MIPS: jz4740: Migrate to new 'set-state' interface

Migrate jz4740 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.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: linux-mips@linux-mips.org
Cc: linaro-kernel@lists.linaro.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Patchwork: https://patchwork.linux-mips.org/patch/10601/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/jz4740/time.c

@@ -58,7 +58,7 @@ static irqreturn_t jz4740_clockevent_irq(int irq, void *devid)
 
 	jz4740_timer_ack_full(TIMER_CLOCKEVENT);
 
-	if (cd->mode != CLOCK_EVT_MODE_PERIODIC)
+	if (!clockevent_state_periodic(cd))
 		jz4740_timer_disable(TIMER_CLOCKEVENT);
 
 	cd->event_handler(cd);
@@ -66,24 +66,29 @@ static irqreturn_t jz4740_clockevent_irq(int irq, void *devid)
 	return IRQ_HANDLED;
 }
 
-static void jz4740_clockevent_set_mode(enum clock_event_mode mode,
-	struct clock_event_device *cd)
+static int jz4740_clockevent_set_periodic(struct clock_event_device *evt)
 {
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		jz4740_timer_set_count(TIMER_CLOCKEVENT, 0);
-		jz4740_timer_set_period(TIMER_CLOCKEVENT, jz4740_jiffies_per_tick);
-	case CLOCK_EVT_MODE_RESUME:
-		jz4740_timer_irq_full_enable(TIMER_CLOCKEVENT);
-		jz4740_timer_enable(TIMER_CLOCKEVENT);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		jz4740_timer_disable(TIMER_CLOCKEVENT);
-		break;
-	default:
-		break;
-	}
+	jz4740_timer_set_count(TIMER_CLOCKEVENT, 0);
+	jz4740_timer_set_period(TIMER_CLOCKEVENT, jz4740_jiffies_per_tick);
+	jz4740_timer_irq_full_enable(TIMER_CLOCKEVENT);
+	jz4740_timer_enable(TIMER_CLOCKEVENT);
+
+	return 0;
+}
+
+static int jz4740_clockevent_resume(struct clock_event_device *evt)
+{
+	jz4740_timer_irq_full_enable(TIMER_CLOCKEVENT);
+	jz4740_timer_enable(TIMER_CLOCKEVENT);
+
+	return 0;
+}
+
+static int jz4740_clockevent_shutdown(struct clock_event_device *evt)
+{
+	jz4740_timer_disable(TIMER_CLOCKEVENT);
+
+	return 0;
 }
 
 static int jz4740_clockevent_set_next(unsigned long evt,
@@ -100,7 +105,10 @@ static struct clock_event_device jz4740_clockevent = {
 	.name = "jz4740-timer",
 	.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
 	.set_next_event = jz4740_clockevent_set_next,
-	.set_mode = jz4740_clockevent_set_mode,
+	.set_state_shutdown = jz4740_clockevent_shutdown,
+	.set_state_periodic = jz4740_clockevent_set_periodic,
+	.set_state_oneshot = jz4740_clockevent_shutdown,
+	.tick_resume = jz4740_clockevent_resume,
 	.rating = 200,
 #ifdef CONFIG_MACH_JZ4740
 	.irq = JZ4740_IRQ_TCU0,