linux-kernel - [PATCH v3 8/9] thermal/sysfs: Update governors when the 'weight' has changed

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Message-Id: <20231220231753.1824364-9-lukasz.luba@arm.com>
Date: Wed, 20 Dec 2023 23:17:52 +0000
From: Lukasz Luba <lukasz.luba@....com>
To: linux-kernel@...r.kernel.org,
	rafael@...nel.org
Cc: linux-pm@...r.kernel.org,
	daniel.lezcano@...aro.org,
	rui.zhang@...el.com,
	lukasz.luba@....com
Subject: [PATCH v3 8/9] thermal/sysfs: Update governors when the 'weight' has changed

Support governors update when the thermal instance's weight has changed.
This allows to adjust internal state for the governor.

Signed-off-by: Lukasz Luba <lukasz.luba@....com>
---
 drivers/thermal/thermal_sysfs.c | 3 +++
 include/linux/thermal.h         | 1 +
 2 files changed, 4 insertions(+)

diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c
index 299c0fb16593..5abf6d136c24 100644
--- a/drivers/thermal/thermal_sysfs.c
+++ b/drivers/thermal/thermal_sysfs.c
@@ -940,6 +940,9 @@ ssize_t weight_store(struct device *dev, struct device_attribute *attr,
 	/* Don't race with governors using the 'weight' value */
 	mutex_lock(&instance->tz->lock);
 	instance->weight = weight;
+
+	thermal_governor_update_tz(instance->tz,
+				   THERMAL_INSTANCE_WEIGHT_CHANGED);
 	mutex_unlock(&instance->tz->lock);
 
 	return count;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 1b76878cea46..a759570de364 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -53,6 +53,7 @@ enum thermal_notify_event {
 	THERMAL_EVENT_KEEP_ALIVE, /* Request for user space handler to respond */
 	THERMAL_TZ_BIND_CDEV, /* Cooling dev is bind to the thermal zone */
 	THERMAL_TZ_UNBIND_CDEV, /* Cooling dev is unbind from the thermal zone */
+	THERMAL_INSTANCE_WEIGHT_CHANGED, /* Thermal instance weight changed */
 };
 
 /**
-- 
2.25.1