From d5e4cbfe2049fca375cb19c4bc0cf676e8b4a88a Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 27 Nov 2011 13:11:36 +0100 Subject: PM / Domains: Make it possible to use per-device domain callbacks The current generic PM domains code requires that the same .stop(), .start() and .active_wakeup() device callback routines be used for all devices in the given domain, which is inflexible and may not cover some specific use cases. For this reason, make it possible to use device specific .start()/.stop() and .active_wakeup() callback routines by adding corresponding callback pointers to struct generic_pm_domain_data. Add a new helper routine, pm_genpd_register_callbacks(), that can be used to populate the new per-device callback pointers. Modify the shmobile's power domains code to allow drivers to add their own code to be run during the device stop and start operations with the help of the new callback pointers. Signed-off-by: Rafael J. Wysocki Acked-by: Magnus Damm --- arch/arm/mach-shmobile/pm-sh7372.c | 40 ++++++++++++++++++++++++++++++++++---- 1 file changed, 36 insertions(+), 4 deletions(-) (limited to 'arch/arm/mach-shmobile/pm-sh7372.c') diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c index 34bbcbfb1706..6777bb1be059 100644 --- a/arch/arm/mach-shmobile/pm-sh7372.c +++ b/arch/arm/mach-shmobile/pm-sh7372.c @@ -156,7 +156,10 @@ static void sh7372_a4r_suspend(void) static bool pd_active_wakeup(struct device *dev) { - return true; + bool (*active_wakeup)(struct device *dev); + + active_wakeup = dev_gpd_data(dev)->ops.active_wakeup; + return active_wakeup ? active_wakeup(dev) : true; } static bool sh7372_power_down_forbidden(struct dev_pm_domain *domain) @@ -168,15 +171,44 @@ struct dev_power_governor sh7372_always_on_gov = { .power_down_ok = sh7372_power_down_forbidden, }; +static int sh7372_stop_dev(struct device *dev) +{ + int (*stop)(struct device *dev); + + stop = dev_gpd_data(dev)->ops.stop; + if (stop) { + int ret = stop(dev); + if (ret) + return ret; + } + return pm_clk_suspend(dev); +} + +static int sh7372_start_dev(struct device *dev) +{ + int (*start)(struct device *dev); + int ret; + + ret = pm_clk_resume(dev); + if (ret) + return ret; + + start = dev_gpd_data(dev)->ops.start; + if (start) + ret = start(dev); + + return ret; +} + void sh7372_init_pm_domain(struct sh7372_pm_domain *sh7372_pd) { struct generic_pm_domain *genpd = &sh7372_pd->genpd; pm_genpd_init(genpd, sh7372_pd->gov, false); - genpd->stop_device = pm_clk_suspend; - genpd->start_device = pm_clk_resume; + genpd->dev_ops.stop = sh7372_stop_dev; + genpd->dev_ops.start = sh7372_start_dev; + genpd->dev_ops.active_wakeup = pd_active_wakeup; genpd->dev_irq_safe = true; - genpd->active_wakeup = pd_active_wakeup; genpd->power_off = pd_power_down; genpd->power_on = pd_power_up; __pd_power_up(sh7372_pd, false); -- cgit v1.2.3