[PATCH RESEND] gpio: of_get_named_gpio_flags() return -EPROBE_DEFER if GPIO not yet available

[Linus Walleij]

On Thu, Jun 28, 2012 at 12:32 AM, Roland Stigge <stigge at antcom.de> wrote:

> of_get_named_gpio_flags() and of_get_named_gpio() return -EPROBE_DEFER if the
> respective GPIO is not (yet) available. This is useful if driver's probe()
> functions try to get a GPIO whose controller isn't probed yet. Thus, the driver
> can be probed again later on.
>
> The function still returns -EINVAL on other errors (parse error or node doesn't
> exist). This way, the case of an optional/intentionally missing GPIO is handled
> appropriately.
>
> Signed-off-by: Roland Stigge <stigge at antcom.de>
> Acked-by: Linus Walleij <linus.walleij at linaro.org>

If I understand correctly this relates closely to another patch from Mark Brown
we discussed the other day (sorry for missing this patch, which arrived
earlier, for a while).

Mark/Grant can you look at this patch?

Yours,
Linus Walleij