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-rw-r--r--drivers/base/cpu.c1
-rw-r--r--drivers/base/power/clock_ops.c13
-rw-r--r--drivers/base/power/common.c2
-rw-r--r--drivers/base/power/domain.c13
-rw-r--r--drivers/base/power/main.c11
-rw-r--r--drivers/base/power/runtime.c70
-rw-r--r--drivers/base/power/sysfs.c17
-rw-r--r--drivers/base/power/wakeup.c2
8 files changed, 89 insertions, 40 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index eb9443d5bae1..6ce93a52bf3f 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -427,6 +427,7 @@ __cpu_device_create(struct device *parent, void *drvdata,
dev->parent = parent;
dev->groups = groups;
dev->release = device_create_release;
+ device_set_pm_not_required(dev);
dev_set_drvdata(dev, drvdata);
retval = kobject_set_name_vargs(&dev->kobj, fmt, args);
diff --git a/drivers/base/power/clock_ops.c b/drivers/base/power/clock_ops.c
index 5a42ae4078c2..365ad751ce0f 100644
--- a/drivers/base/power/clock_ops.c
+++ b/drivers/base/power/clock_ops.c
@@ -65,10 +65,15 @@ static void pm_clk_acquire(struct device *dev, struct pm_clock_entry *ce)
if (IS_ERR(ce->clk)) {
ce->status = PCE_STATUS_ERROR;
} else {
- clk_prepare(ce->clk);
- ce->status = PCE_STATUS_ACQUIRED;
- dev_dbg(dev, "Clock %pC con_id %s managed by runtime PM.\n",
- ce->clk, ce->con_id);
+ if (clk_prepare(ce->clk)) {
+ ce->status = PCE_STATUS_ERROR;
+ dev_err(dev, "clk_prepare() failed\n");
+ } else {
+ ce->status = PCE_STATUS_ACQUIRED;
+ dev_dbg(dev,
+ "Clock %pC con_id %s managed by runtime PM.\n",
+ ce->clk, ce->con_id);
+ }
}
}
diff --git a/drivers/base/power/common.c b/drivers/base/power/common.c
index b413951c6abc..22aedb28aad7 100644
--- a/drivers/base/power/common.c
+++ b/drivers/base/power/common.c
@@ -160,7 +160,7 @@ EXPORT_SYMBOL_GPL(dev_pm_domain_attach_by_id);
* For a detailed function description, see dev_pm_domain_attach_by_id().
*/
struct device *dev_pm_domain_attach_by_name(struct device *dev,
- char *name)
+ const char *name)
{
if (dev->pm_domain)
return ERR_PTR(-EEXIST);
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 500de1dee967..2c334c01fc43 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -2483,7 +2483,7 @@ EXPORT_SYMBOL_GPL(genpd_dev_pm_attach_by_id);
* power-domain-names DT property. For further description see
* genpd_dev_pm_attach_by_id().
*/
-struct device *genpd_dev_pm_attach_by_name(struct device *dev, char *name)
+struct device *genpd_dev_pm_attach_by_name(struct device *dev, const char *name)
{
int index;
@@ -2948,18 +2948,11 @@ static int __init genpd_debug_init(void)
genpd_debugfs_dir = debugfs_create_dir("pm_genpd", NULL);
- if (!genpd_debugfs_dir)
- return -ENOMEM;
-
- d = debugfs_create_file("pm_genpd_summary", S_IRUGO,
- genpd_debugfs_dir, NULL, &summary_fops);
- if (!d)
- return -ENOMEM;
+ debugfs_create_file("pm_genpd_summary", S_IRUGO, genpd_debugfs_dir,
+ NULL, &summary_fops);
list_for_each_entry(genpd, &gpd_list, gpd_list_node) {
d = debugfs_create_dir(genpd->name, genpd_debugfs_dir);
- if (!d)
- return -ENOMEM;
debugfs_create_file("current_state", 0444,
d, genpd, &status_fops);
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 0992e67e862b..893ae464bfd6 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -124,6 +124,10 @@ void device_pm_unlock(void)
*/
void device_pm_add(struct device *dev)
{
+ /* Skip PM setup/initialization. */
+ if (device_pm_not_required(dev))
+ return;
+
pr_debug("PM: Adding info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
device_pm_check_callbacks(dev);
@@ -142,6 +146,9 @@ void device_pm_add(struct device *dev)
*/
void device_pm_remove(struct device *dev)
{
+ if (device_pm_not_required(dev))
+ return;
+
pr_debug("PM: Removing info for %s:%s\n",
dev->bus ? dev->bus->name : "No Bus", dev_name(dev));
complete_all(&dev->power.completion);
@@ -1741,8 +1748,10 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
if (dev->power.direct_complete) {
if (pm_runtime_status_suspended(dev)) {
pm_runtime_disable(dev);
- if (pm_runtime_status_suspended(dev))
+ if (pm_runtime_status_suspended(dev)) {
+ pm_dev_dbg(dev, state, "direct-complete ");
goto Complete;
+ }
pm_runtime_enable(dev);
}
diff --git a/drivers/base/power/runtime.c b/drivers/base/power/runtime.c
index ccd296dbb95c..78937c45278c 100644
--- a/drivers/base/power/runtime.c
+++ b/drivers/base/power/runtime.c
@@ -66,20 +66,30 @@ static int rpm_suspend(struct device *dev, int rpmflags);
*/
void update_pm_runtime_accounting(struct device *dev)
{
- unsigned long now = jiffies;
- unsigned long delta;
+ u64 now, last, delta;
- delta = now - dev->power.accounting_timestamp;
+ if (dev->power.disable_depth > 0)
+ return;
+
+ last = dev->power.accounting_timestamp;
+ now = ktime_get_mono_fast_ns();
dev->power.accounting_timestamp = now;
- if (dev->power.disable_depth > 0)
+ /*
+ * Because ktime_get_mono_fast_ns() is not monotonic during
+ * timekeeping updates, ensure that 'now' is after the last saved
+ * timesptamp.
+ */
+ if (now < last)
return;
+ delta = now - last;
+
if (dev->power.runtime_status == RPM_SUSPENDED)
- dev->power.suspended_jiffies += delta;
+ dev->power.suspended_time += delta;
else
- dev->power.active_jiffies += delta;
+ dev->power.active_time += delta;
}
static void __update_runtime_status(struct device *dev, enum rpm_status status)
@@ -88,6 +98,22 @@ static void __update_runtime_status(struct device *dev, enum rpm_status status)
dev->power.runtime_status = status;
}
+u64 pm_runtime_suspended_time(struct device *dev)
+{
+ u64 time;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->power.lock, flags);
+
+ update_pm_runtime_accounting(dev);
+ time = dev->power.suspended_time;
+
+ spin_unlock_irqrestore(&dev->power.lock, flags);
+
+ return time;
+}
+EXPORT_SYMBOL_GPL(pm_runtime_suspended_time);
+
/**
* pm_runtime_deactivate_timer - Deactivate given device's suspend timer.
* @dev: Device to handle.
@@ -129,24 +155,21 @@ static void pm_runtime_cancel_pending(struct device *dev)
u64 pm_runtime_autosuspend_expiration(struct device *dev)
{
int autosuspend_delay;
- u64 last_busy, expires = 0;
- u64 now = ktime_get_mono_fast_ns();
+ u64 expires;
if (!dev->power.use_autosuspend)
- goto out;
+ return 0;
autosuspend_delay = READ_ONCE(dev->power.autosuspend_delay);
if (autosuspend_delay < 0)
- goto out;
-
- last_busy = READ_ONCE(dev->power.last_busy);
+ return 0;
- expires = last_busy + (u64)autosuspend_delay * NSEC_PER_MSEC;
- if (expires <= now)
- expires = 0; /* Already expired. */
+ expires = READ_ONCE(dev->power.last_busy);
+ expires += (u64)autosuspend_delay * NSEC_PER_MSEC;
+ if (expires > ktime_get_mono_fast_ns())
+ return expires; /* Expires in the future */
- out:
- return expires;
+ return 0;
}
EXPORT_SYMBOL_GPL(pm_runtime_autosuspend_expiration);
@@ -1276,6 +1299,9 @@ void __pm_runtime_disable(struct device *dev, bool check_resume)
pm_runtime_put_noidle(dev);
}
+ /* Update time accounting before disabling PM-runtime. */
+ update_pm_runtime_accounting(dev);
+
if (!dev->power.disable_depth++)
__pm_runtime_barrier(dev);
@@ -1294,10 +1320,15 @@ void pm_runtime_enable(struct device *dev)
spin_lock_irqsave(&dev->power.lock, flags);
- if (dev->power.disable_depth > 0)
+ if (dev->power.disable_depth > 0) {
dev->power.disable_depth--;
- else
+
+ /* About to enable runtime pm, set accounting_timestamp to now */
+ if (!dev->power.disable_depth)
+ dev->power.accounting_timestamp = ktime_get_mono_fast_ns();
+ } else {
dev_warn(dev, "Unbalanced %s!\n", __func__);
+ }
WARN(!dev->power.disable_depth &&
dev->power.runtime_status == RPM_SUSPENDED &&
@@ -1494,7 +1525,6 @@ void pm_runtime_init(struct device *dev)
dev->power.request_pending = false;
dev->power.request = RPM_REQ_NONE;
dev->power.deferred_resume = false;
- dev->power.accounting_timestamp = jiffies;
INIT_WORK(&dev->power.work, pm_runtime_work);
dev->power.timer_expires = 0;
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index d713738ce796..c6bf76124184 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -125,9 +125,12 @@ static ssize_t runtime_active_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
+ u64 tmp;
spin_lock_irq(&dev->power.lock);
update_pm_runtime_accounting(dev);
- ret = sprintf(buf, "%i\n", jiffies_to_msecs(dev->power.active_jiffies));
+ tmp = dev->power.active_time;
+ do_div(tmp, NSEC_PER_MSEC);
+ ret = sprintf(buf, "%llu\n", tmp);
spin_unlock_irq(&dev->power.lock);
return ret;
}
@@ -138,10 +141,12 @@ static ssize_t runtime_suspended_time_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int ret;
+ u64 tmp;
spin_lock_irq(&dev->power.lock);
update_pm_runtime_accounting(dev);
- ret = sprintf(buf, "%i\n",
- jiffies_to_msecs(dev->power.suspended_jiffies));
+ tmp = dev->power.suspended_time;
+ do_div(tmp, NSEC_PER_MSEC);
+ ret = sprintf(buf, "%llu\n", tmp);
spin_unlock_irq(&dev->power.lock);
return ret;
}
@@ -648,6 +653,10 @@ int dpm_sysfs_add(struct device *dev)
{
int rc;
+ /* No need to create PM sysfs if explicitly disabled. */
+ if (device_pm_not_required(dev))
+ return 0;
+
rc = sysfs_create_group(&dev->kobj, &pm_attr_group);
if (rc)
return rc;
@@ -727,6 +736,8 @@ void rpm_sysfs_remove(struct device *dev)
void dpm_sysfs_remove(struct device *dev)
{
+ if (device_pm_not_required(dev))
+ return;
sysfs_unmerge_group(&dev->kobj, &pm_qos_latency_tolerance_attr_group);
dev_pm_qos_constraints_destroy(dev);
rpm_sysfs_remove(dev);
diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 5fa1898755a3..f1fee72ed970 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -783,7 +783,7 @@ void pm_wakeup_ws_event(struct wakeup_source *ws, unsigned int msec, bool hard)
EXPORT_SYMBOL_GPL(pm_wakeup_ws_event);
/**
- * pm_wakeup_event - Notify the PM core of a wakeup event.
+ * pm_wakeup_dev_event - Notify the PM core of a wakeup event.
* @dev: Device the wakeup event is related to.
* @msec: Anticipated event processing time (in milliseconds).
* @hard: If set, abort suspends in progress and wake up from suspend-to-idle.
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-12 05:40:53 +0000