Messages in this thread Patch in this message |  | | From | Soren Brinkmann <> | Subject | [PATCH 4/7] clocksource/cadence_ttc: Adjust interval in clock notifier | Date | Fri, 8 Nov 2013 13:21:14 -0800 |
| |
The clockevent has to be reprogrammed if the timer's input clock frequency changes and the timer is in periodic mode, in order to maintain the correct timer interval.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com> --- drivers/clocksource/cadence_ttc_timer.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/clocksource/cadence_ttc_timer.c b/drivers/clocksource/cadence_ttc_timer.c index a92350b55d32..68a336038d8f 100644 --- a/drivers/clocksource/cadence_ttc_timer.c +++ b/drivers/clocksource/cadence_ttc_timer.c @@ -338,6 +338,10 @@ static int ttc_rate_change_clockevent_cb(struct notifier_block *nb, /* update cached frequency */ ttc->freq = ndata->new_rate; + if (ttcce->ce.mode == CLOCK_EVT_MODE_PERIODIC) + ttc_set_interval(ttc, DIV_ROUND_CLOSEST(ttc->freq, + PRESCALE * HZ)); + /* fall through */ } case PRE_RATE_CHANGE: -- 1.8.4.2
|  |