clocksource/drivers/timer-microchip-pit64b: Remove suspend/resume ops for ce

Remove suspend and resume ops for clockevent and add set_state_oneshot()
instead. Along with this mchp_pit64b_{suspend, resume}() were called on
proper function to disable/enable clocks. This will allow disabling clocks
for clockevent in case it is not selected as active clockevent.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20220609094041.1796372-2-claudiu.beznea@microchip.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/clocksource/timer-microchip-pit64b.c b/drivers/clocksource/timer-microchip-pit64b.c
index abce83d2f00bd23b4363ee08755dc3ddcb7ae7a7..b51259395ac38d2ab04da95cae044f8596638f3f 100644 (file)
--- a/drivers/clocksource/timer-microchip-pit64b.c
+++ b/drivers/clocksource/timer-microchip-pit64b.c
@@ -173,7 +173,8 @@ static int mchp_pit64b_clkevt_shutdown(struct clock_event_device *cedev)
 {
        struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
 
-       writel_relaxed(MCHP_PIT64B_CR_SWRST, timer->base + MCHP_PIT64B_CR);
+       if (!clockevent_state_detached(cedev))
+               mchp_pit64b_suspend(timer);
 
        return 0;
 }
@@ -182,35 +183,37 @@ static int mchp_pit64b_clkevt_set_periodic(struct clock_event_device *cedev)
 {
        struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
 
+       if (clockevent_state_shutdown(cedev))
+               mchp_pit64b_resume(timer);
+
        mchp_pit64b_reset(timer, mchp_pit64b_ce_cycles, MCHP_PIT64B_MR_CONT,
                          MCHP_PIT64B_IER_PERIOD);
 
        return 0;
 }
 
-static int mchp_pit64b_clkevt_set_next_event(unsigned long evt,
-                                            struct clock_event_device *cedev)
+static int mchp_pit64b_clkevt_set_oneshot(struct clock_event_device *cedev)
 {
        struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
 
-       mchp_pit64b_reset(timer, evt, MCHP_PIT64B_MR_ONE_SHOT,
+       if (clockevent_state_shutdown(cedev))
+               mchp_pit64b_resume(timer);
+
+       mchp_pit64b_reset(timer, mchp_pit64b_ce_cycles, MCHP_PIT64B_MR_ONE_SHOT,
                          MCHP_PIT64B_IER_PERIOD);
 
        return 0;
 }
 
-static void mchp_pit64b_clkevt_suspend(struct clock_event_device *cedev)
+static int mchp_pit64b_clkevt_set_next_event(unsigned long evt,
+                                            struct clock_event_device *cedev)
 {
        struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
 
-       mchp_pit64b_suspend(timer);
-}
-
-static void mchp_pit64b_clkevt_resume(struct clock_event_device *cedev)
-{
-       struct mchp_pit64b_timer *timer = clkevt_to_mchp_pit64b_timer(cedev);
+       mchp_pit64b_reset(timer, evt, MCHP_PIT64B_MR_ONE_SHOT,
+                         MCHP_PIT64B_IER_PERIOD);
 
-       mchp_pit64b_resume(timer);
+       return 0;
 }
 
 static irqreturn_t mchp_pit64b_interrupt(int irq, void *dev_id)
@@ -395,9 +398,8 @@ static int __init mchp_pit64b_init_clkevt(struct mchp_pit64b_timer *timer,
        ce->clkevt.rating = 150;
        ce->clkevt.set_state_shutdown = mchp_pit64b_clkevt_shutdown;
        ce->clkevt.set_state_periodic = mchp_pit64b_clkevt_set_periodic;
+       ce->clkevt.set_state_oneshot = mchp_pit64b_clkevt_set_oneshot;
        ce->clkevt.set_next_event = mchp_pit64b_clkevt_set_next_event;
-       ce->clkevt.suspend = mchp_pit64b_clkevt_suspend;
-       ce->clkevt.resume = mchp_pit64b_clkevt_resume;
        ce->clkevt.cpumask = cpumask_of(0);
        ce->clkevt.irq = irq;