On 11/08/2013 10:21 PM, Soren Brinkmann wrote:
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@xxxxxxxxxx> --- 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)); +
Couldn't be racy ?
/* fall through */ } case PRE_RATE_CHANGE:
-- <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | <http://twitter.com/#!/linaroorg> Twitter | <http://www.linaro.org/linaro-blog/> Blog -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
