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

Migrate arc 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: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

diff --git a/arch/arc/kernel/time.c b/arch/arc/kernel/time.c
index 3364d2b..4294761 100644 (file)
--- a/arch/arc/kernel/time.c
+++ b/arch/arc/kernel/time.c
@@ -203,34 +203,24 @@ static int arc_clkevent_set_next_event(unsigned long delta,
        return 0;
 }
 
-static void arc_clkevent_set_mode(enum clock_event_mode mode,
-                                 struct clock_event_device *dev)
+static int arc_clkevent_set_periodic(struct clock_event_device *dev)
 {
-       switch (mode) {
-       case CLOCK_EVT_MODE_PERIODIC:
-                /*
-                 * At X Hz, 1 sec = 1000ms -> X cycles;
-                 *                    10ms -> X / 100 cycles
-                 */
-               arc_timer_event_setup(arc_get_core_freq() / HZ);
-               break;
-       case CLOCK_EVT_MODE_ONESHOT:
-               break;
-       default:
-               break;
-       }
-
-       return;
+       /*
+        * At X Hz, 1 sec = 1000ms -> X cycles;
+        *                    10ms -> X / 100 cycles
+        */
+       arc_timer_event_setup(arc_get_core_freq() / HZ);
+       return 0;
 }
 
 static DEFINE_PER_CPU(struct clock_event_device, arc_clockevent_device) = {
-       .name           = "ARC Timer0",
-       .features       = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
-       .mode           = CLOCK_EVT_MODE_UNUSED,
-       .rating         = 300,
-       .irq            = TIMER0_IRQ,   /* hardwired, no need for resources */
-       .set_next_event = arc_clkevent_set_next_event,
-       .set_mode       = arc_clkevent_set_mode,
+       .name                   = "ARC Timer0",
+       .features               = CLOCK_EVT_FEAT_ONESHOT |
+                                 CLOCK_EVT_FEAT_PERIODIC,
+       .rating                 = 300,
+       .irq                    = TIMER0_IRQ,   /* hardwired, no need for resources */
+       .set_next_event         = arc_clkevent_set_next_event,
+       .set_state_periodic     = arc_clkevent_set_periodic,
 };
 
 static irqreturn_t timer_irq_handler(int irq, void *dev_id)
@@ -240,7 +230,7 @@ static irqreturn_t timer_irq_handler(int irq, void *dev_id)
         * irq_set_chip_and_handler() asked for handle_percpu_devid_irq()
         */
        struct clock_event_device *evt = this_cpu_ptr(&arc_clockevent_device);
-       int irq_reenable = evt->mode == CLOCK_EVT_MODE_PERIODIC;
+       int irq_reenable = clockevent_state_periodic(evt);
 
        /*
         * Any write to CTRL reg ACks the interrupt, we rewrite the