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

Migrate sh_tmu 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: Magnus Damm <damm+renesas@opensource.se>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

drivers/clocksource/sh_tmu.c

@@ -240,7 +240,7 @@ static irqreturn_t sh_tmu_interrupt(int irq, void *dev_id)
 	struct sh_tmu_channel *ch = dev_id;
 
 	/* disable or acknowledge interrupt */
-	if (ch->ced.mode == CLOCK_EVT_MODE_ONESHOT)
+	if (clockevent_state_oneshot(&ch->ced))
 		sh_tmu_write(ch, TCR, TCR_TPSC_CLK4);
 	else
 		sh_tmu_write(ch, TCR, TCR_UNIE | TCR_TPSC_CLK4);
@@ -358,42 +358,37 @@ static void sh_tmu_clock_event_start(struct sh_tmu_channel *ch, int periodic)
 	}
 }
 
-static void sh_tmu_clock_event_mode(enum clock_event_mode mode,
-				    struct clock_event_device *ced)
+static int sh_tmu_clock_event_shutdown(struct clock_event_device *ced)
 {
 	struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
-	int disabled = 0;
 
-	/* deal with old setting first */
-	switch (ced->mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-	case CLOCK_EVT_MODE_ONESHOT:
 	sh_tmu_disable(ch);
-		disabled = 1;
-		break;
-	default:
-		break;
-	}
+	return 0;
+}
 
-	switch (mode) {
-	case CLOCK_EVT_MODE_PERIODIC:
-		dev_info(&ch->tmu->pdev->dev,
-			 "ch%u: used for periodic clock events\n", ch->index);
-		sh_tmu_clock_event_start(ch, 1);
-		break;
-	case CLOCK_EVT_MODE_ONESHOT:
-		dev_info(&ch->tmu->pdev->dev,
-			 "ch%u: used for oneshot clock events\n", ch->index);
-		sh_tmu_clock_event_start(ch, 0);
-		break;
-	case CLOCK_EVT_MODE_UNUSED:
-		if (!disabled)
+static int sh_tmu_clock_event_set_state(struct clock_event_device *ced,
+					int periodic)
+{
+	struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
+
+	/* deal with old setting first */
+	if (clockevent_state_oneshot(ced) || clockevent_state_periodic(ced))
 		sh_tmu_disable(ch);
-		break;
-	case CLOCK_EVT_MODE_SHUTDOWN:
-	default:
-		break;
-	}
+
+	dev_info(&ch->tmu->pdev->dev, "ch%u: used for %s clock events\n",
+		 ch->index, periodic ? "periodic" : "oneshot");
+	sh_tmu_clock_event_start(ch, periodic);
+	return 0;
+}
+
+static int sh_tmu_clock_event_set_oneshot(struct clock_event_device *ced)
+{
+	return sh_tmu_clock_event_set_state(ced, 0);
+}
+
+static int sh_tmu_clock_event_set_periodic(struct clock_event_device *ced)
+{
+	return sh_tmu_clock_event_set_state(ced, 1);
 }
 
 static int sh_tmu_clock_event_next(unsigned long delta,
@@ -401,7 +396,7 @@ static int sh_tmu_clock_event_next(unsigned long delta,
 {
 	struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
 
-	BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT);
+	BUG_ON(!clockevent_state_oneshot(ced));
 
 	/* program new delta value */
 	sh_tmu_set_next(ch, delta, 0);
@@ -430,7 +425,9 @@ static void sh_tmu_register_clockevent(struct sh_tmu_channel *ch,
 	ced->rating = 200;
 	ced->cpumask = cpu_possible_mask;
 	ced->set_next_event = sh_tmu_clock_event_next;
-	ced->set_mode = sh_tmu_clock_event_mode;
+	ced->set_state_shutdown = sh_tmu_clock_event_shutdown;
+	ced->set_state_periodic = sh_tmu_clock_event_set_periodic;
+	ced->set_state_oneshot = sh_tmu_clock_event_set_oneshot;
 	ced->suspend = sh_tmu_clock_event_suspend;
 	ced->resume = sh_tmu_clock_event_resume;