From patchwork Fri Jul 17 09:32:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 6814651 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 8D61CC05AC for ; Fri, 17 Jul 2015 09:38:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AEE142062D for ; Fri, 17 Jul 2015 09:38:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id D5F0A20622 for ; Fri, 17 Jul 2015 09:38:31 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZG244-0006Ss-G1; Fri, 17 Jul 2015 09:36:20 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZG21n-0003J3-7V for linux-arm-kernel@lists.infradead.org; Fri, 17 Jul 2015 09:34:02 +0000 Received: from dude.hi.pengutronix.de ([2001:67c:670:100:1d::7]) by metis.ext.pengutronix.de with esmtps (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1ZG09c-0006H6-Sp; Fri, 17 Jul 2015 09:33:56 +0200 Received: from mpa by dude.hi.pengutronix.de with local (Exim 4.86_RC4) (envelope-from ) id 1ZG21K-0007WE-SG; Fri, 17 Jul 2015 11:33:30 +0200 From: Markus Pargmann To: Linus Walleij Subject: [PATCH 5/9] gpiolib: Implement gpio_name_to_desc() Date: Fri, 17 Jul 2015 11:32:46 +0200 Message-Id: <1437125570-28623-6-git-send-email-mpa@pengutronix.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1437125570-28623-1-git-send-email-mpa@pengutronix.de> References: <1437125570-28623-1-git-send-email-mpa@pengutronix.de> X-SA-Exim-Connect-IP: 2001:67c:670:100:1d::7 X-SA-Exim-Mail-From: mpa@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150717_023359_534666_02D05CEB X-CRM114-Status: GOOD ( 12.65 ) X-Spam-Score: -3.2 (---) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Markus Pargmann , Alexandre Courbot , kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-5.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Implement a function to translate a gpio name to a descriptor. Signed-off-by: Markus Pargmann --- drivers/gpio/gpiolib.c | 32 ++++++++++++++++++++++++++++++++ include/linux/gpio/consumer.h | 7 +++++++ 2 files changed, 39 insertions(+) diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 9f402b159cbe..dcac3bcf21dd 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -90,6 +90,38 @@ struct gpio_desc *gpio_to_desc(unsigned gpio) EXPORT_SYMBOL_GPL(gpio_to_desc); /** + * Convert a GPIO name to its descriptor + */ +struct gpio_desc *gpio_name_to_desc(const char *name) +{ + struct gpio_chip *chip; + unsigned long flags; + + spin_lock_irqsave(&gpio_lock, flags); + + list_for_each_entry(chip, &gpio_chips, list) { + int i; + + for (i = 0; i != chip->ngpio; ++i) { + struct gpio_desc *gpio = &chip->desc[i]; + + if (!gpio->name) + continue; + + if (!strcmp(gpio->name, name)) { + spin_unlock_irqrestore(&gpio_lock, flags); + return gpio; + } + } + } + + spin_unlock_irqrestore(&gpio_lock, flags); + + return NULL; +} +EXPORT_SYMBOL_GPL(gpio_name_to_desc); + +/** * Get the GPIO descriptor corresponding to the given hw number for this chip. */ struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, diff --git a/include/linux/gpio/consumer.h b/include/linux/gpio/consumer.h index adac255aee86..a873b8b47ab3 100644 --- a/include/linux/gpio/consumer.h +++ b/include/linux/gpio/consumer.h @@ -130,6 +130,7 @@ int gpiod_to_irq(const struct gpio_desc *desc); /* Convert between the old gpio_ and new gpiod_ interfaces */ struct gpio_desc *gpio_to_desc(unsigned gpio); int desc_to_gpio(const struct gpio_desc *desc); +struct gpio_desc *gpio_name_to_desc(const char *name); /* Child properties interface */ struct fwnode_handle; @@ -400,6 +401,12 @@ static inline struct gpio_desc *gpio_to_desc(unsigned gpio) { return ERR_PTR(-EINVAL); } + +static inline struct gpio_desc *gpio_name_to_desc(const char *name) +{ + return ERR_PTR(-EINVAL); +} + static inline int desc_to_gpio(const struct gpio_desc *desc) { /* GPIO can never have been requested */