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[2620:137:e000::1:20]) by mx.google.com with ESMTP id fj20-20020a0564022b9400b00461be535949si1037602edb.424.2022.11.17.08.07.56; Thu, 17 Nov 2022 08:08:20 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240134AbiKQQFH (ORCPT + 99 others); Thu, 17 Nov 2022 11:05:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234918AbiKQQFA (ORCPT ); Thu, 17 Nov 2022 11:05:00 -0500 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 CBCFB43874; Thu, 17 Nov 2022 08:04:57 -0800 (PST) Received: from pro2.mail.ovh.net (unknown [10.109.143.168]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id 34E5D13CAD692; Thu, 17 Nov 2022 17:04:56 +0100 (CET) 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 15.1.2507.16; Thu, 17 Nov 2022 17:04:55 +0100 From: Jean-Jacques Hiblot To: , , , , CC: , , , , , , , , Jean-Jacques Hiblot Subject: [PATCH v6 3/6] leds: provide devm_of_led_get_optional() Date: Thu, 17 Nov 2022 17:04:44 +0100 Message-ID: <20221117160447.294491-4-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221117160447.294491-1-jjhiblot@traphandler.com> References: <20221117160447.294491-1-jjhiblot@traphandler.com> MIME-Version: 1.0 X-Originating-IP: [88.161.25.233] X-ClientProxiedBy: DAG1EX1.emp2.local (172.16.2.1) To DAG1EX1.emp2.local (172.16.2.1) X-Ovh-Tracer-Id: 6604528854974872027 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: 0 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedvgedrgeekgdekvdcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecunecujfgurhephffvvefufffkofgjfhgggfgtihesthekredtredttdenucfhrhhomheplfgvrghnqdflrggtqhhuvghsucfjihgslhhothcuoehjjhhhihgslhhothesthhrrghphhgrnhgulhgvrhdrtghomheqnecuggftrfgrthhtvghrnhepudetveelveevgffgvdeuffffjefhheehueeitdegtdejgefhheeuuddugeeffeeunecukfhppeduvdejrddtrddtrddupdekkedrudeiuddrvdehrddvfeefnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepuddvjedrtddrtddruddpmhgrihhlfhhrohhmpeeojhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmqedpnhgspghrtghpthhtohepuddprhgtphhtthhopehlvggvrdhjohhnvghssehlihhnrghrohdrohhrghdpphgrvhgvlhesuhgtfidrtgiipdhrohgshhdoughtsehkvghrnhgvlhdrohhrghdpshhvvghnrdhstghhfigvrhhmvghrseguihhsrhhuphhtihhvvgdqthgvtghhnhholhhoghhivghsrdgtohhmpdhkrhiihihsiihtohhfrdhkohiilhhofihskhhiodgutheslhhinhgrrhhordhorhhgpdhjohhhrghnodhlihhnrghroheskhgvrhhnvghlrdhorhhgpdhmrghrihhjnhdrshhuihhjthgvnhesshhomhgrih hnlhhinhgvrdhorhhgpdgsjhhorhhnrdgrnhguvghrshhsohhnsehlihhnrghrohdrohhrghdprghnugihrdhshhgvvhgthhgvnhhkohesghhmrghilhdrtghomhdpjhgrtggvkhdrrghnrghsiigvfihskhhisehgmhgrihhlrdgtohhmpdhlihhnuhigqdhlvggushesvhhgvghrrdhkvghrnhgvlhdrohhrghdpuggvvhhitggvthhrvggvsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdpoffvtefjohhsthepmhhohedvkedpmhhouggvpehsmhhtphhouhht X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1749760135561883751?= X-GMAIL-MSGID: =?utf-8?q?1749760135561883751?= 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..9cddcd908bce 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 parsed to find the requested 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