score/time: Migrate to new 'set-state' interface

Migrate score 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.

We weren't doing anything in ONESHOT/SHUTDOWN/RESUME modes and so
callbacks for them aren't implemented.

Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

arch/score/kernel/time.c

@@ -55,23 +55,12 @@ static int score_timer_set_next_event(unsigned long delta,
 	return 0;
 }
 
-static void score_timer_set_mode(enum clock_event_mode mode,
-		struct clock_event_device *evdev)
+static int score_timer_set_periodic(struct clock_event_device *evt)
 {
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
 	outl((TMR_M_PERIODIC | TMR_IE_ENABLE), P_TIMER0_CTRL);
-		outl(SYSTEM_CLOCK/HZ, P_TIMER0_PRELOAD);
+	outl(SYSTEM_CLOCK / HZ, P_TIMER0_PRELOAD);
 	outl(inl(P_TIMER0_CTRL) | TMR_ENABLE, P_TIMER0_CTRL);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	case CLOCK_EVT_MODE_RESUME:
-	case CLOCK_EVT_MODE_UNUSED:
-		break;
-	default:
-		BUG();
-	}
+	return 0;
 }
 
 static struct clock_event_device score_clockevent = {
@@ -79,7 +68,7 @@ static struct clock_event_device score_clockevent = {
 	.features		= CLOCK_EVT_FEAT_PERIODIC,
 	.shift			= 16,
 	.set_next_event		= score_timer_set_next_event,
-	.set_mode	= score_timer_set_mode,
+	.set_state_periodic	= score_timer_set_periodic,
 };
 
 void __init time_init(void)