clockevents/drivers/stm32: Migrate to new 'set-state' interface

Migrate stm32 driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Acked-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

1 files changed, 17 insertions, 13 deletions

diff --git a/drivers/clocksource/timer-stm32.c b/drivers/clocksource/timer-stm32.c
index a97e8b50701c..f3dcb76799b4 100644
--- a/drivers/clocksource/timer-stm32.c
+++ b/drivers/clocksource/timer-stm32.c
@@ -40,24 +40,25 @@ struct stm32_clock_event_ddata {
         void __iomem *base;
 };
 
-static void stm32_clock_event_set_mode(enum clock_event_mode mode,
-                                       struct clock_event_device *evtdev)
+static int stm32_clock_event_shutdown(struct clock_event_device *evtdev)
 {
         struct stm32_clock_event_ddata *data =
                 container_of(evtdev, struct stm32_clock_event_ddata, evtdev);
         void *base = data->base;
 
-        switch (mode) {
-        case CLOCK_EVT_MODE_PERIODIC:
-                writel_relaxed(data->periodic_top, base + TIM_ARR);
-                writel_relaxed(TIM_CR1_ARPE | TIM_CR1_CEN, base + TIM_CR1);
-                break;
+        writel_relaxed(0, base + TIM_CR1);
+        return 0;
+}
 
-        case CLOCK_EVT_MODE_ONESHOT:
-        default:
-                writel_relaxed(0, base + TIM_CR1);
-                break;
-        }
+static int stm32_clock_event_set_periodic(struct clock_event_device *evtdev)
+{
+        struct stm32_clock_event_ddata *data =
+                container_of(evtdev, struct stm32_clock_event_ddata, evtdev);
+        void *base = data->base;
+
+        writel_relaxed(data->periodic_top, base + TIM_ARR);
+        writel_relaxed(TIM_CR1_ARPE | TIM_CR1_CEN, base + TIM_CR1);
+        return 0;
 }
 
 static int stm32_clock_event_set_next_event(unsigned long evt,
@@ -88,7 +89,10 @@ static struct stm32_clock_event_ddata clock_event_ddata = {
         .evtdev = {
                 .name = "stm32 clockevent",
                 .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
-                .set_mode = stm32_clock_event_set_mode,
+                .set_state_shutdown = stm32_clock_event_shutdown,
+                .set_state_periodic = stm32_clock_event_set_periodic,
+                .set_state_oneshot = stm32_clock_event_shutdown,
+                .tick_resume = stm32_clock_event_shutdown,
                 .set_next_event = stm32_clock_event_set_next_event,
                 .rating = 200,
         },