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nios2/time: Migrate to new 'set-state' interface 

Migrate nios2 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: Ley Foon Tan <lftan@altera.com>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Dmitry Torokhov <dtor@chromium.org>
Cc: nios2-dev@lists.rocketboards.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Ley Foon Tan <lftan@altera.com>
This commit is contained in:
Viresh Kumar 2015-08-18 13:59:28 +08:00 committed by Ley Foon Tan
parent 64291f7db5
commit 549a14c14b
1 changed files with 29 additions and 20 deletions
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45
arch/nios2/kernel/time.c
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@ -130,7 +130,7 @@ static void nios2_timer_stop(struct nios2_timer *timer)
}
static void nios2_timer_config(struct nios2_timer *timer, unsigned long period,
enum clock_event_mode mode)
bool periodic)
{
u16 ctrl;
@ -148,7 +148,7 @@ static void nios2_timer_config(struct nios2_timer *timer, unsigned long period,
timer_writew(timer, period >> 16, ALTERA_TIMER_PERIODH_REG);
ctrl |= ALTERA_TIMER_CONTROL_START_MSK | ALTERA_TIMER_CONTROL_ITO_MSK;
if (mode == CLOCK_EVT_MODE_PERIODIC)
if (periodic)
ctrl |= ALTERA_TIMER_CONTROL_CONT_MSK;
else
ctrl &= ~ALTERA_TIMER_CONTROL_CONT_MSK;
@ -160,32 +160,38 @@ static int nios2_timer_set_next_event(unsigned long delta,
{
struct nios2_clockevent_dev *nios2_ced = to_nios2_clkevent(evt);
nios2_timer_config(&nios2_ced->timer, delta, evt->mode);
nios2_timer_config(&nios2_ced->timer, delta, false);
return 0;
}
static void nios2_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
static int nios2_timer_shutdown(struct clock_event_device *evt)
{
struct nios2_clockevent_dev *nios2_ced = to_nios2_clkevent(evt);
struct nios2_timer *timer = &nios2_ced->timer;
nios2_timer_stop(timer);
return 0;
}
static int nios2_timer_set_periodic(struct clock_event_device *evt)
{
unsigned long period;
struct nios2_clockevent_dev *nios2_ced = to_nios2_clkevent(evt);
struct nios2_timer *timer = &nios2_ced->timer;
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
period = DIV_ROUND_UP(timer->freq, HZ);
nios2_timer_config(timer, period, CLOCK_EVT_MODE_PERIODIC);
break;
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
nios2_timer_stop(timer);
break;
case CLOCK_EVT_MODE_RESUME:
nios2_timer_start(timer);
break;
nios2_timer_config(timer, period, true);
return 0;
}
static int nios2_timer_resume(struct clock_event_device *evt)
{
struct nios2_clockevent_dev *nios2_ced = to_nios2_clkevent(evt);
struct nios2_timer *timer = &nios2_ced->timer;
nios2_timer_start(timer);
return 0;
}
irqreturn_t timer_interrupt(int irq, void *dev_id)
@ -218,7 +224,10 @@ static struct nios2_clockevent_dev nios2_ce = {
.rating = 250,
.shift = 32,
.set_next_event = nios2_timer_set_next_event,
.set_mode = nios2_timer_set_mode,
.set_state_shutdown = nios2_timer_shutdown,
.set_state_periodic = nios2_timer_set_periodic,
.set_state_oneshot = nios2_timer_shutdown,
.tick_resume = nios2_timer_resume,
},
};