From patchwork Tue May 3 11:04:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sven Schwermer X-Patchwork-Id: 570647 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 98816C433EF for ; Tue, 3 May 2022 11:05:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234558AbiECLIi (ORCPT ); Tue, 3 May 2022 07:08:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46496 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233840AbiECLIh (ORCPT ); Tue, 3 May 2022 07:08:37 -0400 Received: from mail.schwermer.no (mail.schwermer.no [49.12.228.226]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 689513389C; Tue, 3 May 2022 04:05:02 -0700 (PDT) X-Virus-Scanned: Yes From: Sven Schwermer DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=svenschwermer.de; s=mail; t=1651575899; bh=2uuu+yuJXc4Y3si40nnMPwy4Mz/cdP0i8l5Ix0V6TVU=; h=From:To:Cc:Subject:In-Reply-To:References; b=cqrRFVXpIDOxvl2xIXy+L8TKjfcSyYT+ZsI6epH0Bf0y9GeOBVyMGqhr0+Ts4zgCl L38rDk2Alw8QfFhwGj1eBa8ZPjVv2OrJtspfv7vY50opl1LrAeGpsUHQ4yX2V+hGTW ozkK1O8A7ntkEovZ3T2/h+1/gyTKAN9nYBhcUQQTKkWoMw/Ou4qQTH8TR/E9GyCz8N wFvZQM8660dPi4U8lm0tzfRySovjEwiM6eSm2AbFD7mHomCK9sX9TgbSx5D9WmVTzG h4G7yGnO1zmDUwgRHwuaRJIhCW9peCETVb3xcAxUbZpXxo8mxUfq5Q9tVfB3X7AOyK kFxklU3WYKwIw== To: linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, pavel@ucw.cz, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, dmurphy@ti.com, devicetree@vger.kernel.org Cc: Sven Schwermer Subject: [PATCH v1 2/2] leds: multicolor: Read default-intensities property Date: Tue, 3 May 2022 13:04:51 +0200 Message-Id: <03decec200aa7550f66be8454438eb3db6a2378a.1651575831.git.sven.schwermer@disruptive-technologies.com> In-Reply-To: <364df52a196fa0ae5db07e599995fcf8dfafb43e.1651575831.git.sven.schwermer@disruptive-technologies.com> References: <364df52a196fa0ae5db07e599995fcf8dfafb43e.1651575831.git.sven.schwermer@disruptive-technologies.com> Mime-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org From: Sven Schwermer This allows to assign intensity values taken from the firmware interface (if available) to the indivisual sub LEDs (colors) at driver probe time, i.e. most commonly at kernel boot time. This is crucial for setting a specific color and early in the boot process. While it would be possible to set a static color in the bootloader, this mechanism allows setting a pattern (e.g. blinking) at a specific color. Signed-off-by: Sven Schwermer --- drivers/leds/led-class-multicolor.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c index e317408583df..eb7f11345ec1 100644 --- a/drivers/leds/led-class-multicolor.c +++ b/drivers/leds/led-class-multicolor.c @@ -9,6 +9,7 @@ #include #include #include +#include #include "leds.h" @@ -116,6 +117,23 @@ static struct attribute *led_multicolor_attrs[] = { }; ATTRIBUTE_GROUPS(led_multicolor); +static void multi_load_default_intensities(struct device *parent, + struct led_classdev_mc *mcled_cdev, + struct fwnode_handle *fwnode) +{ + u32 intensities[LED_COLOR_ID_MAX]; + int ret; + int i; + + ret = fwnode_property_read_u32_array(fwnode, "default-intensities", + intensities, mcled_cdev->num_colors); + if (ret < 0 && ret != -ENODATA) + dev_warn(parent, "failed to read default-intensities property: %d", ret); + + for (i = 0; i < ret; i++) + mcled_cdev->subled_info[i].intensity = intensities[i]; +} + int led_classdev_multicolor_register_ext(struct device *parent, struct led_classdev_mc *mcled_cdev, struct led_init_data *init_data) @@ -134,6 +152,9 @@ int led_classdev_multicolor_register_ext(struct device *parent, led_cdev = &mcled_cdev->led_cdev; mcled_cdev->led_cdev.groups = led_multicolor_groups; + if (init_data && init_data->fwnode) + multi_load_default_intensities(parent, mcled_cdev, init_data->fwnode); + return led_classdev_register_ext(parent, led_cdev, init_data); } EXPORT_SYMBOL_GPL(led_classdev_multicolor_register_ext);