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authorViresh Kumar <viresh.kumar@linaro.org>2015-06-18 13:54:47 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2015-08-10 12:40:46 +0300
commitf710bdeecffe9ce3ad8bdc358c6109d3848f6352 (patch)
treeb724521b5a9e924845da89cc59d34b131bb5b37c /drivers/clocksource/timer-integrator-ap.c
parente0d1ca332c1e91febd0de0ef69a45957cdc39fd8 (diff)
downloadlinux-f710bdeecffe9ce3ad8bdc358c6109d3848f6352.tar.xz
clockevents/drivers/integrator: Migrate to new 'set-state' interface
Migrate integrator 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. For oneshot mode the clkevt device was first getting disabled by clearing TIMER_CTRL_ENABLE bits in TIMER_CTRL register, followed by clearing TIMER_CTRL_PERIODIC bit. Both these are done with a single write operation now. Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Acked-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/clocksource/timer-integrator-ap.c')
-rw-r--r--drivers/clocksource/timer-integrator-ap.c58
1 files changed, 33 insertions, 25 deletions
diff --git a/drivers/clocksource/timer-integrator-ap.c b/drivers/clocksource/timer-integrator-ap.c
index a68866e0ecd4..3f59ac2180dc 100644
--- a/drivers/clocksource/timer-integrator-ap.c
+++ b/drivers/clocksource/timer-integrator-ap.c
@@ -75,33 +75,37 @@ static irqreturn_t integrator_timer_interrupt(int irq, void *dev_id)
return IRQ_HANDLED;
}
-static void clkevt_set_mode(enum clock_event_mode mode, struct clock_event_device *evt)
+static int clkevt_shutdown(struct clock_event_device *evt)
{
u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
/* Disable timer */
writel(ctrl, clkevt_base + TIMER_CTRL);
+ return 0;
+}
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- /* Enable the timer and start the periodic tick */
- writel(timer_reload, clkevt_base + TIMER_LOAD);
- ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_ONESHOT:
- /* Leave the timer disabled, .set_next_event will enable it */
- ctrl &= ~TIMER_CTRL_PERIODIC;
- writel(ctrl, clkevt_base + TIMER_CTRL);
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- case CLOCK_EVT_MODE_RESUME:
- default:
- /* Just leave in disabled state */
- break;
- }
+static int clkevt_set_oneshot(struct clock_event_device *evt)
+{
+ u32 ctrl = readl(clkevt_base + TIMER_CTRL) &
+ ~(TIMER_CTRL_ENABLE | TIMER_CTRL_PERIODIC);
+
+ /* Leave the timer disabled, .set_next_event will enable it */
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ return 0;
+}
+static int clkevt_set_periodic(struct clock_event_device *evt)
+{
+ u32 ctrl = readl(clkevt_base + TIMER_CTRL) & ~TIMER_CTRL_ENABLE;
+
+ /* Disable timer */
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+
+ /* Enable the timer and start the periodic tick */
+ writel(timer_reload, clkevt_base + TIMER_LOAD);
+ ctrl |= TIMER_CTRL_PERIODIC | TIMER_CTRL_ENABLE;
+ writel(ctrl, clkevt_base + TIMER_CTRL);
+ return 0;
}
static int clkevt_set_next_event(unsigned long next, struct clock_event_device *evt)
@@ -116,11 +120,15 @@ static int clkevt_set_next_event(unsigned long next, struct clock_event_device *
}
static struct clock_event_device integrator_clockevent = {
- .name = "timer1",
- .features = CLOCK_EVT_FEAT_PERIODIC | CLOCK_EVT_FEAT_ONESHOT,
- .set_mode = clkevt_set_mode,
- .set_next_event = clkevt_set_next_event,
- .rating = 300,
+ .name = "timer1",
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT,
+ .set_state_shutdown = clkevt_shutdown,
+ .set_state_periodic = clkevt_set_periodic,
+ .set_state_oneshot = clkevt_set_oneshot,
+ .tick_resume = clkevt_shutdown,
+ .set_next_event = clkevt_set_next_event,
+ .rating = 300,
};
static struct irqaction integrator_timer_irq = {