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path: root/drivers/base/power/domain.c
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Diffstat (limited to 'drivers/base/power/domain.c')
-rw-r--r--drivers/base/power/domain.c145
1 files changed, 59 insertions, 86 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 56705b52758e..de23b648fce3 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;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 07:07:08 +0300