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Subject[tip: timers/urgent] clocksource/drivers/timer-gx6605s: Fixup counter reload
The following commit has been merged into the timers/urgent branch of tip:

Commit-ID: bc6717d55d07110d8f3c6d31ec2af50c11b07091
Gitweb: https://git.kernel.org/tip/bc6717d55d07110d8f3c6d31ec2af50c11b07091
Author: Guo Ren <guoren@linux.alibaba.com>
AuthorDate: Tue, 18 Aug 2020 07:31:17
Committer: Daniel Lezcano <daniel.lezcano@linaro.org>
CommitterDate: Mon, 24 Aug 2020 13:01:39 +02:00

clocksource/drivers/timer-gx6605s: Fixup counter reload

When the timer counts to the upper limit, an overflow interrupt is
generated, and the count is reset with the value in the TIME_INI
register. But the software expects to start counting from 0 when
the count overflows, so it forces TIME_INI to 0 to solve the
potential interrupt storm problem.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Tested-by: Xu Kai <xukai@nationalchip.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/1597735877-71115-1-git-send-email-guoren@kernel.org
---
drivers/clocksource/timer-gx6605s.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/clocksource/timer-gx6605s.c b/drivers/clocksource/timer-gx6605s.c
index 80d0939..8d386ad 100644
--- a/drivers/clocksource/timer-gx6605s.c
+++ b/drivers/clocksource/timer-gx6605s.c
@@ -28,6 +28,7 @@ static irqreturn_t gx6605s_timer_interrupt(int irq, void *dev)
void __iomem *base = timer_of_base(to_timer_of(ce));

writel_relaxed(GX6605S_STATUS_CLR, base + TIMER_STATUS);
+ writel_relaxed(0, base + TIMER_INI);

ce->event_handler(ce);

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