lkml.org 
[lkml]   [2012]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC][PATCH 5/6] sh: CMT: Introduce clocksource/clock events suspend/resume routines
    Date

    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 <rjw@sisk.pl>
    ---
    drivers/clocksource/sh_cmt.c | 35 +++++++++++++++++++++++++++++++----
    1 file changed, 31 insertions(+), 4 deletions(-)

    Index: linux/drivers/clocksource/sh_cmt.c
    ===================================================================
    --- linux.orig/drivers/clocksource/sh_cmt.c
    +++ linux/drivers/clocksource/sh_cmt.c
    @@ -464,9 +464,20 @@ static void sh_cmt_clocksource_disable(s
    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(s
    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(unsig
    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(s
    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
    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");


    \
     
     \ /
      Last update: 2012-07-29 17:01    [W:0.028 / U:60.304 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site