clockevents/drivers/tegra20: Migrate to new 'set-state' interface

Migrate tegra20 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: Thierry Reding <treding@nvidia.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c
index 5a112d72fc2d2ec43205f5cde5720431bdc89b54..6ebda1177e791373e6db749f10620ef785bf198d 100644 (file)
--- a/drivers/clocksource/tegra20_timer.c
+++ b/drivers/clocksource/tegra20_timer.c
@@ -72,33 +72,36 @@ static int tegra_timer_set_next_event(unsigned long cycles,
        return 0;
 }
 
-static void tegra_timer_set_mode(enum clock_event_mode mode,
-                                   struct clock_event_device *evt)
+static inline void timer_shutdown(struct clock_event_device *evt)
 {
-       u32 reg;
-
        timer_writel(0, TIMER3_BASE + TIMER_PTV);
+}
 
-       switch (mode) {
-       case CLOCK_EVT_MODE_PERIODIC:
-               reg = 0xC0000000 | ((1000000/HZ)-1);
-               timer_writel(reg, TIMER3_BASE + TIMER_PTV);
-               break;
-       case CLOCK_EVT_MODE_ONESHOT:
-               break;
-       case CLOCK_EVT_MODE_UNUSED:
-       case CLOCK_EVT_MODE_SHUTDOWN:
-       case CLOCK_EVT_MODE_RESUME:
-               break;
-       }
+static int tegra_timer_shutdown(struct clock_event_device *evt)
+{
+       timer_shutdown(evt);
+       return 0;
+}
+
+static int tegra_timer_set_periodic(struct clock_event_device *evt)
+{
+       u32 reg = 0xC0000000 | ((1000000 / HZ) - 1);
+
+       timer_shutdown(evt);
+       timer_writel(reg, TIMER3_BASE + TIMER_PTV);
+       return 0;
 }
 
 static struct clock_event_device tegra_clockevent = {
-       .name           = "timer0",
-       .rating         = 300,
-       .features       = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
-       .set_next_event = tegra_timer_set_next_event,
-       .set_mode       = tegra_timer_set_mode,
+       .name                   = "timer0",
+       .rating                 = 300,
+       .features               = CLOCK_EVT_FEAT_ONESHOT |
+                                 CLOCK_EVT_FEAT_PERIODIC,
+       .set_next_event         = tegra_timer_set_next_event,
+       .set_state_shutdown     = tegra_timer_shutdown,
+       .set_state_periodic     = tegra_timer_set_periodic,
+       .set_state_oneshot      = tegra_timer_shutdown,
+       .tick_resume            = tegra_timer_shutdown,
 };
 
 static u64 notrace tegra_read_sched_clock(void)