Thread (1 message) 1 message, 1 author, 2016-03-30

[PATCH v3 1/4] thermal: send notifications for cdev state change

From: Srikar Srimath Tirumala <hidden>
Date: 2016-03-30 00:41:34
Also in: linux-pm
Subsystem: the rest, thermal · Maintainers: Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano

Possibly related (same subject, not in this thread)

Send notifications using sysfs_notify to indicate that a cooling
device cur state has changed. This can alert the listeners that
hardware clocks are about to be throttled.

A listening user space application can use this notification to
perform workload throttling.

Change-Id: I71cd6d11bff87f181fa3b7db36bf6c953d1d77eb
Signed-off-by: Srikar Srimath Tirumala <redacted>
---
 drivers/thermal/thermal_core.c | 1 +
 1 file changed, 1 insertion(+)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index d4b5465..b09fff1 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1642,6 +1642,7 @@ void thermal_cdev_update(struct thermal_cooling_device *cdev)
 	cdev->updated = true;
 	trace_cdev_update(cdev, target);
 	dev_dbg(&cdev->device, "set to state %lu\n", target);
+	sysfs_notify(&cdev->device.kobj, NULL, "cur_state");
 }
 EXPORT_SYMBOL(thermal_cdev_update);
 
-- 
2.1.4
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