[PATCH] sound/gpio: of_get_named_gpio() return -EPROBE_DEFER if GPIO deferred

[Alexandre Pereira da Silva]

On Mon, Jun 18, 2012 at 2:22 PM, 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.
>
> For this change, two sound drivers (tegra_{alc5632,wm8903}) need to be
> adjusted.
>
> Signed-off-by: Roland Stigge <stigge at antcom.de>
Acked-by: Alexandre Pereira da Silva <aletes.xgr at gmail.com>