diff options
| author | Viresh Kumar <viresh.kumar@linaro.org> | 2015-06-18 13:54:44 +0300 |
|---|---|---|
| committer | Daniel Lezcano <daniel.lezcano@linaro.org> | 2015-08-10 12:40:44 +0300 |
| commit | 85250fb89be3792c8a6793a594e30307c4e39214 (patch) | |
| tree | 57dac387eaa3ef849578111bc09c83b588a15a57 /drivers/clocksource/timer-atmel-pit.c | |
| parent | 1e729d378e75063bf3fa91c62ea372fb73012b24 (diff) | |
| download | linux-85250fb89be3792c8a6793a594e30307c4e39214.tar.xz | |
clockevents/drivers/atmel: Migrate to new 'set-state' interface
Migrate atmel 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: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/clocksource/timer-atmel-pit.c')
| -rw-r--r-- | drivers/clocksource/timer-atmel-pit.c | 41 |
1 files changed, 18 insertions, 23 deletions
diff --git a/drivers/clocksource/timer-atmel-pit.c b/drivers/clocksource/timer-atmel-pit.c index c0304ff608b0..58753223585b 100644 --- a/drivers/clocksource/timer-atmel-pit.c +++ b/drivers/clocksource/timer-atmel-pit.c @@ -90,33 +90,27 @@ static cycle_t read_pit_clk(struct clocksource *cs) return elapsed; } +static int pit_clkevt_shutdown(struct clock_event_device *dev) +{ + struct pit_data *data = clkevt_to_pit_data(dev); + + /* disable irq, leaving the clocksource active */ + pit_write(data->base, AT91_PIT_MR, (data->cycle - 1) | AT91_PIT_PITEN); + return 0; +} + /* * Clockevent device: interrupts every 1/HZ (== pit_cycles * MCK/16) */ -static void -pit_clkevt_mode(enum clock_event_mode mode, struct clock_event_device *dev) +static int pit_clkevt_set_periodic(struct clock_event_device *dev) { struct pit_data *data = clkevt_to_pit_data(dev); - switch (mode) { - case CLOCK_EVT_MODE_PERIODIC: - /* update clocksource counter */ - data->cnt += data->cycle * PIT_PICNT(pit_read(data->base, AT91_PIT_PIVR)); - pit_write(data->base, AT91_PIT_MR, - (data->cycle - 1) | AT91_PIT_PITEN | AT91_PIT_PITIEN); - break; - case CLOCK_EVT_MODE_ONESHOT: - BUG(); - /* FALLTHROUGH */ - case CLOCK_EVT_MODE_SHUTDOWN: - case CLOCK_EVT_MODE_UNUSED: - /* disable irq, leaving the clocksource active */ - pit_write(data->base, AT91_PIT_MR, - (data->cycle - 1) | AT91_PIT_PITEN); - break; - case CLOCK_EVT_MODE_RESUME: - break; - } + /* update clocksource counter */ + data->cnt += data->cycle * PIT_PICNT(pit_read(data->base, AT91_PIT_PIVR)); + pit_write(data->base, AT91_PIT_MR, + (data->cycle - 1) | AT91_PIT_PITEN | AT91_PIT_PITIEN); + return 0; } static void at91sam926x_pit_suspend(struct clock_event_device *cedev) @@ -162,7 +156,7 @@ static irqreturn_t at91sam926x_pit_interrupt(int irq, void *dev_id) WARN_ON_ONCE(!irqs_disabled()); /* The PIT interrupt may be disabled, and is shared */ - if ((data->clkevt.mode == CLOCK_EVT_MODE_PERIODIC) && + if (clockevent_state_periodic(&data->clkevt) && (pit_read(data->base, AT91_PIT_SR) & AT91_PIT_PITS)) { unsigned nr_ticks; @@ -227,7 +221,8 @@ static void __init at91sam926x_pit_common_init(struct pit_data *data) data->clkevt.rating = 100; data->clkevt.cpumask = cpumask_of(0); - data->clkevt.set_mode = pit_clkevt_mode; + data->clkevt.set_state_shutdown = pit_clkevt_shutdown; + data->clkevt.set_state_periodic = pit_clkevt_set_periodic; data->clkevt.resume = at91sam926x_pit_resume; data->clkevt.suspend = at91sam926x_pit_suspend; clockevents_register_device(&data->clkevt); |