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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. * This is also called after resume to bring the PIT into operation again.
*/ */
static void init_cf_pit_timer(enum clock_event_mode mode, static int cf_pit_set_periodic(struct clock_event_device *evt)
struct clock_event_device *evt)
{ {
switch (mode) { __raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
case CLOCK_EVT_MODE_PERIODIC: __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)); static int cf_pit_set_oneshot(struct clock_event_device *evt)
__raw_writew(PIT_CYCLES_PER_JIFFY, TA(MCFPIT_PMR)); {
__raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE | \ __raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
MCFPIT_PCSR_OVW | MCFPIT_PCSR_RLD | \ __raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE |
MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR)); MCFPIT_PCSR_OVW | MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR));
break; return 0;
}
case CLOCK_EVT_MODE_SHUTDOWN: static int cf_pit_shutdown(struct clock_event_device *evt)
case CLOCK_EVT_MODE_UNUSED: {
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR));
__raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR)); return 0;
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;
}
} }
/* /*
@@ -88,12 +79,15 @@ static int cf_pit_next_event(unsigned long delta,
} }
struct clock_event_device cf_pit_clockevent = { struct clock_event_device cf_pit_clockevent = {
.name = "pit", .name = "pit",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT, .features = CLOCK_EVT_FEAT_PERIODIC |
.set_mode = init_cf_pit_timer, CLOCK_EVT_FEAT_ONESHOT,
.set_next_event = cf_pit_next_event, .set_state_shutdown = cf_pit_shutdown,
.shift = 32, .set_state_periodic = cf_pit_set_periodic,
.irq = MCF_IRQ_PIT1, .set_state_oneshot = cf_pit_set_oneshot,
.set_next_event = cf_pit_next_event,
.shift = 32,
.irq = MCF_IRQ_PIT1,
}; };