MIPS: rt3352: Migrate to new 'set-state' interface

Migrate ralink 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: 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/10610/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/ralink/cevt-rt3352.c

@@ -36,8 +36,8 @@ struct systick_device {
 	int freq_scale;
 };
 
-static void systick_set_clock_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt);
+static int systick_set_oneshot(struct clock_event_device *evt);
+static int systick_shutdown(struct clock_event_device *evt);
 
 static int systick_next_event(unsigned long delta,
 				struct clock_event_device *evt)
@@ -76,7 +76,8 @@ static struct systick_device systick = {
 		.rating			= 310,
 		.features		= CLOCK_EVT_FEAT_ONESHOT,
 		.set_next_event		= systick_next_event,
-		.set_mode	= systick_set_clock_mode,
+		.set_state_shutdown	= systick_shutdown,
+		.set_state_oneshot	= systick_set_oneshot,
 		.event_handler		= systick_event_handler,
 	},
 };
@@ -87,33 +88,33 @@ static struct irqaction systick_irqaction = {
 	.dev_id = &systick.dev,
 };
 
-static void systick_set_clock_mode(enum clock_event_mode mode,
-				struct clock_event_device *evt)
+static int systick_shutdown(struct clock_event_device *evt)
+{
+	struct systick_device *sdev;
+
+	sdev = container_of(evt, struct systick_device, dev);
+
+	if (sdev->irq_requested)
+		free_irq(systick.dev.irq, &systick_irqaction);
+	sdev->irq_requested = 0;
+	iowrite32(0, systick.membase + SYSTICK_CONFIG);
+
+	return 0;
+}
+
+static int systick_set_oneshot(struct clock_event_device *evt)
 {
 	struct systick_device *sdev;
 
 	sdev = container_of(evt, struct systick_device, dev);
 
-	switch (mode) {
-	case CLOCK_EVT_MODE_ONESHOT:
 	if (!sdev->irq_requested)
 		setup_irq(systick.dev.irq, &systick_irqaction);
 	sdev->irq_requested = 1;
 	iowrite32(CFG_EXT_STK_EN | CFG_CNT_EN,
 		  systick.membase + SYSTICK_CONFIG);
-		break;
-
-	case CLOCK_EVT_MODE_SHUTDOWN:
-		if (sdev->irq_requested)
-			free_irq(systick.dev.irq, &systick_irqaction);
-		sdev->irq_requested = 0;
-		iowrite32(0, systick.membase + SYSTICK_CONFIG);
-		break;
 
-	default:
-		pr_err("%s: Unhandeled mips clock_mode\n", systick.dev.name);
-		break;
-	}
+	return 0;
 }
 
 static void __init ralink_systick_init(struct device_node *np)