From 9bb5ec8872312751f992cdac9968805fe03e81aa Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 6 Aug 2012 01:43:03 +0200 Subject: [PATCH] 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: Rafael J. Wysocki Acked-by: Magnus Damm --- drivers/clocksource/sh_cmt.c | 35 +++++++++++++++++++++++++++++++---- 1 file changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/clocksource/sh_cmt.c b/drivers/clocksource/sh_cmt.c index 98b06baafcc6..c06d27fc59e8 100644 --- a/drivers/clocksource/sh_cmt.c +++ b/drivers/clocksource/sh_cmt.c @@ -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)) - 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->clocksource_rating || cfg->clockevent_rating) + pm_genpd_dev_always_on(&pdev->dev, true); + } if (p) { dev_info(&pdev->dev, "kept as earlytimer\n"); -- GitLab