From a5719a40aef956ba704f2aa1c7b977224d60fa96 Mon Sep 17 00:00:00 2001 From: Stuart Menefy Date: Sun, 10 Feb 2019 22:51:13 +0000 Subject: clocksource/drivers/exynos_mct: Move one-shot check from tick clear to ISR When a timer tick occurs and the clock is in one-shot mode, the timer needs to be stopped to prevent it triggering subsequent interrupts. Currently this code is in exynos4_mct_tick_clear(), but as it is only needed when an ISR occurs move it into exynos4_mct_tick_isr(), leaving exynos4_mct_tick_clear() just doing what its name suggests it should. Signed-off-by: Stuart Menefy Reviewed-by: Krzysztof Kozlowski Tested-by: Marek Szyprowski Cc: stable@vger.kernel.org # v4.3+ Signed-off-by: Daniel Lezcano --- drivers/clocksource/exynos_mct.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) (limited to 'drivers/clocksource') diff --git a/drivers/clocksource/exynos_mct.c b/drivers/clocksource/exynos_mct.c index 7a244b681876..1e325f89d408 100644 --- a/drivers/clocksource/exynos_mct.c +++ b/drivers/clocksource/exynos_mct.c @@ -388,6 +388,13 @@ static void exynos4_mct_tick_start(unsigned long cycles, exynos4_mct_write(tmp, mevt->base + MCT_L_TCON_OFFSET); } +static void exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) +{ + /* Clear the MCT tick interrupt */ + if (readl_relaxed(reg_base + mevt->base + MCT_L_INT_CSTAT_OFFSET) & 1) + exynos4_mct_write(0x1, mevt->base + MCT_L_INT_CSTAT_OFFSET); +} + static int exynos4_tick_set_next_event(unsigned long cycles, struct clock_event_device *evt) { @@ -420,8 +427,11 @@ static int set_state_periodic(struct clock_event_device *evt) return 0; } -static void exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) +static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id) { + struct mct_clock_event_device *mevt = dev_id; + struct clock_event_device *evt = &mevt->evt; + /* * This is for supporting oneshot mode. * Mct would generate interrupt periodically @@ -430,16 +440,6 @@ static void exynos4_mct_tick_clear(struct mct_clock_event_device *mevt) if (!clockevent_state_periodic(&mevt->evt)) exynos4_mct_tick_stop(mevt); - /* Clear the MCT tick interrupt */ - if (readl_relaxed(reg_base + mevt->base + MCT_L_INT_CSTAT_OFFSET) & 1) - exynos4_mct_write(0x1, mevt->base + MCT_L_INT_CSTAT_OFFSET); -} - -static irqreturn_t exynos4_mct_tick_isr(int irq, void *dev_id) -{ - struct mct_clock_event_device *mevt = dev_id; - struct clock_event_device *evt = &mevt->evt; - exynos4_mct_tick_clear(mevt); evt->event_handler(evt); -- cgit