From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 06DB8C04EB8 for ; Wed, 12 Dec 2018 11:17:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C168A20870 for ; Wed, 12 Dec 2018 11:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544613442; bh=7xHCYizesvYnu/KL2SjvuSvfNjnDIK5ROI9TpnBylj4=; h=From:To:Subject:Date:In-Reply-To:References:List-ID:From; b=TaYOPzwGa+/X5Ijs1pWmNBIqgQPFslKv/N+EBN9rzExD7duCHQaCW2AdGlne4QLXS gZL5PU3E6PtQZjKHdROHxM/OrzfxoTOi/rAJRVZJ1D+Bi0nnj+IAevnCTsAGuPHVmJ r6ED6XXfSQd41h2kGeGpyh8k6FJ7nXosWSUNNrJw= DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C168A20870 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727418AbeLLLRV (ORCPT ); Wed, 12 Dec 2018 06:17:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:44764 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727276AbeLLLQ6 (ORCPT ); Wed, 12 Dec 2018 06:16:58 -0500 Received: from PC-kkoz.proceq.com (unknown [213.160.61.66]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 74C4620870; Wed, 12 Dec 2018 11:16:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544613418; bh=7xHCYizesvYnu/KL2SjvuSvfNjnDIK5ROI9TpnBylj4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=ZzaxuoQuOgLg82tHGmXVegKS+AIMPDM2LJi6X5sNuc8m/JW/gmAScsJlbroZ2jBdZ jAjgIN5HgEIxFQ+uwJvBaYvJBB60Rv7uc0/Ya7sxDVIEvQO4xcZWaXGFmCXrzNUrSg WkTwMGe0H6pECYl7Ghigp4uVV6M7GeyKvZj1dRvE= From: Krzysztof Kozlowski To: Jacek Anaszewski , Pavel Machek , Rob Herring , Mark Rutland , Krzysztof Kozlowski , Baolin Wang , linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 2/5] leds: Add helper for getting default pattern from Device Tree Date: Wed, 12 Dec 2018 12:16:43 +0100 Message-Id: <1544613406-27026-3-git-send-email-krzk@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1544613406-27026-1-git-send-email-krzk@kernel.org> References: <1544613406-27026-1-git-send-email-krzk@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Multiple LED triggers might need to access default pattern so add a helper for that. Signed-off-by: Krzysztof Kozlowski --- New patch in the series --- drivers/leds/led-class.c | 25 +++++++++++++++++++++++++ include/linux/leds.h | 3 +++ 2 files changed, 28 insertions(+) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 3c7e3487b373..44b95e6480f6 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -244,6 +245,30 @@ static int led_classdev_next_name(const char *init_name, char *name, } /** + * led_classdev_get_default_pattern - return default pattern + * + * @led_cdev: the led_classdev structure for this device + * + * Return: Null terminated string with default pattern from DeviceTree or NULL + */ +const char *led_classdev_get_default_pattern(struct led_classdev *led_cdev) +{ + struct device_node *np = dev_of_node(led_cdev->dev); + const char *pattern; + + if (!np) + return NULL; + + if (of_property_read_string(np, "led-pattern", &pattern)) + return NULL; + + if (!strlen(pattern)) + return NULL; + + return pattern; +} + +/** * of_led_classdev_register - register a new object of led_classdev class. * * @parent: parent of LED device diff --git a/include/linux/leds.h b/include/linux/leds.h index 5263f87e1d2c..9da2bfa183ea 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -129,6 +129,9 @@ struct led_classdev { struct mutex led_access; }; +extern const char * +led_classdev_get_default_pattern(struct led_classdev *led_cdev); + extern int of_led_classdev_register(struct device *parent, struct device_node *np, struct led_classdev *led_cdev); -- 2.7.4