clockevents/drivers/efm32: Migrate to new 'set-state' interface

Migrate efm32 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.

There is nothing to be done for resume state and so isn't implemented.

Cc: Uwe Kleine-König <kernel@pengutronix.de>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>

diff --git a/drivers/clocksource/time-efm32.c b/drivers/clocksource/time-efm32.c
index 5b6e3d5644c9519f12468369f6a25c9ab4946ff4..b06e4c2be4068f540700e515e0e657522517f3c3 100644 (file)
--- a/drivers/clocksource/time-efm32.c
+++ b/drivers/clocksource/time-efm32.c
@@ -48,40 +48,42 @@ struct efm32_clock_event_ddata {
        unsigned periodic_top;
 };
 
-static void efm32_clock_event_set_mode(enum clock_event_mode mode,
-                                      struct clock_event_device *evtdev)
+static int efm32_clock_event_shutdown(struct clock_event_device *evtdev)
 {
        struct efm32_clock_event_ddata *ddata =
                container_of(evtdev, struct efm32_clock_event_ddata, evtdev);
 
-       switch (mode) {
-       case CLOCK_EVT_MODE_PERIODIC:
-               writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
-               writel_relaxed(ddata->periodic_top, ddata->base + TIMERn_TOP);
-               writel_relaxed(TIMERn_CTRL_PRESC_1024 |
-                              TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |
-                              TIMERn_CTRL_MODE_DOWN,
-                              ddata->base + TIMERn_CTRL);
-               writel_relaxed(TIMERn_CMD_START, ddata->base + TIMERn_CMD);
-               break;
-
-       case CLOCK_EVT_MODE_ONESHOT:
-               writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
-               writel_relaxed(TIMERn_CTRL_PRESC_1024 |
-                              TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |
-                              TIMERn_CTRL_OSMEN |
-                              TIMERn_CTRL_MODE_DOWN,
-                              ddata->base + TIMERn_CTRL);
-               break;
-
-       case CLOCK_EVT_MODE_UNUSED:
-       case CLOCK_EVT_MODE_SHUTDOWN:
-               writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
-               break;
-
-       case CLOCK_EVT_MODE_RESUME:
-               break;
-       }
+       writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
+       return 0;
+}
+
+static int efm32_clock_event_set_oneshot(struct clock_event_device *evtdev)
+{
+       struct efm32_clock_event_ddata *ddata =
+               container_of(evtdev, struct efm32_clock_event_ddata, evtdev);
+
+       writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
+       writel_relaxed(TIMERn_CTRL_PRESC_1024 |
+                      TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |
+                      TIMERn_CTRL_OSMEN |
+                      TIMERn_CTRL_MODE_DOWN,
+                      ddata->base + TIMERn_CTRL);
+       return 0;
+}
+
+static int efm32_clock_event_set_periodic(struct clock_event_device *evtdev)
+{
+       struct efm32_clock_event_ddata *ddata =
+               container_of(evtdev, struct efm32_clock_event_ddata, evtdev);
+
+       writel_relaxed(TIMERn_CMD_STOP, ddata->base + TIMERn_CMD);
+       writel_relaxed(ddata->periodic_top, ddata->base + TIMERn_TOP);
+       writel_relaxed(TIMERn_CTRL_PRESC_1024 |
+                      TIMERn_CTRL_CLKSEL_PRESCHFPERCLK |
+                      TIMERn_CTRL_MODE_DOWN,
+                      ddata->base + TIMERn_CTRL);
+       writel_relaxed(TIMERn_CMD_START, ddata->base + TIMERn_CMD);
+       return 0;
 }
 
 static int efm32_clock_event_set_next_event(unsigned long evt,
@@ -112,7 +114,9 @@ static struct efm32_clock_event_ddata clock_event_ddata = {
        .evtdev = {
                .name = "efm32 clockevent",
                .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC,
-               .set_mode = efm32_clock_event_set_mode,
+               .set_state_shutdown = efm32_clock_event_shutdown,
+               .set_state_periodic = efm32_clock_event_set_periodic,
+               .set_state_oneshot = efm32_clock_event_set_oneshot,
                .set_next_event = efm32_clock_event_set_next_event,
                .rating = 200,
        },