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From: daniel.lezcano@linaro.org (Daniel Lezcano)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 8/9] clockevents/drivers/arm_global_timer: Implement ->set_state_oneshot_stopped()
Date: Thu, 25 Feb 2016 14:37:16 +0100	[thread overview]
Message-ID: <1456407438-6131-8-git-send-email-daniel.lezcano@linaro.org> (raw)
In-Reply-To: <1456407438-6131-1-git-send-email-daniel.lezcano@linaro.org>

From: Viresh Kumar <viresh.kumar@linaro.org>

set_state_oneshot_stopped() is called by the clkevt core, when the next
event is required at an expiry time of 'KTIME_MAX'. This normally
happens with NO_HZ_{IDLE|FULL} in both LOWRES/HIGHRES modes.

This patch makes the clockevent device to stop on such an event, to
avoid spurious interrupts, as explained by: commit 8fff52fd5093
("clockevents: Introduce CLOCK_EVT_STATE_ONESHOT_STOPPED state").

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
---
 drivers/clocksource/arm_global_timer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clocksource/arm_global_timer.c b/drivers/clocksource/arm_global_timer.c
index 36998fa..9df0d16 100644
--- a/drivers/clocksource/arm_global_timer.c
+++ b/drivers/clocksource/arm_global_timer.c
@@ -175,6 +175,7 @@ static int gt_clockevents_init(struct clock_event_device *clk)
 	clk->set_state_shutdown = gt_clockevent_shutdown;
 	clk->set_state_periodic = gt_clockevent_set_periodic;
 	clk->set_state_oneshot = gt_clockevent_shutdown;
+	clk->set_state_oneshot_stopped = gt_clockevent_shutdown;
 	clk->set_next_event = gt_clockevent_set_next_event;
 	clk->cpumask = cpumask_of(cpu);
 	clk->rating = 300;
-- 
1.9.1

  parent reply	other threads:[~2016-02-25 13:37 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <56CF00F6.9010301@linaro.org>
     [not found] ` <1456407438-6131-1-git-send-email-daniel.lezcano@linaro.org>
2016-02-25 13:37   ` [PATCH 2/9] clocksource/drivers/rockchip: Add err handle for rk_timer_init Daniel Lezcano
2016-02-25 13:37   ` [PATCH 3/9] clocksource/drivers/lpc32xx: Don't use the prescaler counter for clockevents Daniel Lezcano
2016-02-25 13:37   ` [PATCH 4/9] clocksource/drivers/lpc32xx: Support periodic mode Daniel Lezcano
2016-02-25 13:37   ` [PATCH 5/9] clocksource/drivers/lpc32xx: Support timer-based ARM delay Daniel Lezcano
2016-02-25 13:37   ` [PATCH 6/9] clocksource/drivers/arm_global_timer: Register delay timer Daniel Lezcano
2016-02-25 13:37   ` Daniel Lezcano [this message]
2016-02-26  9:43     ` [PATCH 8/9] clockevents/drivers/arm_global_timer: Implement ->set_state_oneshot_stopped() Jisheng Zhang
2016-02-25 13:37   ` [PATCH 9/9] clockevents/drivers/exynos_mct: " Daniel Lezcano

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