From patchwork Fri Jul 28 15:37:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean-Jacques Hiblot X-Patchwork-Id: 707794 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 7F204C001E0 for ; Fri, 28 Jul 2023 15:37:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236509AbjG1Phs (ORCPT ); Fri, 28 Jul 2023 11:37:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234149AbjG1Phr (ORCPT ); Fri, 28 Jul 2023 11:37:47 -0400 Received: from 9.mo563.mail-out.ovh.net (9.mo563.mail-out.ovh.net [46.105.73.201]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7E3431BE8 for ; Fri, 28 Jul 2023 08:37:45 -0700 (PDT) Received: from director1.derp.mail-out.ovh.net (director1.derp.mail-out.ovh.net [51.68.80.175]) by mo563.mail-out.ovh.net (Postfix) with ESMTPS id 58EA4229C0; Fri, 28 Jul 2023 15:37:43 +0000 (UTC) Received: from director1.derp.mail-out.ovh.net (director1.derp.mail-out.ovh.net. [127.0.0.1]) by director1.derp.mail-out.ovh.net (inspect_sender_mail_agent) with SMTP for ; Fri, 28 Jul 2023 15:37:43 +0000 (UTC) Received: from pro2.mail.ovh.net (unknown [10.109.138.11]) by director1.derp.mail-out.ovh.net (Postfix) with ESMTPS id ED9EB2011DD; Fri, 28 Jul 2023 15:37:42 +0000 (UTC) Received: from traphandler.com (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 15.1.2507.27; Fri, 28 Jul 2023 17:37:42 +0200 From: Jean-Jacques Hiblot To: , , , , CC: , , , Jean-Jacques Hiblot , Andy Shevchenko Subject: [RESEND] [PATCH v11 1/4] leds: provide devm_of_led_get_optional() Date: Fri, 28 Jul 2023 17:37:28 +0200 Message-ID: <20230728153731.3742339-2-jjhiblot@traphandler.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230728153731.3742339-1-jjhiblot@traphandler.com> References: <20230728153731.3742339-1-jjhiblot@traphandler.com> MIME-Version: 1.0 X-Originating-IP: [88.161.25.233] X-ClientProxiedBy: CAS4.emp2.local (172.16.1.4) To DAG1EX1.emp2.local (172.16.2.1) X-Ovh-Tracer-Id: 16196914588195699079 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -100 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgedviedrieeigdekkecutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhvfevufffkffojghfggfgtghisehtkeertdertddtnecuhfhrohhmpeflvggrnhdqlfgrtghquhgvshcujfhisghlohhtuceojhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmqeenucggtffrrghtthgvrhhnpeduteevleevvefggfdvueffffejhfehheeuiedtgedtjeeghfehueduudegfeefueenucfkpheptddrtddrtddrtddpkeekrdduiedurddvhedrvdeffeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphhouhhtpdhhvghlohepughirhgvtghtohhruddruggvrhhprdhmrghilhdqohhuthdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepjhhjhhhisghlohhtsehtrhgrphhhrghnughlvghrrdgtohhmpdhnsggprhgtphhtthhopedupdhrtghpthhtoheplhhinhhugidqlhgvughssehvghgvrhdrkhgvrhhnvghlrdhorhhgpdfovfetjfhoshhtpehmohehieef Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add an optional variant of devm_of_led_get(). It behaves the same as devm_of_led_get() except where the LED doesn't exist. In this case, instead of returning -ENOENT, the function returns NULL. 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 4758da2b59cf..78068b06d009 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -402,6 +402,31 @@ void led_remove_lookup(struct led_lookup_data *led_lookup) } EXPORT_SYMBOL_GPL(led_remove_lookup); +/** + * 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 7d428100b42b..8740b4e47f88 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -313,6 +313,8 @@ 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