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

Migrate vf_pit 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: Jingchang Lu <b35083@freescale.com>
Cc: Stefan Agner <stefan@agner.ch>
Cc: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Stefan Agner <stefan@agner.ch>

1 files changed, 12 insertions, 15 deletions

diff --git a/drivers/clocksource/vf_pit_timer.c b/drivers/clocksource/vf_pit_timer.c
index b45ac6229b57..f07ba9932171 100644
--- a/drivers/clocksource/vf_pit_timer.c
+++ b/drivers/clocksource/vf_pit_timer.c
@@ -86,20 +86,16 @@ static int pit_set_next_event(unsigned long delta,
         return 0;
 }
 
-static void pit_set_mode(enum clock_event_mode mode,
-                                struct clock_event_device *evt)
+static int pit_shutdown(struct clock_event_device *evt)
 {
-        switch (mode) {
-        case CLOCK_EVT_MODE_PERIODIC:
-                pit_set_next_event(cycle_per_jiffy, evt);
-                break;
-        case CLOCK_EVT_MODE_SHUTDOWN:
-        case CLOCK_EVT_MODE_UNUSED:
-                pit_timer_disable();
-                break;
-        default:
-                break;
-        }
+        pit_timer_disable();
+        return 0;
+}
+
+static int pit_set_periodic(struct clock_event_device *evt)
+{
+        pit_set_next_event(cycle_per_jiffy, evt);
+        return 0;
 }
 
 static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
@@ -114,7 +110,7 @@ static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
          * and start the counter again. So software need to disable the timer
          * to stop the counter loop in ONESHOT mode.
          */
-        if (likely(evt->mode == CLOCK_EVT_MODE_ONESHOT))
+        if (likely(clockevent_state_oneshot(evt)))
                 pit_timer_disable();
 
         evt->event_handler(evt);
@@ -125,7 +121,8 @@ static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
 static struct clock_event_device clockevent_pit = {
         .name           = "VF pit timer",
         .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-        .set_mode       = pit_set_mode,
+        .set_state_shutdown = pit_shutdown,
+        .set_state_periodic = pit_set_periodic,
         .set_next_event = pit_set_next_event,
         .rating         = 300,
 };