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=-13.7 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 C2758C43387 for ; Wed, 9 Jan 2019 14:45:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8EE8721841 for ; Wed, 9 Jan 2019 14:45:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547045104; bh=LEtO+UoHqcmfND7IGEIzZ+sWE34NKxUVs5hJGrLWaGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=KlYygX4MRxe5C3TPKl/guyAQ02JZ/Yhy/Wp9ZCqiPE9Xlpr4cG83T1tueo002OOBi TY6TUb5kfRQ6nEfyRRvqkt5WZxThlQZpNdcYEoQg3S1+2Cu+FtR6rpgXR82KHg5u/b 2YnIgUUqYMw862A6tYolevkmNuCndjwsX9qAdXyg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731808AbfAIOpD (ORCPT ); Wed, 9 Jan 2019 09:45:03 -0500 Received: from mail.kernel.org ([198.145.29.99]:48294 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731772AbfAIOpA (ORCPT ); Wed, 9 Jan 2019 09:45:00 -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 D0CE820859; Wed, 9 Jan 2019 14:44:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547045100; bh=LEtO+UoHqcmfND7IGEIzZ+sWE34NKxUVs5hJGrLWaGA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g+6F6/boTBXDWDztV/9RRVBR3X9f3bmcjbvT5yLutKleFcKhpgcZe9PARRwLX1rnR oYe+bdc6ewoH10LqJSH5SHEPvkY/o+da/+8IgKQY4rA50mWq4EIwa5AnQjeUlTWFKO HBhzIKqCnm5GoUYNH90+mceOMkJJPHncw3rgjsP8= From: Krzysztof Kozlowski To: Jacek Anaszewski , Pavel Machek , Rob Herring , Mark Rutland , linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, devicetree@vger.kernel.org Cc: Krzysztof Kozlowski Subject: [PATCH v7 2/5] leds: Add helper for getting default pattern from Device Tree Date: Wed, 9 Jan 2019 15:44:46 +0100 Message-Id: <1547045089-19128-3-git-send-email-krzk@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1547045089-19128-1-git-send-email-krzk@kernel.org> References: <1547045089-19128-1-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 --- drivers/leds/led-core.c | 30 ++++++++++++++++++++++++++++++ include/linux/leds.h | 13 +++++++++++++ 2 files changed, 43 insertions(+) diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index ede4fa0ac2cc..e3da7c03da1b 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -16,7 +16,9 @@ #include #include #include +#include #include +#include #include "leds.h" DECLARE_RWSEM(leds_list_lock); @@ -310,6 +312,34 @@ int led_update_brightness(struct led_classdev *led_cdev) } EXPORT_SYMBOL_GPL(led_update_brightness); +u32 *led_get_default_pattern(struct led_classdev *led_cdev, unsigned int *size) +{ + struct device_node *np = dev_of_node(led_cdev->dev); + u32 *pattern; + int count; + + if (!np) + return NULL; + + count = of_property_count_u32_elems(np, "led-pattern"); + if (count < 0) + return NULL; + + pattern = kcalloc(count, sizeof(*pattern), GFP_KERNEL); + if (!pattern) + return NULL; + + if (of_property_read_u32_array(np, "led-pattern", pattern, count)) { + kfree(pattern); + return NULL; + } + + *size = count; + + return pattern; +} +EXPORT_SYMBOL_GPL(led_get_default_pattern); + /* Caller must ensure led_cdev->led_access held */ void led_sysfs_disable(struct led_classdev *led_cdev) { diff --git a/include/linux/leds.h b/include/linux/leds.h index 5263f87e1d2c..78204650fe2a 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -219,6 +219,19 @@ extern int led_set_brightness_sync(struct led_classdev *led_cdev, extern int led_update_brightness(struct led_classdev *led_cdev); /** + * led_get_default_pattern - return default pattern + * + * @led_cdev: the LED to get default pattern for + * @size: pointer for storing the number of elements in returned array, + * modified only if return != NULL + * + * Return: Allocated array of integers with default pattern from device tree + * or NULL. Caller is responsible for kfree(). + */ +extern u32 *led_get_default_pattern(struct led_classdev *led_cdev, + unsigned int *size); + +/** * led_sysfs_disable - disable LED sysfs interface * @led_cdev: the LED to set * -- 2.7.4