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

Migrate pxa 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.

Both oneshot and shutdown modes had exactly same code and so only a
single callback is sufficient now, which will be called for both the
modes.

Cc: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: Russell King <linux@arm.linux.org.uk>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NRobert Jarzmik <robert.jarzmik@free.fr>

drivers/clocksource/pxa_timer.c

@@ -88,26 +88,12 @@ pxa_osmr0_set_next_event(unsigned long delta, struct clock_event_device *dev)
 	return (signed)(next - oscr) <= MIN_OSCR_DELTA ? -ETIME : 0;
 }
 
-static void
-pxa_osmr0_set_mode(enum clock_event_mode mode, struct clock_event_device *dev)
+static int pxa_osmr0_shutdown(struct clock_event_device *evt)
 {
-	switch (mode) {
-	case CLOCK_EVT_MODE_ONESHOT:
-		timer_writel(timer_readl(OIER) & ~OIER_E0, OIER);
-		timer_writel(OSSR_M0, OSSR);
-		break;
-
-	case CLOCK_EVT_MODE_UNUSED:
-	case CLOCK_EVT_MODE_SHUTDOWN:
 	/* initializing, released, or preparing for suspend */
 	timer_writel(timer_readl(OIER) & ~OIER_E0, OIER);
 	timer_writel(OSSR_M0, OSSR);
-		break;
-
-	case CLOCK_EVT_MODE_RESUME:
-	case CLOCK_EVT_MODE_PERIODIC:
-		break;
-	}
+	return 0;
 }
 
 #ifdef CONFIG_PM
@@ -151,7 +137,8 @@ static struct clock_event_device ckevt_pxa_osmr0 = {
 	.features		= CLOCK_EVT_FEAT_ONESHOT,
 	.rating			= 200,
 	.set_next_event		= pxa_osmr0_set_next_event,
-	.set_mode	= pxa_osmr0_set_mode,
+	.set_state_shutdown	= pxa_osmr0_shutdown,
+	.set_state_oneshot	= pxa_osmr0_shutdown,
 	.suspend		= pxa_timer_suspend,
 	.resume			= pxa_timer_resume,
 };