diff options
Diffstat (limited to 'drivers/base/power/domain.c')
| -rw-r--r-- | drivers/base/power/domain.c | 301 |
1 files changed, 54 insertions, 247 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index de23b648f..a1f2aff33 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -187,8 +187,7 @@ static int genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth) struct gpd_link *link; int ret = 0; - if (genpd->status == GPD_STATE_ACTIVE - || (genpd->prepared_count > 0 && genpd->suspend_power_off)) + if (genpd->status == GPD_STATE_ACTIVE) return 0; /* @@ -735,82 +734,24 @@ static int pm_genpd_prepare(struct device *dev) mutex_lock(&genpd->lock); - if (genpd->prepared_count++ == 0) { + if (genpd->prepared_count++ == 0) genpd->suspended_count = 0; - genpd->suspend_power_off = genpd->status == GPD_STATE_POWER_OFF; - } mutex_unlock(&genpd->lock); - if (genpd->suspend_power_off) - return 0; - - /* - * The PM domain must be in the GPD_STATE_ACTIVE state at this point, - * so genpd_poweron() will return immediately, but if the device - * is suspended (e.g. it's been stopped by genpd_stop_dev()), we need - * to make it operational. - */ - pm_runtime_resume(dev); - __pm_runtime_disable(dev, false); - ret = pm_generic_prepare(dev); if (ret) { mutex_lock(&genpd->lock); - if (--genpd->prepared_count == 0) - genpd->suspend_power_off = false; + genpd->prepared_count--; mutex_unlock(&genpd->lock); - pm_runtime_enable(dev); } return ret; } /** - * pm_genpd_suspend - Suspend a device belonging to an I/O PM domain. - * @dev: Device to suspend. - * - * Suspend a device under the assumption that its pm_domain field points to the - * domain member of an object of type struct generic_pm_domain representing - * a PM domain consisting of I/O devices. - */ -static int pm_genpd_suspend(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_suspend(dev); -} - -/** - * pm_genpd_suspend_late - Late suspend of a device from an I/O PM domain. - * @dev: Device to suspend. - * - * Carry out a late suspend of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a PM domain consisting of I/O devices. - */ -static int pm_genpd_suspend_late(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_suspend_late(dev); -} - -/** * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain. * @dev: Device to suspend. * @@ -820,6 +761,7 @@ static int pm_genpd_suspend_late(struct device *dev) static int pm_genpd_suspend_noirq(struct device *dev) { struct generic_pm_domain *genpd; + int ret; dev_dbg(dev, "%s()\n", __func__); @@ -827,11 +769,14 @@ static int pm_genpd_suspend_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off - || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) + if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)) return 0; - genpd_stop_dev(genpd, dev); + if (genpd->dev_ops.stop && genpd->dev_ops.start) { + ret = pm_runtime_force_suspend(dev); + if (ret) + return ret; + } /* * Since all of the "noirq" callbacks are executed sequentially, it is @@ -853,6 +798,7 @@ static int pm_genpd_suspend_noirq(struct device *dev) static int pm_genpd_resume_noirq(struct device *dev) { struct generic_pm_domain *genpd; + int ret = 0; dev_dbg(dev, "%s()\n", __func__); @@ -860,8 +806,7 @@ static int pm_genpd_resume_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - if (genpd->suspend_power_off - || (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))) + if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev)) return 0; /* @@ -872,93 +817,10 @@ static int pm_genpd_resume_noirq(struct device *dev) pm_genpd_sync_poweron(genpd, true); genpd->suspended_count--; - return genpd_start_dev(genpd, dev); -} - -/** - * pm_genpd_resume_early - Early resume of a device in an I/O PM domain. - * @dev: Device to resume. - * - * Carry out an early resume of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a power domain consisting of I/O - * devices. - */ -static int pm_genpd_resume_early(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_resume_early(dev); -} - -/** - * pm_genpd_resume - Resume of device in an I/O PM domain. - * @dev: Device to resume. - * - * Resume a device under the assumption that its pm_domain field points to the - * domain member of an object of type struct generic_pm_domain representing - * a power domain consisting of I/O devices. - */ -static int pm_genpd_resume(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_resume(dev); -} - -/** - * pm_genpd_freeze - Freezing a device in an I/O PM domain. - * @dev: Device to freeze. - * - * Freeze a device under the assumption that its pm_domain field points to the - * domain member of an object of type struct generic_pm_domain representing - * a power domain consisting of I/O devices. - */ -static int pm_genpd_freeze(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_freeze(dev); -} + if (genpd->dev_ops.stop && genpd->dev_ops.start) + ret = pm_runtime_force_resume(dev); -/** - * pm_genpd_freeze_late - Late freeze of a device in an I/O PM domain. - * @dev: Device to freeze. - * - * Carry out a late freeze of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a power domain consisting of I/O - * devices. - */ -static int pm_genpd_freeze_late(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_freeze_late(dev); + return ret; } /** @@ -973,6 +835,7 @@ static int pm_genpd_freeze_late(struct device *dev) static int pm_genpd_freeze_noirq(struct device *dev) { struct generic_pm_domain *genpd; + int ret = 0; dev_dbg(dev, "%s()\n", __func__); @@ -980,7 +843,10 @@ static int pm_genpd_freeze_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - return genpd->suspend_power_off ? 0 : genpd_stop_dev(genpd, dev); + if (genpd->dev_ops.stop && genpd->dev_ops.start) + ret = pm_runtime_force_suspend(dev); + + return ret; } /** @@ -993,6 +859,7 @@ static int pm_genpd_freeze_noirq(struct device *dev) static int pm_genpd_thaw_noirq(struct device *dev) { struct generic_pm_domain *genpd; + int ret = 0; dev_dbg(dev, "%s()\n", __func__); @@ -1000,51 +867,10 @@ static int pm_genpd_thaw_noirq(struct device *dev) if (IS_ERR(genpd)) return -EINVAL; - return genpd->suspend_power_off ? - 0 : genpd_start_dev(genpd, dev); -} - -/** - * pm_genpd_thaw_early - Early thaw of device in an I/O PM domain. - * @dev: Device to thaw. - * - * Carry out an early thaw of a device under the assumption that its - * pm_domain field points to the domain member of an object of type - * struct generic_pm_domain representing a power domain consisting of I/O - * devices. - */ -static int pm_genpd_thaw_early(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); - - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_thaw_early(dev); -} - -/** - * pm_genpd_thaw - Thaw a device belonging to an I/O power domain. - * @dev: Device to thaw. - * - * Thaw a device under the assumption that its pm_domain field points to the - * domain member of an object of type struct generic_pm_domain representing - * a power domain consisting of I/O devices. - */ -static int pm_genpd_thaw(struct device *dev) -{ - struct generic_pm_domain *genpd; - - dev_dbg(dev, "%s()\n", __func__); + if (genpd->dev_ops.stop && genpd->dev_ops.start) + ret = pm_runtime_force_resume(dev); - genpd = dev_to_genpd(dev); - if (IS_ERR(genpd)) - return -EINVAL; - - return genpd->suspend_power_off ? 0 : pm_generic_thaw(dev); + return ret; } /** @@ -1057,6 +883,7 @@ static int pm_genpd_thaw(struct device *dev) static int pm_genpd_restore_noirq(struct device *dev) { struct generic_pm_domain *genpd; + int ret = 0; dev_dbg(dev, "%s()\n", __func__); @@ -1072,30 +899,20 @@ static int pm_genpd_restore_noirq(struct device *dev) * At this point suspended_count == 0 means we are being run for the * first time for the given domain in the present cycle. */ - if (genpd->suspended_count++ == 0) { + if (genpd->suspended_count++ == 0) /* * The boot kernel might put the domain into arbitrary state, * so make it appear as powered off to pm_genpd_sync_poweron(), * so that it tries to power it on in case it was really off. */ genpd->status = GPD_STATE_POWER_OFF; - if (genpd->suspend_power_off) { - /* - * If the domain was off before the hibernation, make - * sure it will be off going forward. - */ - genpd_power_off(genpd, true); - - return 0; - } - } - - if (genpd->suspend_power_off) - return 0; pm_genpd_sync_poweron(genpd, true); - return genpd_start_dev(genpd, dev); + if (genpd->dev_ops.stop && genpd->dev_ops.start) + ret = pm_runtime_force_resume(dev); + + return ret; } /** @@ -1110,7 +927,6 @@ static int pm_genpd_restore_noirq(struct device *dev) static void pm_genpd_complete(struct device *dev) { struct generic_pm_domain *genpd; - bool run_complete; dev_dbg(dev, "%s()\n", __func__); @@ -1118,20 +934,15 @@ static void pm_genpd_complete(struct device *dev) if (IS_ERR(genpd)) return; + pm_generic_complete(dev); + mutex_lock(&genpd->lock); - run_complete = !genpd->suspend_power_off; - if (--genpd->prepared_count == 0) - genpd->suspend_power_off = false; + genpd->prepared_count--; + if (!genpd->prepared_count) + genpd_queue_power_off_work(genpd); mutex_unlock(&genpd->lock); - - if (run_complete) { - pm_generic_complete(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); - pm_request_idle(dev); - } } /** @@ -1173,18 +984,10 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron); #else /* !CONFIG_PM_SLEEP */ #define pm_genpd_prepare NULL -#define pm_genpd_suspend NULL -#define pm_genpd_suspend_late NULL #define pm_genpd_suspend_noirq NULL -#define pm_genpd_resume_early NULL #define pm_genpd_resume_noirq NULL -#define pm_genpd_resume NULL -#define pm_genpd_freeze NULL -#define pm_genpd_freeze_late NULL #define pm_genpd_freeze_noirq NULL -#define pm_genpd_thaw_early NULL #define pm_genpd_thaw_noirq NULL -#define pm_genpd_thaw NULL #define pm_genpd_restore_noirq NULL #define pm_genpd_complete NULL @@ -1455,12 +1258,14 @@ EXPORT_SYMBOL_GPL(pm_genpd_remove_subdomain); * @genpd: PM domain object to initialize. * @gov: PM domain governor to associate with the domain (may be NULL). * @is_off: Initial value of the domain's power_is_off field. + * + * Returns 0 on successful initialization, else a negative error code. */ -void pm_genpd_init(struct generic_pm_domain *genpd, - struct dev_power_governor *gov, bool is_off) +int pm_genpd_init(struct generic_pm_domain *genpd, + struct dev_power_governor *gov, bool is_off) { if (IS_ERR_OR_NULL(genpd)) - return; + return -EINVAL; INIT_LIST_HEAD(&genpd->master_links); INIT_LIST_HEAD(&genpd->slave_links); @@ -1476,24 +1281,24 @@ void pm_genpd_init(struct generic_pm_domain *genpd, genpd->domain.ops.runtime_suspend = genpd_runtime_suspend; genpd->domain.ops.runtime_resume = genpd_runtime_resume; genpd->domain.ops.prepare = pm_genpd_prepare; - genpd->domain.ops.suspend = pm_genpd_suspend; - genpd->domain.ops.suspend_late = pm_genpd_suspend_late; + genpd->domain.ops.suspend = pm_generic_suspend; + genpd->domain.ops.suspend_late = pm_generic_suspend_late; genpd->domain.ops.suspend_noirq = pm_genpd_suspend_noirq; genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq; - genpd->domain.ops.resume_early = pm_genpd_resume_early; - genpd->domain.ops.resume = pm_genpd_resume; - genpd->domain.ops.freeze = pm_genpd_freeze; - genpd->domain.ops.freeze_late = pm_genpd_freeze_late; + genpd->domain.ops.resume_early = pm_generic_resume_early; + genpd->domain.ops.resume = pm_generic_resume; + genpd->domain.ops.freeze = pm_generic_freeze; + genpd->domain.ops.freeze_late = pm_generic_freeze_late; genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq; genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq; - genpd->domain.ops.thaw_early = pm_genpd_thaw_early; - genpd->domain.ops.thaw = pm_genpd_thaw; - genpd->domain.ops.poweroff = pm_genpd_suspend; - genpd->domain.ops.poweroff_late = pm_genpd_suspend_late; + genpd->domain.ops.thaw_early = pm_generic_thaw_early; + genpd->domain.ops.thaw = pm_generic_thaw; + genpd->domain.ops.poweroff = pm_generic_poweroff; + genpd->domain.ops.poweroff_late = pm_generic_poweroff_late; genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq; genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq; - genpd->domain.ops.restore_early = pm_genpd_resume_early; - genpd->domain.ops.restore = pm_genpd_resume; + genpd->domain.ops.restore_early = pm_generic_restore_early; + genpd->domain.ops.restore = pm_generic_restore; genpd->domain.ops.complete = pm_genpd_complete; if (genpd->flags & GENPD_FLAG_PM_CLK) { @@ -1518,6 +1323,8 @@ void pm_genpd_init(struct generic_pm_domain *genpd, mutex_lock(&gpd_list_lock); list_add(&genpd->gpd_list_node, &gpd_list); mutex_unlock(&gpd_list_lock); + + return 0; } EXPORT_SYMBOL_GPL(pm_genpd_init); |