Merge branches 'pm-domains', 'pm-sleep' and 'pm-cpufreq'

[sfrench/cifs-2.6.git] / drivers / base / power / domain.c

diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index da49a8383dc30b074d28463e3b2771cd2ebd8adb..7f374233b4980ee5d551670d7004896a8b7c1ef3 100644 (file)
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -126,7 +126,7 @@ static const struct genpd_lock_ops genpd_spin_ops = {
 #define genpd_is_always_on(genpd)      (genpd->flags & GENPD_FLAG_ALWAYS_ON)
 
 static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
-               struct generic_pm_domain *genpd)
+               const struct generic_pm_domain *genpd)
 {
        bool ret;
 
@@ -181,12 +181,14 @@ static struct generic_pm_domain *dev_to_genpd(struct device *dev)
        return pd_to_genpd(dev->pm_domain);
 }
 
-static int genpd_stop_dev(struct generic_pm_domain *genpd, struct device *dev)
+static int genpd_stop_dev(const struct generic_pm_domain *genpd,
+                         struct device *dev)
 {
        return GENPD_DEV_CALLBACK(genpd, int, stop, dev);
 }
 
-static int genpd_start_dev(struct generic_pm_domain *genpd, struct device *dev)
+static int genpd_start_dev(const struct generic_pm_domain *genpd,
+                          struct device *dev)
 {
        return GENPD_DEV_CALLBACK(genpd, int, start, dev);
 }
@@ -443,7 +445,7 @@ static int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
 
                pdd = dev->power.subsys_data ?
                                dev->power.subsys_data->domain_data : NULL;
-               if (pdd && pdd->dev) {
+               if (pdd) {
                        to_gpd_data(pdd)->td.constraint_changed = true;
                        genpd = dev_to_genpd(dev);
                } else {
@@ -738,7 +740,7 @@ static bool pm_genpd_present(const struct generic_pm_domain *genpd)
 
 #ifdef CONFIG_PM_SLEEP
 
-static bool genpd_dev_active_wakeup(struct generic_pm_domain *genpd,
+static bool genpd_dev_active_wakeup(const struct generic_pm_domain *genpd,
                                    struct device *dev)
 {
        return GENPD_DEV_CALLBACK(genpd, bool, active_wakeup, dev);
@@ -840,7 +842,8 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock,
  * signal remote wakeup from the system's working state as needed by runtime PM.
  * Return 'true' in either of the above cases.
  */
-static bool resume_needed(struct device *dev, struct generic_pm_domain *genpd)
+static bool resume_needed(struct device *dev,
+                         const struct generic_pm_domain *genpd)
 {
        bool active_wakeup;
 
@@ -899,19 +902,19 @@ static int pm_genpd_prepare(struct device *dev)
 }
 
 /**
- * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
+ * genpd_finish_suspend - Completion of suspend or hibernation of device in an
+ *   I/O pm domain.
  * @dev: Device to suspend.
+ * @poweroff: Specifies if this is a poweroff_noirq or suspend_noirq callback.
  *
  * Stop the device and remove power from the domain if all devices in it have
  * been stopped.
  */
-static int pm_genpd_suspend_noirq(struct device *dev)
+static int genpd_finish_suspend(struct device *dev, bool poweroff)
 {
        struct generic_pm_domain *genpd;
        int ret;
 
-       dev_dbg(dev, "%s()\n", __func__);
-
        genpd = dev_to_genpd(dev);
        if (IS_ERR(genpd))
                return -EINVAL;
@@ -919,6 +922,13 @@ static int pm_genpd_suspend_noirq(struct device *dev)
        if (dev->power.wakeup_path && genpd_dev_active_wakeup(genpd, dev))
                return 0;
 
+       if (poweroff)
+               ret = pm_generic_poweroff_noirq(dev);
+       else
+               ret = pm_generic_suspend_noirq(dev);
+       if (ret)
+               return ret;
+
        if (genpd->dev_ops.stop && genpd->dev_ops.start) {
                ret = pm_runtime_force_suspend(dev);
                if (ret)
@@ -933,6 +943,20 @@ static int pm_genpd_suspend_noirq(struct device *dev)
        return 0;
 }
 
+/**
+ * pm_genpd_suspend_noirq - Completion of suspend of device in an I/O PM domain.
+ * @dev: Device to suspend.
+ *
+ * Stop the device and remove power from the domain if all devices in it have
+ * been stopped.
+ */
+static int pm_genpd_suspend_noirq(struct device *dev)
+{
+       dev_dbg(dev, "%s()\n", __func__);
+
+       return genpd_finish_suspend(dev, false);
+}
+
 /**
  * pm_genpd_resume_noirq - Start of resume of device in an I/O PM domain.
  * @dev: Device to resume.
@@ -961,6 +985,10 @@ static int pm_genpd_resume_noirq(struct device *dev)
        if (genpd->dev_ops.stop && genpd->dev_ops.start)
                ret = pm_runtime_force_resume(dev);
 
+       ret = pm_generic_resume_noirq(dev);
+       if (ret)
+               return ret;
+
        return ret;
 }
 
@@ -975,7 +1003,7 @@ static int pm_genpd_resume_noirq(struct device *dev)
  */
 static int pm_genpd_freeze_noirq(struct device *dev)
 {
-       struct generic_pm_domain *genpd;
+       const struct generic_pm_domain *genpd;
        int ret = 0;
 
        dev_dbg(dev, "%s()\n", __func__);
@@ -984,6 +1012,10 @@ static int pm_genpd_freeze_noirq(struct device *dev)
        if (IS_ERR(genpd))
                return -EINVAL;
 
+       ret = pm_generic_freeze_noirq(dev);
+       if (ret)
+               return ret;
+
        if (genpd->dev_ops.stop && genpd->dev_ops.start)
                ret = pm_runtime_force_suspend(dev);
 
@@ -999,7 +1031,7 @@ static int pm_genpd_freeze_noirq(struct device *dev)
  */
 static int pm_genpd_thaw_noirq(struct device *dev)
 {
-       struct generic_pm_domain *genpd;
+       const struct generic_pm_domain *genpd;
        int ret = 0;
 
        dev_dbg(dev, "%s()\n", __func__);
@@ -1008,10 +1040,28 @@ static int pm_genpd_thaw_noirq(struct device *dev)
        if (IS_ERR(genpd))
                return -EINVAL;
 
-       if (genpd->dev_ops.stop && genpd->dev_ops.start)
+       if (genpd->dev_ops.stop && genpd->dev_ops.start) {
                ret = pm_runtime_force_resume(dev);
+               if (ret)
+                       return ret;
+       }
 
-       return ret;
+       return pm_generic_thaw_noirq(dev);
+}
+
+/**
+ * pm_genpd_poweroff_noirq - Completion of hibernation of device in an
+ *   I/O PM domain.
+ * @dev: Device to poweroff.
+ *
+ * Stop the device and remove power from the domain if all devices in it have
+ * been stopped.
+ */
+static int pm_genpd_poweroff_noirq(struct device *dev)
+{
+       dev_dbg(dev, "%s()\n", __func__);
+
+       return genpd_finish_suspend(dev, true);
 }
 
 /**
@@ -1048,10 +1098,13 @@ static int pm_genpd_restore_noirq(struct device *dev)
        genpd_sync_power_on(genpd, true, 0);
        genpd_unlock(genpd);
 
-       if (genpd->dev_ops.stop && genpd->dev_ops.start)
+       if (genpd->dev_ops.stop && genpd->dev_ops.start) {
                ret = pm_runtime_force_resume(dev);
+               if (ret)
+                       return ret;
+       }
 
-       return ret;
+       return pm_generic_restore_noirq(dev);
 }
 
 /**
@@ -1127,6 +1180,7 @@ EXPORT_SYMBOL_GPL(pm_genpd_syscore_poweron);
 #define pm_genpd_resume_noirq          NULL
 #define pm_genpd_freeze_noirq          NULL
 #define pm_genpd_thaw_noirq            NULL
+#define pm_genpd_poweroff_noirq                NULL
 #define pm_genpd_restore_noirq         NULL
 #define pm_genpd_complete              NULL
 
@@ -1393,7 +1447,7 @@ EXPORT_SYMBOL_GPL(pm_genpd_add_subdomain);
 int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
                              struct generic_pm_domain *subdomain)
 {
-       struct gpd_link *link;
+       struct gpd_link *l, *link;
        int ret = -EINVAL;
 
        if (IS_ERR_OR_NULL(genpd) || IS_ERR_OR_NULL(subdomain))
@@ -1409,7 +1463,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
                goto out;
        }
 
-       list_for_each_entry(link, &genpd->master_links, master_node) {
+       list_for_each_entry_safe(link, l, &genpd->master_links, master_node) {
                if (link->slave != subdomain)
                        continue;
 
@@ -1493,7 +1547,7 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
        genpd->domain.ops.resume_noirq = pm_genpd_resume_noirq;
        genpd->domain.ops.freeze_noirq = pm_genpd_freeze_noirq;
        genpd->domain.ops.thaw_noirq = pm_genpd_thaw_noirq;
-       genpd->domain.ops.poweroff_noirq = pm_genpd_suspend_noirq;
+       genpd->domain.ops.poweroff_noirq = pm_genpd_poweroff_noirq;
        genpd->domain.ops.restore_noirq = pm_genpd_restore_noirq;
        genpd->domain.ops.complete = pm_genpd_complete;
 
@@ -1780,12 +1834,12 @@ EXPORT_SYMBOL_GPL(of_genpd_add_provider_onecell);
  */
 void of_genpd_del_provider(struct device_node *np)
 {
-       struct of_genpd_provider *cp;
+       struct of_genpd_provider *cp, *tmp;
        struct generic_pm_domain *gpd;
 
        mutex_lock(&gpd_list_lock);
        mutex_lock(&of_genpd_mutex);
-       list_for_each_entry(cp, &of_genpd_providers, link) {
+       list_for_each_entry_safe(cp, tmp, &of_genpd_providers, link) {
                if (cp->node == np) {
                        /*
                         * For each PM domain associated with the
@@ -1925,14 +1979,14 @@ EXPORT_SYMBOL_GPL(of_genpd_add_subdomain);
  */
 struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
 {
-       struct generic_pm_domain *gpd, *genpd = ERR_PTR(-ENOENT);
+       struct generic_pm_domain *gpd, *tmp, *genpd = ERR_PTR(-ENOENT);
        int ret;
 
        if (IS_ERR_OR_NULL(np))
                return ERR_PTR(-EINVAL);
 
        mutex_lock(&gpd_list_lock);
-       list_for_each_entry(gpd, &gpd_list, gpd_list_node) {
+       list_for_each_entry_safe(gpd, tmp, &gpd_list, gpd_list_node) {
                if (gpd->provider == &np->fwnode) {
                        ret = genpd_remove(gpd);
                        genpd = ret ? ERR_PTR(ret) : gpd;