From patchwork Wed Apr 24 06:52:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kate Hsuan X-Patchwork-Id: 13641402 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B3FAA157491 for ; Wed, 24 Apr 2024 06:53:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713941623; cv=none; b=Pr1zNUthOhl820PRhmF+E+xG2/pKyeDmaPHbtfoDCgvxH4C6kTXY6QaNKIIfeEXscbwqpoRnqWoyg2QgA9oN4Te1PGQGSE/BgIIUwUf0qQCOKlC6Osad18TNDsAOagHcX8ABQwC6eLXeq1sCDn37bFlXiSNegM+mJwlTaN7dhKo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713941623; c=relaxed/simple; bh=s+B8ItYGzoVn3So0dJK256cBhZJIrk8qxByoCNTGHQ4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=O9ECkDQvcDLNR8uOt2GZeO3mobC/+HyvvefYjE4jYLiMFsGj91QPKOYl+lshdrngL7uxSjBxgbjd2/A7POcLuT4WEMYld6PFr7nzciMTis3rKLAjQI63fldCm0SWT1uQM3PjigyV6aKDD+Afsc2hSoG2sryqFdWf4wSzqPt975U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=eEHcU16T; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="eEHcU16T" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1713941620; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=rNiL/A8mDEhqkF3QERPEG//s8LAwW5c1zyzjl4us3zs=; b=eEHcU16TRawul6/3U7Xz51xgrqcjIA+OkJ9llRM8mtlboJaPrj187++IbOpoDt/YnGDo6L UpvuIDepcBG7kL48AiM+sm92Y7ukCSGvoiq4CYWdSUX5kh17DeaTQWP+CMPsJGmcZk0fSP xxy3jDdjKGA2OQJqVXHiIqOdBLxUjaw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-586-PeAeIT9ZNXyhbIGxDSvkXg-1; Wed, 24 Apr 2024 02:53:37 -0400 X-MC-Unique: PeAeIT9ZNXyhbIGxDSvkXg-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A9C3D8032FA; Wed, 24 Apr 2024 06:53:36 +0000 (UTC) Received: from fedora.redhat.com (unknown [10.39.193.73]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2A658C13FA3; Wed, 24 Apr 2024 06:53:29 +0000 (UTC) From: Kate Hsuan To: Pavel Machek , Lee Jones , linux-leds@vger.kernel.org, platform-driver-x86@vger.kernel.org, Hans de Goede , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , =?utf-8?q?A?= =?utf-8?q?ndr=C3=A9_Apitzsch?= , linux-kernel@vger.kernel.org, Andy Shevchenko , Sebastian Reichel , linux-pm@vger.kernel.org Cc: Jacek Anaszewski Subject: [PATCH v7 3/6] leds: core: Add led_mc_set_brightness() function Date: Wed, 24 Apr 2024 14:52:09 +0800 Message-ID: <20240424065212.263784-4-hpa@redhat.com> In-Reply-To: <20240424065212.263784-1-hpa@redhat.com> References: <20240424065212.263784-1-hpa@redhat.com> Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.8 From: Hans de Goede Add a new led_mc_set_brightness() function for in kernel color/brightness changing of multi-color LEDs. led-class-multicolor can be build as a module and led_mc_set_brightness() will have the builtin callers, so put led_mc_set_brightness() inside led-core instead, just like how led_set_brightness() is part of the core and not of the led-class object. This also adds a new LED_MULTI_COLOR led_classdev flag to allow led_mc_set_brightness() to verify that it is operating on a multi-color LED classdev, avoiding casting the passed in LED classdev to a multi-color LED classdev, when it actually is not a multi-color LED. Signed-off-by: Hans de Goede Reviewed-by: Jacek Anaszewski --- drivers/leds/led-class-multicolor.c | 1 + drivers/leds/led-core.c | 31 +++++++++++++++++++++++++++++ include/linux/leds.h | 20 +++++++++++++++++++ 3 files changed, 52 insertions(+) diff --git a/drivers/leds/led-class-multicolor.c b/drivers/leds/led-class-multicolor.c index ec62a4811613..df01c0e66c8b 100644 --- a/drivers/leds/led-class-multicolor.c +++ b/drivers/leds/led-class-multicolor.c @@ -134,6 +134,7 @@ int led_classdev_multicolor_register_ext(struct device *parent, return -EINVAL; led_cdev = &mcled_cdev->led_cdev; + led_cdev->flags |= LED_MULTI_COLOR; mcled_cdev->led_cdev.groups = led_multicolor_groups; return led_classdev_register_ext(parent, led_cdev, init_data); diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c index 89c9806cc97f..ef7d1c6767ca 100644 --- a/drivers/leds/led-core.c +++ b/drivers/leds/led-core.c @@ -8,6 +8,7 @@ */ #include +#include #include #include #include @@ -362,6 +363,36 @@ int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value) } EXPORT_SYMBOL_GPL(led_set_brightness_sync); +/* + * This is a led-core function because just like led_set_brightness() + * it is used in the kernel by e.g. triggers. + */ +void led_mc_set_brightness(struct led_classdev *led_cdev, + unsigned int *intensity_value, unsigned int num_colors, + unsigned int brightness) +{ + struct led_classdev_mc *mcled_cdev; + unsigned int i; + + if (!(led_cdev->flags & LED_MULTI_COLOR)) { + dev_err_once(led_cdev->dev, "error not a multi-color LED\n"); + return; + } + + mcled_cdev = lcdev_to_mccdev(led_cdev); + if (num_colors != mcled_cdev->num_colors) { + dev_err_once(led_cdev->dev, "error num_colors mismatch %u != %u\n", + num_colors, mcled_cdev->num_colors); + return; + } + + for (i = 0; i < mcled_cdev->num_colors; i++) + mcled_cdev->subled_info[i].intensity = intensity_value[i]; + + led_set_brightness(led_cdev, brightness); +} +EXPORT_SYMBOL_GPL(led_mc_set_brightness); + int led_update_brightness(struct led_classdev *led_cdev) { int ret; diff --git a/include/linux/leds.h b/include/linux/leds.h index 4754b02d3a2c..fed88eb9e170 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -115,6 +115,7 @@ struct led_classdev { #define LED_BRIGHT_HW_CHANGED BIT(21) #define LED_RETAIN_AT_SHUTDOWN BIT(22) #define LED_INIT_DEFAULT_TRIGGER BIT(23) +#define LED_MULTI_COLOR BIT(24) /* set_brightness_work / blink_timer flags, atomic, private. */ unsigned long work_flags; @@ -392,6 +393,25 @@ void led_set_brightness(struct led_classdev *led_cdev, unsigned int brightness); */ int led_set_brightness_sync(struct led_classdev *led_cdev, unsigned int value); +/** + * led_mc_set_brightness - set mc LED color intensity values and brightness + * @led_cdev: the LED to set + * @intensity_value: array of per color intensity values to set + * @num_colors: amount of entries in intensity_value array + * @brightness: the brightness to set the LED to + * + * Set a multi-color LED's per color intensity values and brightness. + * If necessary, this cancels the software blink timer. This function is + * guaranteed not to sleep. + * + * Calling this function on a non multi-color led_classdev or with the wrong + * num_colors value is an error. In this case an error will be logged once + * and the call will do nothing. + */ +void led_mc_set_brightness(struct led_classdev *led_cdev, + unsigned int *intensity_value, unsigned int num_colors, + unsigned int brightness); + /** * led_update_brightness - update LED brightness * @led_cdev: the LED to query