Re: question: pin mux & gpio

[David Cohen <david.a.cohen@linux.intel.com>]

Hi Linus,

On 10/29/2013 10:03 AM, Linus Walleij wrote:
> On Wed, Oct 23, 2013 at 6:28 PM, David Cohen
> <david.a.cohen@linux.intel.com> wrote:
>
>> I've got a question WRT pin muxing.
>> gpio-intel-mid registers are responsible to set alternative functions
>> to some pins. Despite pin mux is not directly related to gpio in
>> general, in this case it is.
>
> I know this use case.
>
>> Is there any other gpio driver doing this same task? Or maybe
>> suggestion about how to handle it?
>
> First read Documentation/pinctrl.txt :-)
>
> Move the driver to drivers/pinctrl/pinctrl-intel-mid.c in the next
> merge window, and add pin control interfaces in the style of the
> other combined pin control+GPIO drivers there. Keeping one state
> struct but exposing interfaces to both subsystems is perfectly
> acceptable. Use GPIO ranges to cross-reference GPIO lines
> to pins.

Thanks. I'll work on that change.

Br, David Cohen