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x86/uv/time: Migrate to new set-state interface 

Migrate uv 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.

We weren't doing anything while switching modes other than in shutdown
mode and so those are not implemented.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: linaro-kernel@lists.linaro.org
Cc: Christoph Lameter <cl@linux.com>
Cc: Tejun Heo <tj@kernel.org>
Link: http://lkml.kernel.org/r/52e04139746222a2e82a96d13953cbc306cfb59b.1437042675.git.viresh.kumar@linaro.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Viresh Kumar 2015-07-16 16:28:47 +05:30 committed by Thomas Gleixner
parent c2e13cc2ce
commit ca53d434f7
1 changed files with 13 additions and 24 deletions
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37
arch/x86/platform/uv/uv_time.c
View File

@ -32,8 +32,7 @@
static cycle_t uv_read_rtc(struct clocksource *cs);
static int uv_rtc_next_event(unsigned long, struct clock_event_device *);
static void uv_rtc_timer_setup(enum clock_event_mode,
struct clock_event_device *);
static int uv_rtc_shutdown(struct clock_event_device *evt);
static struct clocksource clocksource_uv = {
.name = RTC_NAME,
@ -44,14 +43,14 @@ static struct clocksource clocksource_uv = {
};
static struct clock_event_device clock_event_device_uv = {
.name = RTC_NAME,
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 20,
.rating = 400,
.irq = -1,
.set_next_event = uv_rtc_next_event,
.set_mode = uv_rtc_timer_setup,
.event_handler = NULL,
.name = RTC_NAME,
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 20,
.rating = 400,
.irq = -1,
.set_next_event = uv_rtc_next_event,
.set_state_shutdown = uv_rtc_shutdown,
.event_handler = NULL,
};
static DEFINE_PER_CPU(struct clock_event_device, cpu_ced);
@ -321,24 +320,14 @@ static int uv_rtc_next_event(unsigned long delta,
}
/*
* Setup the RTC timer in oneshot mode
* Shutdown the RTC timer
*/
static void uv_rtc_timer_setup(enum clock_event_mode mode,
struct clock_event_device *evt)
static int uv_rtc_shutdown(struct clock_event_device *evt)
{
int ced_cpu = cpumask_first(evt->cpumask);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_RESUME:
/* Nothing to do here yet */
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
uv_rtc_unset_timer(ced_cpu, 1);
break;
}
uv_rtc_unset_timer(ced_cpu, 1);
return 0;
}
static void uv_rtc_interrupt(void)