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| author | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-13 12:31:52 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rjw@sisk.pl> | 2011-07-13 12:31:52 +0200 |
| commit | 5125bbf3880755419eff68672623cde49c4f31e8 (patch) | |
| tree | 50c4bfa1745e6d30ca16652a4d2ea848c568eb31 /drivers/base | |
| parent | PM / Domains: Queue up power off work only if it is not pending (diff) | |
| download | linux-5125bbf3880755419eff68672623cde49c4f31e8.tar.xz linux-5125bbf3880755419eff68672623cde49c4f31e8.zip | |
PM / Domains: Introduce function to power off all unused PM domains
Add a new function pm_genpd_poweroff_unused() queuing up the
execution of pm_genpd_poweroff() for every initialized generic PM
domain. Calling it will cause every generic PM domain without
devices in use to be powered off.
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Magnus Damm <damm@opensource.se>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index c3e4e2934e16..c2c537de22b6 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -16,6 +16,9 @@ #include <linux/sched.h> #include <linux/suspend.h> +static LIST_HEAD(gpd_list); +static DEFINE_MUTEX(gpd_list_lock); + #ifdef CONFIG_PM static struct generic_pm_domain *dev_to_genpd(struct device *dev) @@ -1241,4 +1244,22 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; genpd->domain.ops.restore = pm_genpd_restore; genpd->domain.ops.complete = pm_genpd_complete; + mutex_lock(&gpd_list_lock); + list_add(&genpd->gpd_list_node, &gpd_list); + mutex_unlock(&gpd_list_lock); +} + +/** + * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use. + */ +void pm_genpd_poweroff_unused(void) +{ + struct generic_pm_domain *genpd; + + mutex_lock(&gpd_list_lock); + + list_for_each_entry(genpd, &gpd_list, gpd_list_node) + genpd_queue_power_off_work(genpd); + + mutex_unlock(&gpd_list_lock); } |