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authorLucas Stach <l.stach@pengutronix.de>2015-10-14 11:24:17 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2015-10-15 17:42:05 +0200
commitf1c08c9bc8f475aa242270da30b6cc9232bd19e0 (patch)
tree97f20c9e49c3998433212a7f2ca87e6309b20810 /drivers/clocksource
parent31f7987406497dc65408dee4e84e3f3cc3ffe9cd (diff)
downloadlinux-f1c08c9bc8f475aa242270da30b6cc9232bd19e0.tar.bz2
clocksource/drivers/imx: Allow timer irq affinity change
Allow the timer core to change the smp affinity of the broadcast timer irq by setting CLOCK_EVT_FEAT_DYNIRQ flag. For this to work the timer core needs to be told about the used irq. This reduces interrupt pressure and wakeups on CPU0 as well as vastly reducing the number of timer broadcast IPIs. Signed-off-by: Lucas Stach <l.stach@pengutronix.de> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/timer-imx-gpt.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c
index 839aba92fc39..99ec96769dda 100644
--- a/drivers/clocksource/timer-imx-gpt.c
+++ b/drivers/clocksource/timer-imx-gpt.c
@@ -305,13 +305,14 @@ static int __init mxc_clockevent_init(struct imx_timer *imxtm)
struct irqaction *act = &imxtm->act;
ced->name = "mxc_timer1";
- ced->features = CLOCK_EVT_FEAT_ONESHOT;
+ ced->features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_DYNIRQ;
ced->set_state_shutdown = mxc_shutdown;
ced->set_state_oneshot = mxc_set_oneshot;
ced->tick_resume = mxc_shutdown;
ced->set_next_event = imxtm->gpt->set_next_event;
ced->rating = 200;
ced->cpumask = cpumask_of(0);
+ ced->irq = imxtm->irq;
clockevents_config_and_register(ced, clk_get_rate(imxtm->clk_per),
0xff, 0xfffffffe);