[RFC v6 13/23] clockevents: introduce CLOCK_EVT_FEAT_NO_ADJUST flag

Nicolai Stange
2016-09-09T20:01:29Z

Upcoming changes to the clockevent core will make it adjusting a clockevent
device's mult/shift pair in order to compensate for NTP corrections made
by the timekeeping core.

For certain devices this behaviour is unwanted. Introduce the
CLOCK_EVT_FEAT_NO_ADJUST flag that, when being set, will cause a clockevent
device to be excluded from those adjustments.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
---
include/linux/clockchips.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index a116926..9a25185 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -66,6 +66,12 @@ enum clock_event_state {
*/
# define CLOCK_EVT_FEAT_HRTIMER 0x000080

+/*
+ * Clockevent device's mult/shift pair shall not get adjusted in order
+ * to compensate for NTP corrections made in the timekeeping core.
+ */
+# define CLOCK_EVT_FEAT_NO_ADJUST 0x000100
+
/**
* struct clock_event_device - clock event device descriptor
* @event_handler: Assigned by the framework to be called by the low
--
2.9.3