Commit 9bb5ec88 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki
Browse files

sh: CMT: Introduce clocksource/clock events suspend/resume routines 



Introduce suspend/resume routines for SH CMT clock event devices and
modify the suspend/resume routines for SH CMT clock sources 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: default avatarRafael J. Wysocki <rjw@sisk.pl>
Acked-by: default avatarMagnus Damm <damm@opensource.se>
parent eaa49a8c

drivers/clocksource/sh_cmt.c

+31 −4
Original line number Diff line number Diff line
@@ -464,9 +464,20 @@ static void sh_cmt_clocksource_disable(struct clocksource *cs) 
	sh_cmt_stop(cs_to_sh_cmt(cs), FLAG_CLOCKSOURCE);

}



static void sh_cmt_clocksource_suspend(struct clocksource *cs)

{

	struct sh_cmt_priv *p = cs_to_sh_cmt(cs);



	sh_cmt_stop(p, FLAG_CLOCKSOURCE);

	pm_genpd_syscore_poweroff(&p->pdev->dev);

}



static void sh_cmt_clocksource_resume(struct clocksource *cs)

{

	sh_cmt_start(cs_to_sh_cmt(cs), FLAG_CLOCKSOURCE);

	struct sh_cmt_priv *p = cs_to_sh_cmt(cs);



	pm_genpd_syscore_poweron(&p->pdev->dev);

	sh_cmt_start(p, FLAG_CLOCKSOURCE);

}



static int sh_cmt_register_clocksource(struct sh_cmt_priv *p,
@@ -479,7 +490,7 @@ static int sh_cmt_register_clocksource(struct sh_cmt_priv *p, 
	cs->read = sh_cmt_clocksource_read;

	cs->enable = sh_cmt_clocksource_enable;

	cs->disable = sh_cmt_clocksource_disable;

	cs->suspend = sh_cmt_clocksource_disable;

	cs->suspend = sh_cmt_clocksource_suspend;

	cs->resume = sh_cmt_clocksource_resume;

	cs->mask = CLOCKSOURCE_MASK(sizeof(unsigned long) * 8);

	cs->flags = CLOCK_SOURCE_IS_CONTINUOUS;
@@ -562,6 +573,16 @@ static int sh_cmt_clock_event_next(unsigned long delta, 
	return 0;

}



static void sh_cmt_clock_event_suspend(struct clock_event_device *ced)

{

	pm_genpd_syscore_poweroff(&ced_to_sh_cmt(ced)->pdev->dev);

}



static void sh_cmt_clock_event_resume(struct clock_event_device *ced)

{

	pm_genpd_syscore_poweron(&ced_to_sh_cmt(ced)->pdev->dev);

}



static void sh_cmt_register_clockevent(struct sh_cmt_priv *p,

				       char *name, unsigned long rating)

{
@@ -576,6 +597,8 @@ static void sh_cmt_register_clockevent(struct sh_cmt_priv *p, 
	ced->cpumask = cpumask_of(0);

	ced->set_next_event = sh_cmt_clock_event_next;

	ced->set_mode = sh_cmt_clock_event_mode;

	ced->suspend = sh_cmt_clock_event_suspend;

	ced->resume = sh_cmt_clock_event_resume;



	dev_info(&p->pdev->dev, "used for clock events\n");

	clockevents_register_device(ced);
@@ -690,8 +713,12 @@ static int __devinit sh_cmt_probe(struct platform_device *pdev) 
	struct sh_cmt_priv *p = platform_get_drvdata(pdev);

	int ret;



	if (!is_early_platform_device(pdev))

	if (!is_early_platform_device(pdev)) {

		struct sh_timer_config *cfg = pdev->dev.platform_data;



		if (cfg->clocksource_rating || cfg->clockevent_rating)

			pm_genpd_dev_always_on(&pdev->dev, true);

	}



	if (p) {

		dev_info(&pdev->dev, "kept as earlytimer\n");

CRA Git | Maintained and supported by SUSTech CRA and CCSE