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-rw-r--r--include/hardware/power.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/hardware/power.h b/include/hardware/power.h
index af7799e..10612f3 100644
--- a/include/hardware/power.h
+++ b/include/hardware/power.h
@@ -116,7 +116,8 @@ typedef struct power_module {
* User is interacting with the device, for example, touchscreen
* events are incoming. CPU and GPU load may be expected soon,
* and it may be appropriate to raise speeds of CPU, memory bus,
- * etc. The data parameter is unused.
+ * etc. The data parameter is the estimated length of the interaction
+ * in milliseconds, or 0 if unknown.
*
* POWER_HINT_LOW_POWER
*