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Groups > linux.kernel > #1343168

[PATCH 8/9] clockevents/drivers/arm_global_timer: Implement ->set_state_oneshot_stopped()

From Daniel Lezcano <daniel.lezcano@linaro.org>
Newsgroups linux.kernel
Subject [PATCH 8/9] clockevents/drivers/arm_global_timer: Implement ->set_state_oneshot_stopped()
Date 2016-02-25 14:40 +0100
Message-ID <r64j9-4qI-41@gated-at.bofh.it> (permalink)
References <r649s-4mJ-13@gated-at.bofh.it> <r64j8-4qI-15@gated-at.bofh.it>
Organization linux.* mail to news gateway

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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

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Thread

[PULL] : clockevents for 4.6 Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:30 +0100
  [PATCH 3/9] clocksource/drivers/lpc32xx: Don't use the prescaler counter for clockevents Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
  [PATCH 5/9] clocksource/drivers/lpc32xx: Support timer-based ARM delay Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
  [PATCH 9/9] clockevents/drivers/exynos_mct: Implement ->set_state_oneshot_stopped() Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
  [PATCH 2/9] clocksource/drivers/rockchip: Add err handle for rk_timer_init Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
  [PATCH 1/9] clocksource/drivers/arm_arch_timer: Enable and verify MMIO access Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
    [PATCH 8/9] clockevents/drivers/arm_global_timer: Implement ->set_state_oneshot_stopped() Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
      Re: [PATCH 8/9] clockevents/drivers/arm_global_timer: Implement  ->set_state_oneshot_stopped() Jisheng Zhang <jszhang@marvell.com> - 2016-02-26 10:50 +0100
    [PATCH 7/9] clockevents/drivers/arm_arch_timer: Implement ->set_state_oneshot_stopped() Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
    [PATCH 6/9] clocksource/drivers/arm_global_timer: Register delay timer Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100
    [PATCH 4/9] clocksource/drivers/lpc32xx: Support periodic mode Daniel Lezcano <daniel.lezcano@linaro.org> - 2016-02-25 14:40 +0100

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