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clockevents/drivers/cadence_ttc: Migrate to new 'set-state' interface 

Migrate cadence_ttc 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: Michal Simek <michal.simek@xilinx.com>
Cc: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Tested-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
This commit is contained in:
Viresh Kumar 2015-06-18 16:24:16 +05:30 committed by Daniel Lezcano
parent 3465f60917
commit 5c0a4bbefc
1 changed files with 32 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
drivers/clocksource/cadence_ttc_timer.c
View File

@ -191,40 +191,42 @@ static int ttc_set_next_event(unsigned long cycles,
}
/**
* ttc_set_mode - Sets the mode of timer
* ttc_set_{shutdown|oneshot|periodic} - Sets the state of timer
*
* @mode: Mode to be set
* @evt: Address of clock event instance
**/
static void ttc_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
static int ttc_shutdown(struct clock_event_device *evt)
{
struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
struct ttc_timer *timer = &ttce->ttc;
u32 ctrl_reg;
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
ttc_set_interval(timer, DIV_ROUND_CLOSEST(ttce->ttc.freq,
PRESCALE * HZ));
break;
case CLOCK_EVT_MODE_ONESHOT:
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
ctrl_reg = readl_relaxed(timer->base_addr +
TTC_CNT_CNTRL_OFFSET);
ctrl_reg |= TTC_CNT_CNTRL_DISABLE_MASK;
writel_relaxed(ctrl_reg,
timer->base_addr + TTC_CNT_CNTRL_OFFSET);
break;
case CLOCK_EVT_MODE_RESUME:
ctrl_reg = readl_relaxed(timer->base_addr +
TTC_CNT_CNTRL_OFFSET);
ctrl_reg &= ~TTC_CNT_CNTRL_DISABLE_MASK;
writel_relaxed(ctrl_reg,
timer->base_addr + TTC_CNT_CNTRL_OFFSET);
break;
}
ctrl_reg = readl_relaxed(timer->base_addr + TTC_CNT_CNTRL_OFFSET);
ctrl_reg |= TTC_CNT_CNTRL_DISABLE_MASK;
writel_relaxed(ctrl_reg, timer->base_addr + TTC_CNT_CNTRL_OFFSET);
return 0;
}
static int ttc_set_periodic(struct clock_event_device *evt)
{
struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
struct ttc_timer *timer = &ttce->ttc;
ttc_set_interval(timer,
DIV_ROUND_CLOSEST(ttce->ttc.freq, PRESCALE * HZ));
return 0;
}
static int ttc_resume(struct clock_event_device *evt)
{
struct ttc_timer_clockevent *ttce = to_ttc_timer_clkevent(evt);
struct ttc_timer *timer = &ttce->ttc;
u32 ctrl_reg;
ctrl_reg = readl_relaxed(timer->base_addr + TTC_CNT_CNTRL_OFFSET);
ctrl_reg &= ~TTC_CNT_CNTRL_DISABLE_MASK;
writel_relaxed(ctrl_reg, timer->base_addr + TTC_CNT_CNTRL_OFFSET);
return 0;
}
static int ttc_rate_change_clocksource_cb(struct notifier_block *nb,
@ -430,7 +432,10 @@ static void __init ttc_setup_clockevent(struct clk *clk,
ttcce->ce.name = "ttc_clockevent";
ttcce->ce.features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT;
ttcce->ce.set_next_event = ttc_set_next_event;
ttcce->ce.set_mode = ttc_set_mode;
ttcce->ce.set_state_shutdown = ttc_shutdown;
ttcce->ce.set_state_periodic = ttc_set_periodic;
ttcce->ce.set_state_oneshot = ttc_shutdown;
ttcce->ce.tick_resume = ttc_resume;
ttcce->ce.rating = 200;
ttcce->ce.irq = irq;
ttcce->ce.cpumask = cpu_possible_mask;