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-rw-r--r--drivers/base/power/domain.c145
-rw-r--r--drivers/base/power/domain_governor.c20
-rw-r--r--drivers/base/power/main.c18
-rw-r--r--drivers/base/power/runtime.c9
4 files changed, 81 insertions, 111 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 56705b5..de23b64 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -229,17 +229,6 @@ static int genpd_poweron(struct generic_pm_domain *genpd, unsigned int depth)
return ret;
}
-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 int genpd_dev_pm_qos_notifier(struct notifier_block *nb,
unsigned long val, void *ptr)
{
@@ -372,17 +361,63 @@ static void genpd_power_off_work_fn(struct work_struct *work)
}
/**
- * pm_genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.
+ * __genpd_runtime_suspend - walk the hierarchy of ->runtime_suspend() callbacks
+ * @dev: Device to handle.
+ */
+static int __genpd_runtime_suspend(struct device *dev)
+{
+ int (*cb)(struct device *__dev);
+
+ if (dev->type && dev->type->pm)
+ cb = dev->type->pm->runtime_suspend;
+ else if (dev->class && dev->class->pm)
+ cb = dev->class->pm->runtime_suspend;
+ else if (dev->bus && dev->bus->pm)
+ cb = dev->bus->pm->runtime_suspend;
+ else
+ cb = NULL;
+
+ if (!cb && dev->driver && dev->driver->pm)
+ cb = dev->driver->pm->runtime_suspend;
+
+ return cb ? cb(dev) : 0;
+}
+
+/**
+ * __genpd_runtime_resume - walk the hierarchy of ->runtime_resume() callbacks
+ * @dev: Device to handle.
+ */
+static int __genpd_runtime_resume(struct device *dev)
+{
+ int (*cb)(struct device *__dev);
+
+ if (dev->type && dev->type->pm)
+ cb = dev->type->pm->runtime_resume;
+ else if (dev->class && dev->class->pm)
+ cb = dev->class->pm->runtime_resume;
+ else if (dev->bus && dev->bus->pm)
+ cb = dev->bus->pm->runtime_resume;
+ else
+ cb = NULL;
+
+ if (!cb && dev->driver && dev->driver->pm)
+ cb = dev->driver->pm->runtime_resume;
+
+ return cb ? cb(dev) : 0;
+}
+
+/**
+ * genpd_runtime_suspend - Suspend a device belonging to I/O PM domain.
* @dev: Device to suspend.
*
* Carry out a runtime 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_runtime_suspend(struct device *dev)
+static int genpd_runtime_suspend(struct device *dev)
{
struct generic_pm_domain *genpd;
- bool (*stop_ok)(struct device *__dev);
+ bool (*suspend_ok)(struct device *__dev);
struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
bool runtime_pm = pm_runtime_enabled(dev);
ktime_t time_start;
@@ -401,21 +436,21 @@ static int pm_genpd_runtime_suspend(struct device *dev)
* runtime PM is disabled. Under these circumstances, we shall skip
* validating/measuring the PM QoS latency.
*/
- stop_ok = genpd->gov ? genpd->gov->stop_ok : NULL;
- if (runtime_pm && stop_ok && !stop_ok(dev))
+ suspend_ok = genpd->gov ? genpd->gov->suspend_ok : NULL;
+ if (runtime_pm && suspend_ok && !suspend_ok(dev))
return -EBUSY;
/* Measure suspend latency. */
if (runtime_pm)
time_start = ktime_get();
- ret = genpd_save_dev(genpd, dev);
+ ret = __genpd_runtime_suspend(dev);
if (ret)
return ret;
ret = genpd_stop_dev(genpd, dev);
if (ret) {
- genpd_restore_dev(genpd, dev);
+ __genpd_runtime_resume(dev);
return ret;
}
@@ -446,14 +481,14 @@ static int pm_genpd_runtime_suspend(struct device *dev)
}
/**
- * pm_genpd_runtime_resume - Resume a device belonging to I/O PM domain.
+ * genpd_runtime_resume - Resume a device belonging to I/O PM domain.
* @dev: Device to resume.
*
* Carry out a runtime 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 PM domain consisting of I/O devices.
*/
-static int pm_genpd_runtime_resume(struct device *dev)
+static int genpd_runtime_resume(struct device *dev)
{
struct generic_pm_domain *genpd;
struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
@@ -491,7 +526,7 @@ static int pm_genpd_runtime_resume(struct device *dev)
if (ret)
goto err_poweroff;
- ret = genpd_restore_dev(genpd, dev);
+ ret = __genpd_runtime_resume(dev);
if (ret)
goto err_stop;
@@ -695,15 +730,6 @@ static int pm_genpd_prepare(struct device *dev)
* at this point and a system wakeup event should be reported if it's
* set up to wake up the system from sleep states.
*/
- pm_runtime_get_noresume(dev);
- if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
- pm_wakeup_event(dev, 0);
-
- if (pm_wakeup_pending()) {
- pm_runtime_put(dev);
- return -EBUSY;
- }
-
if (resume_needed(dev, genpd))
pm_runtime_resume(dev);
@@ -716,10 +742,8 @@ static int pm_genpd_prepare(struct device *dev)
mutex_unlock(&genpd->lock);
- if (genpd->suspend_power_off) {
- pm_runtime_put_noidle(dev);
+ if (genpd->suspend_power_off)
return 0;
- }
/*
* The PM domain must be in the GPD_STATE_ACTIVE state at this point,
@@ -741,7 +765,6 @@ static int pm_genpd_prepare(struct device *dev)
pm_runtime_enable(dev);
}
- pm_runtime_put(dev);
return ret;
}
@@ -1427,54 +1450,6 @@ out:
}
EXPORT_SYMBOL_GPL(pm_genpd_remove_subdomain);
-/* Default device callbacks for generic PM domains. */
-
-/**
- * pm_genpd_default_save_state - Default "save device state" for PM domains.
- * @dev: Device to handle.
- */
-static int pm_genpd_default_save_state(struct device *dev)
-{
- int (*cb)(struct device *__dev);
-
- if (dev->type && dev->type->pm)
- cb = dev->type->pm->runtime_suspend;
- else if (dev->class && dev->class->pm)
- cb = dev->class->pm->runtime_suspend;
- else if (dev->bus && dev->bus->pm)
- cb = dev->bus->pm->runtime_suspend;
- else
- cb = NULL;
-
- if (!cb && dev->driver && dev->driver->pm)
- cb = dev->driver->pm->runtime_suspend;
-
- return cb ? cb(dev) : 0;
-}
-
-/**
- * pm_genpd_default_restore_state - Default PM domains "restore device state".
- * @dev: Device to handle.
- */
-static int pm_genpd_default_restore_state(struct device *dev)
-{
- int (*cb)(struct device *__dev);
-
- if (dev->type && dev->type->pm)
- cb = dev->type->pm->runtime_resume;
- else if (dev->class && dev->class->pm)
- cb = dev->class->pm->runtime_resume;
- else if (dev->bus && dev->bus->pm)
- cb = dev->bus->pm->runtime_resume;
- else
- cb = NULL;
-
- if (!cb && dev->driver && dev->driver->pm)
- cb = dev->driver->pm->runtime_resume;
-
- return cb ? cb(dev) : 0;
-}
-
/**
* pm_genpd_init - Initialize a generic I/O PM domain object.
* @genpd: PM domain object to initialize.
@@ -1498,8 +1473,8 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->device_count = 0;
genpd->max_off_time_ns = -1;
genpd->max_off_time_changed = true;
- genpd->domain.ops.runtime_suspend = pm_genpd_runtime_suspend;
- genpd->domain.ops.runtime_resume = pm_genpd_runtime_resume;
+ 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;
@@ -1520,8 +1495,6 @@ void pm_genpd_init(struct generic_pm_domain *genpd,
genpd->domain.ops.restore_early = pm_genpd_resume_early;
genpd->domain.ops.restore = pm_genpd_resume;
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;
if (genpd->flags & GENPD_FLAG_PM_CLK) {
genpd->dev_ops.stop = pm_clk_suspend;
diff --git a/drivers/base/power/domain_governor.c b/drivers/base/power/domain_governor.c
index 00a5436..2e0fce7 100644
--- a/drivers/base/power/domain_governor.c
+++ b/drivers/base/power/domain_governor.c
@@ -37,10 +37,10 @@ static int dev_update_qos_constraint(struct device *dev, void *data)
}
/**
- * default_stop_ok - Default PM domain governor routine for stopping devices.
+ * default_suspend_ok - Default PM domain governor routine to suspend devices.
* @dev: Device to check.
*/
-static bool default_stop_ok(struct device *dev)
+static bool default_suspend_ok(struct device *dev)
{
struct gpd_timing_data *td = &dev_gpd_data(dev)->td;
unsigned long flags;
@@ -51,13 +51,13 @@ static bool default_stop_ok(struct device *dev)
spin_lock_irqsave(&dev->power.lock, flags);
if (!td->constraint_changed) {
- bool ret = td->cached_stop_ok;
+ bool ret = td->cached_suspend_ok;
spin_unlock_irqrestore(&dev->power.lock, flags);
return ret;
}
td->constraint_changed = false;
- td->cached_stop_ok = false;
+ td->cached_suspend_ok = false;
td->effective_constraint_ns = -1;
constraint_ns = __dev_pm_qos_read_value(dev);
@@ -83,13 +83,13 @@ static bool default_stop_ok(struct device *dev)
return false;
}
td->effective_constraint_ns = constraint_ns;
- td->cached_stop_ok = constraint_ns >= 0;
+ td->cached_suspend_ok = constraint_ns >= 0;
/*
* The children have been suspended already, so we don't need to take
- * their stop latencies into account here.
+ * their suspend latencies into account here.
*/
- return td->cached_stop_ok;
+ return td->cached_suspend_ok;
}
/**
@@ -150,7 +150,7 @@ static bool __default_power_down_ok(struct dev_pm_domain *pd,
*/
td = &to_gpd_data(pdd)->td;
constraint_ns = td->effective_constraint_ns;
- /* default_stop_ok() need not be called before us. */
+ /* default_suspend_ok() need not be called before us. */
if (constraint_ns < 0) {
constraint_ns = dev_pm_qos_read_value(pdd->dev);
constraint_ns *= NSEC_PER_USEC;
@@ -227,7 +227,7 @@ static bool always_on_power_down_ok(struct dev_pm_domain *domain)
}
struct dev_power_governor simple_qos_governor = {
- .stop_ok = default_stop_ok,
+ .suspend_ok = default_suspend_ok,
.power_down_ok = default_power_down_ok,
};
@@ -236,5 +236,5 @@ struct dev_power_governor simple_qos_governor = {
*/
struct dev_power_governor pm_domain_always_on_gov = {
.power_down_ok = always_on_power_down_ok,
- .stop_ok = default_stop_ok,
+ .suspend_ok = default_suspend_ok,
};
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 6e7c3cc..c81667d 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1556,7 +1556,6 @@ int dpm_suspend(pm_message_t state)
static int device_prepare(struct device *dev, pm_message_t state)
{
int (*callback)(struct device *) = NULL;
- char *info = NULL;
int ret = 0;
if (dev->power.syscore)
@@ -1579,24 +1578,17 @@ static int device_prepare(struct device *dev, pm_message_t state)
goto unlock;
}
- if (dev->pm_domain) {
- info = "preparing power domain ";
+ if (dev->pm_domain)
callback = dev->pm_domain->ops.prepare;
- } else if (dev->type && dev->type->pm) {
- info = "preparing type ";
+ else if (dev->type && dev->type->pm)
callback = dev->type->pm->prepare;
- } else if (dev->class && dev->class->pm) {
- info = "preparing class ";
+ else if (dev->class && dev->class->pm)
callback = dev->class->pm->prepare;
- } else if (dev->bus && dev->bus->pm) {
- info = "preparing bus ";
+ else if (dev->bus && dev->bus->pm)
callback = dev->bus->pm->prepare;
- }
- if (!callback && dev->driver && dev->driver->pm) {
- info = "preparing driver ";
+ if (!callback && dev->driver && dev->driver->pm)
callback = dev->driver->pm->prepare;
- }
if (callback)
ret = callback(dev);
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index 4c70550..b746904 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -1506,11 +1506,16 @@ int pm_runtime_force_resume(struct device *dev)
goto out;
}
- ret = callback(dev);
+ ret = pm_runtime_set_active(dev);
if (ret)
goto out;
- pm_runtime_set_active(dev);
+ ret = callback(dev);
+ if (ret) {
+ pm_runtime_set_suspended(dev);
+ goto out;
+ }
+
pm_runtime_mark_last_busy(dev);
out:
pm_runtime_enable(dev);
generated by cgit v0.10.2 at 2024-07-06 09:24:46 (GMT)