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AVR32/time: Migrate to new 'set-state' interface 

Migrate avr32 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 want to call cpu_idle_poll_ctrl() in shutdown only if we were in
oneshot or resume state earlier. Create another variable to save this
information and check that in shutdown callback.

Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
hifive-unleashed-5.1
Viresh Kumar 2015-07-16 16:56:15 +05:30 committed by Hans-Christian Egtvedt
parent 52721d9d33
commit 09adcdf212
1 changed files with 33 additions and 32 deletions
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65
arch/avr32/kernel/time.c
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@ -18,6 +18,7 @@
#include <mach/pm.h>
static bool disable_cpu_idle_poll;
static cycle_t read_cycle_count(struct clocksource *cs)
{
@ -80,45 +81,45 @@ static int comparator_next_event(unsigned long delta,
return 0;
}
static void comparator_mode(enum clock_event_mode mode,
struct clock_event_device *evdev)
static int comparator_shutdown(struct clock_event_device *evdev)
{
switch (mode) {
case CLOCK_EVT_MODE_ONESHOT:
pr_debug("%s: start\n", evdev->name);
/* FALLTHROUGH */
case CLOCK_EVT_MODE_RESUME:
pr_debug("%s: %s\n", __func__, evdev->name);
sysreg_write(COMPARE, 0);
if (disable_cpu_idle_poll) {
disable_cpu_idle_poll = false;
/*
* If we're using the COUNT and COMPARE registers we
* need to force idle poll.
* Only disable idle poll if we have forced that
* in a previous call.
*/
cpu_idle_poll_ctrl(true);
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
sysreg_write(COMPARE, 0);
pr_debug("%s: stop\n", evdev->name);
if (evdev->mode == CLOCK_EVT_MODE_ONESHOT ||
evdev->mode == CLOCK_EVT_MODE_RESUME) {
/*
* Only disable idle poll if we have forced that
* in a previous call.
*/
cpu_idle_poll_ctrl(false);
}
break;
default:
BUG();
cpu_idle_poll_ctrl(false);
}
return 0;
}
static int comparator_set_oneshot(struct clock_event_device *evdev)
{
pr_debug("%s: %s\n", __func__, evdev->name);
disable_cpu_idle_poll = true;
/*
* If we're using the COUNT and COMPARE registers we
* need to force idle poll.
*/
cpu_idle_poll_ctrl(true);
return 0;
}
static struct clock_event_device comparator = {
.name = "avr32_comparator",
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 16,
.rating = 50,
.set_next_event = comparator_next_event,
.set_mode = comparator_mode,
.name = "avr32_comparator",
.features = CLOCK_EVT_FEAT_ONESHOT,
.shift = 16,
.rating = 50,
.set_next_event = comparator_next_event,
.set_state_shutdown = comparator_shutdown,
.set_state_oneshot = comparator_set_oneshot,
.tick_resume = comparator_set_oneshot,
};
void read_persistent_clock(struct timespec *ts)