Re: [PATCH 1/4] pinctrl: baytrail: Relax GPIO request rules

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Mon, Feb 23, 2015 at 1:53 PM, Mika Westerberg
<mika.westerberg@xxxxxxxxxxxxxxx> wrote:

> Zotac ZBOX PI320, a Baytrail based mini-PC, has power button connected to a
> GPIO pin and it is exposed to the operating system as Windows 8 button
> array. This is implemented in Linux as a driver using gpio_keys.
>
> However, BIOS on this particula machine forgot to mux the pin to be a GPIO
> instead of native function, which results following message to be seen on
> the console:
>
>  byt_gpio INT33FC:02: pin 16 cannot be used as GPIO.
>
> This causes power button to not work as the driver was not able to request
> the GPIO it needs.
>
> So instead of completely preventing this we allow turning the pin as GPIO
> but issue warning that something might be wrong.
>
> Reported-by: Benjamin Adler <benadler@xxxxxxx>
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>

Patch applied for fixes.

Yours,
Linus Walleij
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