From: Lucas Stach Date: Wed, 14 Oct 2015 09:24:17 +0000 (+0200) Subject: clocksource/drivers/imx: Allow timer irq affinity change X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f1c08c9bc8f475aa242270da30b6cc9232bd19e0;p=linux-beck.git 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 Signed-off-by: Daniel Lezcano --- 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);