From patchwork Fri Oct 7 14:56:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Jacques Hiblot X-Patchwork-Id: 613470 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70E59C43219 for ; Fri, 7 Oct 2022 14:56:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229901AbiJGO4z (ORCPT ); Fri, 7 Oct 2022 10:56:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33782 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229838AbiJGO4y (ORCPT ); Fri, 7 Oct 2022 10:56:54 -0400 Received: from smtpout1.mo528.mail-out.ovh.net (smtpout1.mo528.mail-out.ovh.net [46.105.34.251]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80EBCB03FA; Fri, 7 Oct 2022 07:56:52 -0700 (PDT) Received: from pro2.mail.ovh.net (unknown [10.109.146.13]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 009C512E155C3; Fri, 7 Oct 2022 16:56:50 +0200 (CEST) Received: from localhost.localdomain (88.161.25.233) by DAG1EX1.emp2.local (172.16.2.1) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.12; Fri, 7 Oct 2022 16:56:50 +0200 From: Jean-Jacques Hiblot To: , , , , CC: , , , , , , , , Jean-Jacques Hiblot Subject: [PATCH v4 3/6] leds: provide devm_of_led_get_optional() Date: Fri, 7 Oct 2022 16:56:38 +0200 Message-ID: <20221007145641.3307075-4-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221007145641.3307075-1-jjhiblot@traphandler.com> References: <20221007145641.3307075-1-jjhiblot@traphandler.com> MIME-Version: 1.0 X-Originating-IP: [88.161.25.233] X-ClientProxiedBy: CAS1.emp2.local (172.16.1.1) To DAG1EX1.emp2.local (172.16.2.1) X-Ovh-Tracer-Id: 4481926058042800603 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvfedrfeeijedgkeefucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuqfggjfdpvefjgfevmfevgfenuceurghilhhouhhtmecuhedttdenucenucfjughrpefhvfevufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpeflvggrnhdqlfgrtghquhgvshcujfhisghlohhtuceojhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmqeenucggtffrrghtthgvrhhnpeduteevleevvefggfdvueffffejhfehheeuiedtgedtjeeghfehueduudegfeefueenucfkpheptddrtddrtddrtddpkeekrdduiedurddvhedrvdeffeenucevlhhushhtvghrufhiiigvpeegnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhhtpdhhvghlohepphhrohdvrdhmrghilhdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepjhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmpdhnsggprhgtphhtthhopedupdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdfovfetjfhoshhtpehmohehvdek Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org This version of devm_of_led_get() doesn't fail if a LED is not found. Instead it returns a NULL pointer. Signed-off-by: Jean-Jacques Hiblot Reviewed-by: Andy Shevchenko --- drivers/leds/led-class.c | 25 +++++++++++++++++++++++++ include/linux/leds.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 2c0d979d0c8a..2fea79a2300d 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -295,6 +295,31 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev, } EXPORT_SYMBOL_GPL(devm_of_led_get); +/** + * devm_of_led_get_optional - Resource-managed request of an optional LED device + * @dev: LED consumer + * @index: index of the LED to obtain in the consumer + * + * The device node of the device is parse to find the request LED device. + * The LED device returned from this function is automatically released + * on driver detach. + * + * @return a pointer to a LED device, ERR_PTR(errno) on failure and NULL if the + * led was not found. + */ +struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev, + int index) +{ + struct led_classdev *led; + + led = devm_of_led_get(dev, index); + if (IS_ERR(led) && PTR_ERR(led) == -ENOENT) + return NULL; + + return led; +} +EXPORT_SYMBOL_GPL(devm_of_led_get_optional); + static int led_classdev_next_name(const char *init_name, char *name, size_t len) { diff --git a/include/linux/leds.h b/include/linux/leds.h index ba4861ec73d3..41df18f42d00 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -215,6 +215,8 @@ extern struct led_classdev *of_led_get(struct device_node *np, int index); extern void led_put(struct led_classdev *led_cdev); struct led_classdev *__must_check devm_of_led_get(struct device *dev, int index); +struct led_classdev *__must_check devm_of_led_get_optional(struct device *dev, + int index); /** * led_blink_set - set blinking with software fallback