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ARM/w90x900/time: Migrate to new 'set-state' interface

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Migrate w90x900 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: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Viresh Kumar 2015-02-27 13:39:52 +05:30
parent 7639c0b8b3
commit 6c724d4388
1 changed files with 32 additions and 27 deletions
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59
arch/arm/mach-w90x900/time.c
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@ -48,31 +48,32 @@
static unsigned int timer0_load;
static void nuc900_clockevent_setmode(enum clock_event_mode mode,
struct clock_event_device *clk)
static int nuc900_clockevent_shutdown(struct clock_event_device *evt)
{
unsigned int val;
val = __raw_readl(REG_TCSR0);
val &= ~(0x03 << 27);
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
__raw_writel(timer0_load, REG_TICR0);
val |= (PERIOD | COUNTEN | INTEN | PRESCALE);
break;
case CLOCK_EVT_MODE_ONESHOT:
val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_RESUME:
break;
}
unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
__raw_writel(val, REG_TCSR0);
return 0;
}
static int nuc900_clockevent_set_oneshot(struct clock_event_device *evt)
{
unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
val |= (ONESHOT | COUNTEN | INTEN | PRESCALE);
__raw_writel(val, REG_TCSR0);
return 0;
}
static int nuc900_clockevent_set_periodic(struct clock_event_device *evt)
{
unsigned int val = __raw_readl(REG_TCSR0) & ~(0x03 << 27);
__raw_writel(timer0_load, REG_TICR0);
val |= (PERIOD | COUNTEN | INTEN | PRESCALE);
__raw_writel(val, REG_TCSR0);
return 0;
}
static int nuc900_clockevent_setnextevent(unsigned long evt,
@ -90,11 +91,15 @@ static int nuc900_clockevent_setnextevent(unsigned long evt,
}
static struct clock_event_device nuc900_clockevent_device = {
.name = "nuc900-timer0",
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_mode = nuc900_clockevent_setmode,
.set_next_event = nuc900_clockevent_setnextevent,
.rating = 300,
.name = "nuc900-timer0",
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
.set_state_shutdown = nuc900_clockevent_shutdown,
.set_state_periodic = nuc900_clockevent_set_periodic,
.set_state_oneshot = nuc900_clockevent_set_oneshot,
.tick_resume = nuc900_clockevent_shutdown,
.set_next_event = nuc900_clockevent_setnextevent,
.rating = 300,
};
/*IRQ handler for the timer*/