From patchwork Thu Nov 17 16:04:45 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: 21757 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:f944:0:0:0:0:0 with SMTP id q4csp482944wrr; Thu, 17 Nov 2022 08:06:36 -0800 (PST) X-Google-Smtp-Source: AA0mqf6Xyn5eoUJfbSk0okvtLXFU2i3gX9tg+fCLjK4RYjrOnYBHQmQWupKU0runfDW0UA7RPBW0 X-Received: by 2002:a17:907:2c57:b0:7ad:9893:fba9 with SMTP id hf23-20020a1709072c5700b007ad9893fba9mr2630721ejc.62.1668701196220; Thu, 17 Nov 2022 08:06:36 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1668701196; cv=none; d=google.com; s=arc-20160816; b=ZhAL9O3cqchvwDiNUq4e0P4i6fg/1zez0PVaO7LsQGapqWszBHKLm9sVNJoC3ClJFb 6v6l0XS5FXN3s/t7p/JmoP+xTDYzTsIKgsB47O94RFNBQQEfo5UYXWDNZ2oYa/WQGvSf rdzo893W0KSau6SY3YRUwPiECjfPYCZEI4lf+lSh8lspT/VLhoswACkn+jSmFir84bVG nBQdz9hjgBH4V2uPfNHEHloEGNA+f8zyuBqgDRhbR07dyz1Pbanrgk0H+oeFIGZHDtmP 0ahPPL8r67yx29XG2NJY4sFEpyQDYJrdGnyf2xdrxwYnAe7xSx0p/auNcS5aquhgIRLl bS/Q== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=7YmrycyQSkOTV95UUQRpxRpHneGhZg4EWdLutObLBFg=; b=btRbYIVHLaZBcF6Apja4HSTn00oDA30zRV520vp9XodtJYuUlkQumUzW7H2BF22Lnu ViW+lgccGPSM5ztFoPeO/6y6bdRUaRx2j60gsjCgKxSgV+6BuUoF6b3skaaNKU/lhvnn 3gYJUN1+fDeLplfjtujeLYMIAhrIOZCPncK7O/SPMjqyV7JDYkLPL54kjSNe0rYwmmqc kKtlHtzynIB/yhgiMRCDWl7Qy7SVouicqrDsw/TUruorY2CVfzee9I5O0zSGkUcCHnBF Or/OSwFT1ypZrq3Im9k0N4Afd+iEEk/heQvMGO3zBMUFIhGvRCTJ36tSbOkDqbjNFw54 TroQ== ARC-Authentication-Results: i=1; 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: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id b17-20020a056402351100b0045cf2d0357asi1256395edd.34.2022.11.17.08.06.10; Thu, 17 Nov 2022 08:06:36 -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 S234814AbiKQQFS (ORCPT + 99 others); Thu, 17 Nov 2022 11:05:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239739AbiKQQFA (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 E4AF143AE2; Thu, 17 Nov 2022 08:04:58 -0800 (PST) Received: from pro2.mail.ovh.net (unknown [10.109.143.168]) by mo528.mail-out.ovh.net (Postfix) with ESMTPS id B0B0D13CAD69A; 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 4/6] leds: class: store the color index in struct led_classdev Date: Thu, 17 Nov 2022 17:04:45 +0100 Message-ID: <20221117160447.294491-5-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: 6604528857658374619 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?1749760025439908128?= X-GMAIL-MSGID: =?utf-8?q?1749760025439908128?= This information might be useful for more than only deriving the led's name. And since we have this information, we can expose it in the sysfs. Signed-off-by: Jean-Jacques Hiblot --- Documentation/ABI/testing/sysfs-class-led | 9 +++++++++ drivers/leds/led-class.c | 20 ++++++++++++++++++++ include/linux/leds.h | 1 + 3 files changed, 30 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-class-led b/Documentation/ABI/testing/sysfs-class-led index 2e24ac3bd7ef..e3ae9111b70d 100644 --- a/Documentation/ABI/testing/sysfs-class-led +++ b/Documentation/ABI/testing/sysfs-class-led @@ -59,6 +59,15 @@ Description: brightness. Reading this file when no hw brightness change event has happened will return an ENODATA error. +What: /sys/class/leds//color +Date: October 2022 +KernelVersion: 6.1 +Description: + Color of the led. + + This is a read-only file. Reading this file returns the color + of the led as a string (ex: "red", "green"). + What: /sys/class/leds//trigger Date: March 2006 KernelVersion: 2.6.17 diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 9cddcd908bce..4432e85a5fc6 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -74,6 +74,18 @@ static ssize_t max_brightness_show(struct device *dev, } static DEVICE_ATTR_RO(max_brightness); +static ssize_t color_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + const char *color_text = "invalid"; + struct led_classdev *led_cdev = dev_get_drvdata(dev); + + if (led_cdev->color < LED_COLOR_ID_MAX) + color_text = led_colors[led_cdev->color]; + return sysfs_emit(buf, "%s\n", color_text); +} +static DEVICE_ATTR_RO(color); + #ifdef CONFIG_LEDS_TRIGGERS static BIN_ATTR(trigger, 0644, led_trigger_read, led_trigger_write, 0); static struct bin_attribute *led_trigger_bin_attrs[] = { @@ -88,6 +100,7 @@ static const struct attribute_group led_trigger_group = { static struct attribute *led_class_attrs[] = { &dev_attr_brightness.attr, &dev_attr_max_brightness.attr, + &dev_attr_color.attr, NULL, }; @@ -375,6 +388,10 @@ int led_classdev_register_ext(struct device *parent, if (fwnode_property_present(init_data->fwnode, "retain-state-shutdown")) led_cdev->flags |= LED_RETAIN_AT_SHUTDOWN; + + if (fwnode_property_present(init_data->fwnode, "color")) + fwnode_property_read_u32(init_data->fwnode, "color", + &led_cdev->color); } } else { proposed_name = led_cdev->name; @@ -384,6 +401,9 @@ int led_classdev_register_ext(struct device *parent, if (ret < 0) return ret; + if (led_cdev->color >= LED_COLOR_ID_MAX) + dev_warn(parent, "LED %s color identifier out of range\n", final_name); + mutex_init(&led_cdev->led_access); mutex_lock(&led_cdev->led_access); led_cdev->dev = device_create_with_groups(leds_class, parent, 0, diff --git a/include/linux/leds.h b/include/linux/leds.h index 41df18f42d00..9d38cb90331d 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -71,6 +71,7 @@ struct led_classdev { const char *name; unsigned int brightness; unsigned int max_brightness; + unsigned int color; int flags; /* Lower 16 bits reflect status */