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

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Migrate sh_tmu 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: Magnus Damm <damm+renesas@opensource.se>
Cc: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
This commit is contained in:
Viresh Kumar 2015-06-18 16:24:36 +05:30 committed by Daniel Lezcano
parent 19a9ffb3d6
commit 2bcc4da3d4
1 changed files with 30 additions and 33 deletions
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63
drivers/clocksource/sh_tmu.c
View file

@ -240,7 +240,7 @@ static irqreturn_t sh_tmu_interrupt(int irq, void *dev_id)
struct sh_tmu_channel *ch = dev_id;
/* disable or acknowledge interrupt */
if (ch->ced.mode == CLOCK_EVT_MODE_ONESHOT)
if (clockevent_state_oneshot(&ch->ced))
sh_tmu_write(ch, TCR, TCR_TPSC_CLK4);
else
sh_tmu_write(ch, TCR, TCR_UNIE | TCR_TPSC_CLK4);
@ -358,42 +358,37 @@ static void sh_tmu_clock_event_start(struct sh_tmu_channel *ch, int periodic)
}
}
static void sh_tmu_clock_event_mode(enum clock_event_mode mode,
struct clock_event_device *ced)
static int sh_tmu_clock_event_shutdown(struct clock_event_device *ced)
{
struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
sh_tmu_disable(ch);
return 0;
}
static int sh_tmu_clock_event_set_state(struct clock_event_device *ced,
int periodic)
{
struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
int disabled = 0;
/* deal with old setting first */
switch (ced->mode) {
case CLOCK_EVT_MODE_PERIODIC:
case CLOCK_EVT_MODE_ONESHOT:
if (clockevent_state_oneshot(ced) || clockevent_state_periodic(ced))
sh_tmu_disable(ch);
disabled = 1;
break;
default:
break;
}
switch (mode) {
case CLOCK_EVT_MODE_PERIODIC:
dev_info(&ch->tmu->pdev->dev,
"ch%u: used for periodic clock events\n", ch->index);
sh_tmu_clock_event_start(ch, 1);
break;
case CLOCK_EVT_MODE_ONESHOT:
dev_info(&ch->tmu->pdev->dev,
"ch%u: used for oneshot clock events\n", ch->index);
sh_tmu_clock_event_start(ch, 0);
break;
case CLOCK_EVT_MODE_UNUSED:
if (!disabled)
sh_tmu_disable(ch);
break;
case CLOCK_EVT_MODE_SHUTDOWN:
default:
break;
}
dev_info(&ch->tmu->pdev->dev, "ch%u: used for %s clock events\n",
ch->index, periodic ? "periodic" : "oneshot");
sh_tmu_clock_event_start(ch, periodic);
return 0;
}
static int sh_tmu_clock_event_set_oneshot(struct clock_event_device *ced)
{
return sh_tmu_clock_event_set_state(ced, 0);
}
static int sh_tmu_clock_event_set_periodic(struct clock_event_device *ced)
{
return sh_tmu_clock_event_set_state(ced, 1);
}
static int sh_tmu_clock_event_next(unsigned long delta,
@ -401,7 +396,7 @@ static int sh_tmu_clock_event_next(unsigned long delta,
{
struct sh_tmu_channel *ch = ced_to_sh_tmu(ced);
BUG_ON(ced->mode != CLOCK_EVT_MODE_ONESHOT);
BUG_ON(!clockevent_state_oneshot(ced));
/* program new delta value */
sh_tmu_set_next(ch, delta, 0);
@ -430,7 +425,9 @@ static void sh_tmu_register_clockevent(struct sh_tmu_channel *ch,
ced->rating = 200;
ced->cpumask = cpu_possible_mask;
ced->set_next_event = sh_tmu_clock_event_next;
ced->set_mode = sh_tmu_clock_event_mode;
ced->set_state_shutdown = sh_tmu_clock_event_shutdown;
ced->set_state_periodic = sh_tmu_clock_event_set_periodic;
ced->set_state_oneshot = sh_tmu_clock_event_set_oneshot;
ced->suspend = sh_tmu_clock_event_suspend;
ced->resume = sh_tmu_clock_event_resume;