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

[Linus Walleij]

On Tue, Aug 6, 2019 at 3:04 PM Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
> On Sat, Aug 3, 2019 at 3:34 PM Ramon Fried <rfried.dev@xxxxxxxxx> 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 <rfried.dev@xxxxxxxxx>
> > Signed-off-by: Ramon Fried <rfried.dev@xxxxxxxxx>
> > ---
> > Sending Stefan's RFC as patch, as I tested it and it seems to work,
> > additionally, an accompanying fix was made by me to gpiolibd to fix a
> > display error of the actual result:
> > https://patchwork.ozlabs.org/patch/1139923/
>
> This is mostly fine, some style nits so I fixed it up when
> applying.

Ooops no. It needs a deeper rework in accordance to my comments
last time it was posted. Please read this reply to Stefan's patch
and address the comments:

https://lore.kernel.org/linux-gpio/CACRpkdb5DjAMRYkT+b0U6HVk7E6ccLT79-LB=QGQWWtE17aPUg@xxxxxxxxxxxxxx/

Yours,
Linus Walleij