From patchwork Fri Jul 17 09:32:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Pargmann X-Patchwork-Id: 6814571 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 7CCEE9F2E8 for ; Fri, 17 Jul 2015 09:35:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B2DA42062D for ; Fri, 17 Jul 2015 09:35:57 +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 D05DA20622 for ; Fri, 17 Jul 2015 09:35:56 +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 1ZG224-0003ay-1y; Fri, 17 Jul 2015 09:34:16 +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 1ZG21i-0003GD-AT for linux-arm-kernel@lists.infradead.org; Fri, 17 Jul 2015 09:33:55 +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-0006H9-Ti; 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-0007WS-Vk; Fri, 17 Jul 2015 11:33:30 +0200 From: Markus Pargmann To: Linus Walleij Subject: [PATCH 8/9] gpiolib-sysfs: Show gpio-name in /sys/class/gpio/gpio*/name Date: Fri, 17 Jul 2015 11:32:49 +0200 Message-Id: <1437125570-28623-9-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_023354_569469_4A9EF70B X-CRM114-Status: UNSURE ( 9.31 ) X-CRM114-Notice: Please train this message. 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 This patch adds a sysfs attribute 'name' to gpios that were exported. It exposes the newly added name property of gpio descriptors. Signed-off-by: Markus Pargmann --- drivers/gpio/gpiolib-sysfs.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpio/gpiolib-sysfs.c b/drivers/gpio/gpiolib-sysfs.c index c3b74440ca67..058019879bab 100644 --- a/drivers/gpio/gpiolib-sysfs.c +++ b/drivers/gpio/gpiolib-sysfs.c @@ -139,6 +139,25 @@ static ssize_t value_store(struct device *dev, } static DEVICE_ATTR_RW(value); +static ssize_t gpio_name_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct gpio_desc *desc = dev_get_drvdata(dev); + ssize_t status; + + mutex_lock(&sysfs_lock); + + if (!test_bit(FLAG_EXPORT, &desc->flags)) + status = -EIO; + else + status = sprintf(buf, "%s\n", desc->name); + + mutex_unlock(&sysfs_lock); + return status; +} + +static DEVICE_ATTR(name, 0444, gpio_name_show, NULL); + static irqreturn_t gpio_sysfs_irq(int irq, void *priv) { struct gpiod_data *data = priv; @@ -377,6 +396,7 @@ static struct attribute *gpio_attrs[] = { &dev_attr_edge.attr, &dev_attr_value.attr, &dev_attr_active_low.attr, + &dev_attr_name.attr, NULL, };