diff options
| -rw-r--r-- | drivers/base/power/domain.c | 68 | ||||
| -rw-r--r-- | include/linux/pm_domain.h | 2 |
2 files changed, 58 insertions, 12 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 94afaa2..3c9451b 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -56,6 +56,16 @@ static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev) return GENPD_DEV_CALLBACK(genpd, int, start, dev); } +static int genpd_save_dev(struct generic_pm_domain *genpd, struct device *dev) +{ + return GENPD_DEV_CALLBACK(genpd, int, save_state, dev); +} + +static int genpd_restore_dev(struct generic_pm_domain *genpd, struct device *dev) +{ + return GENPD_DEV_CALLBACK(genpd, int, restore_state, dev); +} + static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd) { bool ret = false; @@ -217,7 +227,6 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd, { struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd); struct device *dev = pdd->dev; - struct device_driver *drv = dev->driver; int ret = 0; if (gpd_data->need_restore) @@ -225,11 +234,9 @@ static int __pm_genpd_save_device(struct pm_domain_data *pdd, mutex_unlock(&genpd->lock); - if (drv && drv->pm && drv->pm->runtime_suspend) { - genpd_start_dev(genpd, dev); - ret = drv->pm->runtime_suspend(dev); - genpd_stop_dev(genpd, dev); - } + genpd_start_dev(genpd, dev); + ret = genpd_save_dev(genpd, dev); + genpd_stop_dev(genpd, dev); mutex_lock(&genpd->lock); @@ -250,18 +257,15 @@ static void __pm_genpd_restore_device(struct pm_domain_data *pdd, { struct generic_pm_domain_data *gpd_data = to_gpd_data(pdd); struct device *dev = pdd->dev; - struct device_driver *drv = dev->driver; if (!gpd_data->need_restore) return; mutex_unlock(&genpd->lock); - if (drv && drv->pm && drv->pm->runtime_resume) { - genpd_start_dev(genpd, dev); - drv->pm->runtime_resume(dev); - genpd_stop_dev(genpd, dev); - } + genpd_start_dev(genpd, dev); + genpd_restore_dev(genpd, dev); + genpd_stop_dev(genpd, dev); mutex_lock(&genpd->lock); @@ -1358,6 +1362,44 @@ int pm_genpd_remove_callbacks(struct device *dev) EXPORT_SYMBOL_GPL(pm_genpd_remove_callbacks); /** + * pm_genpd_default_save_state - Default "save device state" for PM domians. + * @dev: Device to handle. + */ +static int pm_genpd_default_save_state(struct device *dev) +{ + int (*cb)(struct device *__dev); + struct device_driver *drv = dev->driver; + + cb = dev_gpd_data(dev)->ops.save_state; + if (cb) + return cb(dev); + + if (drv && drv->pm && drv->pm->runtime_suspend) + return drv->pm->runtime_suspend(dev); + + return 0; +} + +/** + * pm_genpd_default_restore_state - Default PM domians "restore device state". + * @dev: Device to handle. + */ +static int pm_genpd_default_restore_state(struct device *dev) +{ + int (*cb)(struct device *__dev); + struct device_driver *drv = dev->driver; + + cb = dev_gpd_data(dev)->ops.restore_state; + if (cb) + return cb(dev); + + if (drv && drv->pm && drv->pm->runtime_resume) + return drv->pm->runtime_resume(dev); + + return 0; +} + +/** * pm_genpd_init - Initialize a generic I/O PM domain object. * @genpd: PM domain object to initialize. * @gov: PM domain governor to associate with the domain (may be NULL). @@ -1400,6 +1442,8 @@ 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; + genpd->dev_ops.save_state = pm_genpd_default_save_state; + genpd->dev_ops.restore_state = pm_genpd_default_restore_state; mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h index 8949d2d..731080d 100644 --- a/include/linux/pm_domain.h +++ b/include/linux/pm_domain.h @@ -26,6 +26,8 @@ struct dev_power_governor { struct gpd_dev_ops { int (*start)(struct device *dev); int (*stop)(struct device *dev); + int (*save_state)(struct device *dev); + int (*restore_state)(struct device *dev); bool (*active_wakeup)(struct device *dev); }; |