From mboxrd@z Thu Jan  1 00:00:00 1970
From: swarren@wwwdotorg.org (Stephen Warren)
Date: Mon, 18 Jun 2012 11:26:28 -0600
Subject: [PATCH] sound/gpio: of_get_named_gpio() return -EPROBE_DEFER
 if GPIO deferred
In-Reply-To: <1340040176-16553-1-git-send-email-stigge@antcom.de>
References: <1340040176-16553-1-git-send-email-stigge@antcom.de>
Message-ID: <4FDF64C4.8060308@wwwdotorg.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On 06/18/2012 11:22 AM, Roland Stigge 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.

Acked-by: Stephen Warren <swarren@wwwdotorg.org>

(That applies to the two separate sound patches too, if needed!)