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

Migrate netx 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 aren't writing zero twice on the control register for shutdown or
resume state now.

Cc: Russell King <linux@arm.linux.org.uk>
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 a785fb39e1
commit c22437b78e
1 changed files with 30 additions and 27 deletions
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57
arch/arm/mach-netx/time.c
View File

@ -34,40 +34,40 @@
#define TIMER_CLOCKEVENT 0
#define TIMER_CLOCKSOURCE 1
static void netx_set_mode(enum clock_event_mode mode,
struct clock_event_device *clk)
static inline void timer_shutdown(struct clock_event_device *evt)
{
u32 tmode;
/* disable timer */
writel(0, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKEVENT));
}
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
writel(NETX_LATCH, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
tmode = NETX_GPIO_COUNTER_CTRL_RST_EN |
NETX_GPIO_COUNTER_CTRL_IRQ_EN |
NETX_GPIO_COUNTER_CTRL_RUN;
break;
static int netx_shutdown(struct clock_event_device *evt)
{
timer_shutdown(evt);
case CLOCK_EVT_MODE_ONESHOT:
writel(0, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
tmode = NETX_GPIO_COUNTER_CTRL_IRQ_EN |
NETX_GPIO_COUNTER_CTRL_RUN;
break;
return 0;
}
default:
WARN(1, "%s: unhandled mode %d\n", __func__, mode);
/* fall through */
case CLOCK_EVT_MODE_SHUTDOWN:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_RESUME:
tmode = 0;
break;
}
static int netx_set_oneshot(struct clock_event_device *evt)
{
u32 tmode = NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN;
timer_shutdown(evt);
writel(0, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
writel(tmode, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKEVENT));
return 0;
}
static int netx_set_periodic(struct clock_event_device *evt)
{
u32 tmode = NETX_GPIO_COUNTER_CTRL_RST_EN |
NETX_GPIO_COUNTER_CTRL_IRQ_EN | NETX_GPIO_COUNTER_CTRL_RUN;
timer_shutdown(evt);
writel(NETX_LATCH, NETX_GPIO_COUNTER_MAX(TIMER_CLOCKEVENT));
writel(tmode, NETX_GPIO_COUNTER_CTRL(TIMER_CLOCKEVENT));
return 0;
}
static int netx_set_next_event(unsigned long evt,
@ -81,7 +81,10 @@ static struct clock_event_device netx_clockevent = {
.name = "netx-timer" __stringify(TIMER_CLOCKEVENT),
.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
.set_next_event = netx_set_next_event,
.set_mode = netx_set_mode,
.set_state_shutdown = netx_shutdown,
.set_state_periodic = netx_set_periodic,
.set_state_oneshot = netx_set_oneshot,
.tick_resume = netx_shutdown,
};
/*