From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH] sound/gpio: of_get_named_gpio() return -EPROBE_DEFER if GPIO deferred Date: Mon, 18 Jun 2012 11:26:28 -0600 Message-ID: <4FDF64C4.8060308@wwwdotorg.org> References: <1340040176-16553-1-git-send-email-stigge@antcom.de> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from avon.wwwdotorg.org ([70.85.31.133]:34928 "EHLO avon.wwwdotorg.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751468Ab2FRR0d (ORCPT ); Mon, 18 Jun 2012 13:26:33 -0400 In-Reply-To: <1340040176-16553-1-git-send-email-stigge@antcom.de> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Roland Stigge Cc: broonie@opensource.wolfsonmicro.com, cjb@laptop.org, grant.likely@secretlab.ca, rob.herring@calxeda.com, rmk+kernel@arm.linux.org.uk, ulf.hansson@stericsson.com, linus.walleij@linaro.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, aletes.xgr@gmail.com, linux-arm-kernel@lists.infradead.org, lrg@ti.com, perex@perex.cz, tiwai@suse.de, alsa-devel@alsa-project.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 (That applies to the two separate sound patches too, if needed!)