clockevents/drivers/em_sti: Migrate to new 'set-state' interface
Migrate em_sti driver to the new 'set-state' interface provided by
the 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.
NOTE: This also drops a special check:
if (old_mode == CLOCK_EVT_MODE_ONESHOT)
em_sti_stop(p, USER_CLOCKEVENT);
as it doesn't look like that important. This driver only supports
ONESHOT and we can only move only to SHUTDOWN from ONESHOT and.
Also on second call (on shutdown), em_sti_stop() would return without
disabling the device again.
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c
index dc3c6ee..7a97a34 100644
--- a/drivers/clocksource/em_sti.c
+++ b/drivers/clocksource/em_sti.c
@@ -251,33 +251,21 @@
return container_of(ced, struct em_sti_priv, ced);
}
-static void em_sti_clock_event_mode(enum clock_event_mode mode,
- struct clock_event_device *ced)
+static int em_sti_clock_event_shutdown(struct clock_event_device *ced)
+{
+ struct em_sti_priv *p = ced_to_em_sti(ced);
+ em_sti_stop(p, USER_CLOCKEVENT);
+ return 0;
+}
+
+static int em_sti_clock_event_set_oneshot(struct clock_event_device *ced)
{
struct em_sti_priv *p = ced_to_em_sti(ced);
- /* deal with old setting first */
- switch (ced->mode) {
- case CLOCK_EVT_MODE_ONESHOT:
- em_sti_stop(p, USER_CLOCKEVENT);
- break;
- default:
- break;
- }
-
- switch (mode) {
- case CLOCK_EVT_MODE_ONESHOT:
- dev_info(&p->pdev->dev, "used for oneshot clock events\n");
- em_sti_start(p, USER_CLOCKEVENT);
- clockevents_config(&p->ced, p->rate);
- break;
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_UNUSED:
- em_sti_stop(p, USER_CLOCKEVENT);
- break;
- default:
- break;
- }
+ dev_info(&p->pdev->dev, "used for oneshot clock events\n");
+ em_sti_start(p, USER_CLOCKEVENT);
+ clockevents_config(&p->ced, p->rate);
+ return 0;
}
static int em_sti_clock_event_next(unsigned long delta,
@@ -303,11 +291,12 @@
ced->rating = 200;
ced->cpumask = cpu_possible_mask;
ced->set_next_event = em_sti_clock_event_next;
- ced->set_mode = em_sti_clock_event_mode;
+ ced->set_state_shutdown = em_sti_clock_event_shutdown;
+ ced->set_state_oneshot = em_sti_clock_event_set_oneshot;
dev_info(&p->pdev->dev, "used for clock events\n");
- /* Register with dummy 1 Hz value, gets updated in ->set_mode() */
+ /* Register with dummy 1 Hz value, gets updated in ->set_state_oneshot() */
clockevents_config_and_register(ced, 1, 2, 0xffffffff);
}