmux controllers
> into account to get a more realistic view for ioctl GPIO_GET_LINEINFO_IOCTL.
> Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
> Tested-by: Ramon Fried <>
> Signed-off-by: Ramon Fried <>
> ---
> v3:
> * Remove the debug message and replace with comment in code.

This V3 version applied to the pinctrl tree for testing with
Stefan's ACK.

Thanks for hashing this out.

Linus Walleij