clockevents/drivers/asm9260: Migrate to new 'set-state' interface

Migrate asm9260 driver to the new 'set-state' interface provided by
clockevents core, the earlier 'set-mode' interface is marked obsolete
now.

As a default the timer was stopped when entering in the set_mode(RESUME)
function, now this is done explicitly with the new API.

This also enables us to implement callbacks for new states of clockevent
devices, for example: ONESHOT_STOPPED.

Cc: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

1 files changed, 39 insertions, 25 deletions

diff --git a/drivers/clocksource/asm9260_timer.c b/drivers/clocksource/asm9260_timer.c
index 4c2ba59897e8..217438d39eb3 100644
--- a/drivers/clocksource/asm9260_timer.c
+++ b/drivers/clocksource/asm9260_timer.c
@@ -120,38 +120,52 @@ static int asm9260_timer_set_next_event(unsigned long delta,
         return 0;
 }
 
-static void asm9260_timer_set_mode(enum clock_event_mode mode,
-                                    struct clock_event_device *evt)
+static inline void __asm9260_timer_shutdown(struct clock_event_device *evt)
 {
         /* stop timer0 */
         writel_relaxed(BM_C0_EN, priv.base + HW_TCR + CLR_REG);
+}
+
+static int asm9260_timer_shutdown(struct clock_event_device *evt)
+{
+        __asm9260_timer_shutdown(evt);
+        return 0;
+}
+
+static int asm9260_timer_set_oneshot(struct clock_event_device *evt)
+{
+        __asm9260_timer_shutdown(evt);
+
+        /* enable reset and stop on match */
+        writel_relaxed(BM_MCR_RES_EN(0) | BM_MCR_STOP_EN(0),
+                       priv.base + HW_MCR + SET_REG);
+        return 0;
+}
+
+static int asm9260_timer_set_periodic(struct clock_event_device *evt)
+{
+        __asm9260_timer_shutdown(evt);
 
-        switch (mode) {
-        case CLOCK_EVT_MODE_PERIODIC:
-                /* disable reset and stop on match */
-                writel_relaxed(BM_MCR_RES_EN(0) | BM_MCR_STOP_EN(0),
-                                priv.base + HW_MCR + CLR_REG);
-                /* configure match count for TC0 */
-                writel_relaxed(priv.ticks_per_jiffy, priv.base + HW_MR0);
-                /* enable TC0 */
-                writel_relaxed(BM_C0_EN, priv.base + HW_TCR + SET_REG);
-                break;
-        case CLOCK_EVT_MODE_ONESHOT:
-                /* enable reset and stop on match */
-                writel_relaxed(BM_MCR_RES_EN(0) | BM_MCR_STOP_EN(0),
-                                priv.base + HW_MCR + SET_REG);
-                break;
-        default:
-                break;
-        }
+        /* disable reset and stop on match */
+        writel_relaxed(BM_MCR_RES_EN(0) | BM_MCR_STOP_EN(0),
+                       priv.base + HW_MCR + CLR_REG);
+        /* configure match count for TC0 */
+        writel_relaxed(priv.ticks_per_jiffy, priv.base + HW_MR0);
+        /* enable TC0 */
+        writel_relaxed(BM_C0_EN, priv.base + HW_TCR + SET_REG);
+        return 0;
 }
 
 static struct clock_event_device event_dev = {
-        .name           = DRIVER_NAME,
-        .rating         = 200,
-        .features       = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
-        .set_next_event = asm9260_timer_set_next_event,
-        .set_mode       = asm9260_timer_set_mode,
+        .name                   = DRIVER_NAME,
+        .rating                 = 200,
+        .features               = CLOCK_EVT_FEAT_PERIODIC |
+                                  CLOCK_EVT_FEAT_ONESHOT,
+        .set_next_event         = asm9260_timer_set_next_event,
+        .set_state_shutdown     = asm9260_timer_shutdown,
+        .set_state_periodic     = asm9260_timer_set_periodic,
+        .set_state_oneshot      = asm9260_timer_set_oneshot,
+        .tick_resume            = asm9260_timer_shutdown,
 };
 
 static irqreturn_t asm9260_timer_interrupt(int irq, void *dev_id)