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From: Kate Hsuan <hpa@redhat.com>
To: Pavel Machek <pavel@ucw.cz>,
	Lee Jones <lee@kernel.org>,
	linux-leds@vger.kernel.org,
	platform-driver-x86@vger.kernel.org,
	Hans de Goede <hdegoede@redhat.com>,
	=?UTF-8?q?Ilpo=20J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,
	=?UTF-8?q?Andr=C3=A9=20Apitzsch?= <git@apitzsch.eu>,
	linux-kernel@vger.kernel.org,
	Andy Shevchenko <andy.shevchenko@gmail.com>,
	Sebastian Reichel <sre@kernel.org>,
	linux-pm@vger.kernel.org
Cc: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Subject: [PATCH v7 4/6] leds: trigger: Add led_mc_trigger_event() function
Date: Wed, 24 Apr 2024 14:52:10 +0800
Message-ID: <20240424065212.263784-5-hpa@redhat.com>
In-Reply-To: <20240424065212.263784-1-hpa@redhat.com>
References: <20240424065212.263784-1-hpa@redhat.com>
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From: Hans de Goede <hdegoede@redhat.com>

Add a new led_mc_trigger_event() function for triggers which want to
change the color of a multi-color LED based on their trigger conditions.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
---
 drivers/leds/led-triggers.c | 20 ++++++++++++++++++++
 include/linux/leds.h        |  6 ++++++
 2 files changed, 26 insertions(+)

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index bd59a14a4a90..fcc4e7a7b12b 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -380,6 +380,26 @@ void led_trigger_event(struct led_trigger *trig,
 }
 EXPORT_SYMBOL_GPL(led_trigger_event);
 
+void led_mc_trigger_event(struct led_trigger *trig,
+			  unsigned int *intensity_value, unsigned int num_colors,
+			  enum led_brightness brightness)
+{
+	struct led_classdev *led_cdev;
+
+	if (!trig)
+		return;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(led_cdev, &trig->led_cdevs, trig_list) {
+		if (!(led_cdev->flags & LED_MULTI_COLOR))
+			continue;
+
+		led_mc_set_brightness(led_cdev, intensity_value, num_colors, brightness);
+	}
+	rcu_read_unlock();
+}
+EXPORT_SYMBOL_GPL(led_mc_trigger_event);
+
 static void led_trigger_blink_setup(struct led_trigger *trig,
 			     unsigned long delay_on,
 			     unsigned long delay_off,
diff --git a/include/linux/leds.h b/include/linux/leds.h
index fed88eb9e170..5378e4cd03ff 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -526,6 +526,9 @@ void led_trigger_register_simple(const char *name,
 				struct led_trigger **trigger);
 void led_trigger_unregister_simple(struct led_trigger *trigger);
 void led_trigger_event(struct led_trigger *trigger,  enum led_brightness event);
+void led_mc_trigger_event(struct led_trigger *trig,
+			  unsigned int *intensity_value, unsigned int num_colors,
+			  enum led_brightness brightness);
 void led_trigger_blink(struct led_trigger *trigger, unsigned long delay_on,
 		       unsigned long delay_off);
 void led_trigger_blink_oneshot(struct led_trigger *trigger,
@@ -562,6 +565,9 @@ static inline void led_trigger_register_simple(const char *name,
 static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
 static inline void led_trigger_event(struct led_trigger *trigger,
 				enum led_brightness event) {}
+static inline void led_mc_trigger_event(struct led_trigger *trig,
+				unsigned int *intensity_value, unsigned int num_colors,
+				enum led_brightness brightness) {}
 static inline void led_trigger_blink(struct led_trigger *trigger,
 				      unsigned long delay_on,
 				      unsigned long delay_off) {}
-- 
2.44.0