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sh: MTU2: Introduce clock events suspend/resume routines 

Introduce suspend/resume routines for SH MTU2 clock event devices
such that if those devices belong to a PM domain, the generic PM
domains framework will be notified that the given domain may be
turned off (during system suspend) or that it has to be turned on
(during system resume).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
This commit is contained in:
Rafael J. Wysocki 2012-08-06 01:43:41 +02:00
parent 9bb5ec8872
commit cc7ad4564b
1 changed files with 18 additions and 2 deletions
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20
drivers/clocksource/sh_mtu2.c
View File

@ -208,6 +208,16 @@ static void sh_mtu2_clock_event_mode(enum clock_event_mode mode,
}
}
static void sh_mtu2_clock_event_suspend(struct clock_event_device *ced)
{
pm_genpd_syscore_poweroff(&ced_to_sh_mtu2(ced)->pdev->dev);
}
static void sh_mtu2_clock_event_resume(struct clock_event_device *ced)
{
pm_genpd_syscore_poweron(&ced_to_sh_mtu2(ced)->pdev->dev);
}
static void sh_mtu2_register_clockevent(struct sh_mtu2_priv *p,
char *name, unsigned long rating)
{
@ -221,6 +231,8 @@ static void sh_mtu2_register_clockevent(struct sh_mtu2_priv *p,
ced->rating = rating;
ced->cpumask = cpumask_of(0);
ced->set_mode = sh_mtu2_clock_event_mode;
ced->suspend = sh_mtu2_clock_event_suspend;
ced->resume = sh_mtu2_clock_event_resume;
dev_info(&p->pdev->dev, "used for clock events\n");
clockevents_register_device(ced);
@ -307,8 +319,12 @@ static int __devinit sh_mtu2_probe(struct platform_device *pdev)
struct sh_mtu2_priv *p = platform_get_drvdata(pdev);
int ret;
if (!is_early_platform_device(pdev))
pm_genpd_dev_always_on(&pdev->dev, true);
if (!is_early_platform_device(pdev)) {
struct sh_timer_config *cfg = pdev->dev.platform_data;
if (cfg->clockevent_rating)
pm_genpd_dev_always_on(&pdev->dev, true);
}
if (p) {
dev_info(&pdev->dev, "kept as earlytimer\n");