[PATCH 1/3] clocksource/drivers/timer-riscv: Add set_state_oneshot_stopped

From: Jisheng Zhang
Date: Wed Mar 27 2024 - 11:49:47 EST


To avoid spurious timer interrupts when KTIME_MAX is used, we need to
configure set_state_oneshot_stopped(). Although implementing this is
optional, it still affects things like power management for the extra
timer interrupt.

Check commit 8fff52fd5093 ("clockevents: Introduce
CLOCK_EVT_STATE_ONESHOT_STOPPED state") for more information.

Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
---
drivers/clocksource/timer-riscv.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index 48ce50c5f5e6..e661fc037337 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -69,11 +69,12 @@ static int riscv_clock_shutdown(struct clock_event_device *evt)

static unsigned int riscv_clock_event_irq;
static DEFINE_PER_CPU(struct clock_event_device, riscv_clock_event) = {
- .name = "riscv_timer_clockevent",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .rating = 100,
- .set_next_event = riscv_clock_next_event,
- .set_state_shutdown = riscv_clock_shutdown,
+ .name = "riscv_timer_clockevent",
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .rating = 100,
+ .set_next_event = riscv_clock_next_event,
+ .set_state_shutdown = riscv_clock_shutdown,
+ .set_state_oneshot_stopped = riscv_clock_shutdown,
};

/*
--
2.43.0