counter: Introduce the Count capture component

Some devices provide a latch function to save historic Count values. This patch standardizes exposure of such functionality as Count capture components. A COUNTER_COMP_CAPTURE macro is provided for driver authors to define a capture component. A new event COUNTER_EVENT_CAPTURE is introduced to represent Count value capture events.

William Breathitt Gray committed 4 years ago

Commit 45d29181 parent 98302883 files · +12 −0Browse files

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include/uapi/linux/counter.h+2−0

@@ -63,6 +63,8 @@ enum counter_event_type { · 62 unmodified lines
63	63	COUNTER_EVENT_INDEX,
64	64	/* State of counter is changed */
65	65	COUNTER_EVENT_CHANGE_OF_STATE,
	66	+ /* Count value captured */
	67	+ COUNTER_EVENT_CAPTURE,
66	68	};
67	69
68	70	/**