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m68k/coldfire/pit: Migrate to new 'set-state' interface

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Migrate m68k 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 in ->set_mode(RESUME) and so tick_resume()
isn't implemented.

Cc: Greg Ungerer <gerg@uclinux.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-m68k@lists.linux-m68k.org
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Viresh Kumar 2015-07-16 16:56:20 +05:30 committed by Greg Ungerer
parent c13dcf9f2d
commit 5bbc08fb0f
1 changed files with 28 additions and 34 deletions
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62
arch/m68k/coldfire/pit.c
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@ -42,37 +42,28 @@ static u32 pit_cnt;
* This is also called after resume to bring the PIT into operation again.
*/
static void init_cf_pit_timer(enum clock_event_mode mode,
struct clock_event_device *evt)
static int cf_pit_set_periodic(struct clock_event_device *evt)
{
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
__raw_writew(PIT_CYCLES_PER_JIFFY, TA(MCFPIT_PMR));
__raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE |
MCFPIT_PCSR_OVW | MCFPIT_PCSR_RLD |
MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR));
return 0;
}
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
__raw_writew(PIT_CYCLES_PER_JIFFY, TA(MCFPIT_PMR));
__raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE | \
MCFPIT_PCSR_OVW | MCFPIT_PCSR_RLD | \
MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR));
break;
static int cf_pit_set_oneshot(struct clock_event_device *evt)
{
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
__raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE |
MCFPIT_PCSR_OVW | MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR));
return 0;
}
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
break;
case CLOCK_EVT_MODE_ONESHOT:
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
__raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE | \
MCFPIT_PCSR_OVW | MCFPIT_PCSR_CLK64, \
TA(MCFPIT_PCSR));
break;
case CLOCK_EVT_MODE_RESUME:
/* Nothing to do here */
break;
}
static int cf_pit_shutdown(struct clock_event_device *evt)
{
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
return 0;
}
/*
@ -88,12 +79,15 @@ static int cf_pit_next_event(unsigned long delta,
}
struct clock_event_device cf_pit_clockevent = {
.name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_mode = init_cf_pit_timer,
.set_next_event = cf_pit_next_event,
.shift = 32,
.irq = MCF_IRQ_PIT1,
.name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
.set_state_shutdown = cf_pit_shutdown,
.set_state_periodic = cf_pit_set_periodic,
.set_state_oneshot = cf_pit_set_oneshot,
.set_next_event = cf_pit_next_event,
.shift = 32,
.irq = MCF_IRQ_PIT1,
};