Re: [PATCH v3 1/1] pinctrl: add Intel BayTrail GPIO/pinctrl support

[Westerberg, Mika]

On Thu, Apr 24, 2014 at 06:20:02AM -0500, Timur Tabi wrote:
> Westerberg, Mika wrote:
> >Typically this is done by the boot firmware (BIOS in this case). So the OS
> >doesn't need to deal with that.
> >
> >AFAICT ACPI doesn't know anything about pin muxing.
> 
> In that case, would it be correct to say that a Linux pinctrl driver
> for an ACPI-only platform should not define pinmux function groups,
> because they'll never be used?

No because you can have a GPIO controller on ACPI machine that allows you
to do some sort of pin muxing. What I'm saying is that ACPI itself doesn't
have such knowledge and hence we don't support such things in
gpiolib-acpi.c.
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