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: 497046 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 2AF9E140295 for ; Fri, 17 Jul 2015 19:33:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757396AbbGQJdf (ORCPT ); Fri, 17 Jul 2015 05:33:35 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:45005 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756674AbbGQJdd (ORCPT ); Fri, 17 Jul 2015 05:33:33 -0400 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 Cc: Alexandre Courbot , linux-gpio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, Markus Pargmann 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-gpio@vger.kernel.org Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org 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, };