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authorViresh Kumar <viresh.kumar@linaro.org>2019-07-04 13:06:17 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-07-04 10:40:54 +0200
commit0b07ee944701dabcddc294d903b5e8e21c2c5d95 (patch)
tree189fb165d7aa8cbeffadf1e63bc9eba5aa769446 /drivers/base
parent70a59fde6e69d1d8579f84bf4555bfffb3ce452d (diff)
downloadlinux-0b07ee944701dabcddc294d903b5e8e21c2c5d95.tar.bz2
PM / QOS: Pass request type to dev_pm_qos_{add|remove}_notifier()
In order to use the same set of routines to register notifiers for different request types, update the existing dev_pm_qos_{add|remove}_notifier() routines with an additional parameter: request-type. For now, it only supports resume-latency request type but will be extended to frequency limit (min/max) constraints later on. Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/base')
-rw-r--r--drivers/base/power/domain.c8
-rw-r--r--drivers/base/power/qos.c14
2 files changed, 17 insertions, 5 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index 33c30c1e6a30..b063bc41b0a9 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -1536,7 +1536,8 @@ static int genpd_add_device(struct generic_pm_domain *genpd, struct device *dev,
if (ret)
genpd_free_dev_data(dev, gpd_data);
else
- dev_pm_qos_add_notifier(dev, &gpd_data->nb);
+ dev_pm_qos_add_notifier(dev, &gpd_data->nb,
+ DEV_PM_QOS_RESUME_LATENCY);
return ret;
}
@@ -1569,7 +1570,8 @@ static int genpd_remove_device(struct generic_pm_domain *genpd,
pdd = dev->power.subsys_data->domain_data;
gpd_data = to_gpd_data(pdd);
- dev_pm_qos_remove_notifier(dev, &gpd_data->nb);
+ dev_pm_qos_remove_notifier(dev, &gpd_data->nb,
+ DEV_PM_QOS_RESUME_LATENCY);
genpd_lock(genpd);
@@ -1597,7 +1599,7 @@ static int genpd_remove_device(struct generic_pm_domain *genpd,
out:
genpd_unlock(genpd);
- dev_pm_qos_add_notifier(dev, &gpd_data->nb);
+ dev_pm_qos_add_notifier(dev, &gpd_data->nb, DEV_PM_QOS_RESUME_LATENCY);
return ret;
}
diff --git a/drivers/base/power/qos.c b/drivers/base/power/qos.c
index 6c91f8df1d59..cfd463212513 100644
--- a/drivers/base/power/qos.c
+++ b/drivers/base/power/qos.c
@@ -467,6 +467,7 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_remove_request);
*
* @dev: target device for the constraint
* @notifier: notifier block managed by caller.
+ * @type: request type.
*
* Will register the notifier into a notification chain that gets called
* upon changes to the target value for the device.
@@ -474,10 +475,14 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_remove_request);
* If the device's constraints object doesn't exist when this routine is called,
* it will be created (or error code will be returned if that fails).
*/
-int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier)
+int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type)
{
int ret = 0;
+ if (WARN_ON(type != DEV_PM_QOS_RESUME_LATENCY))
+ return -EINVAL;
+
mutex_lock(&dev_pm_qos_mtx);
if (IS_ERR(dev->power.qos))
@@ -500,15 +505,20 @@ EXPORT_SYMBOL_GPL(dev_pm_qos_add_notifier);
*
* @dev: target device for the constraint
* @notifier: notifier block to be removed.
+ * @type: request type.
*
* Will remove the notifier from the notification chain that gets called
* upon changes to the target value.
*/
int dev_pm_qos_remove_notifier(struct device *dev,
- struct notifier_block *notifier)
+ struct notifier_block *notifier,
+ enum dev_pm_qos_req_type type)
{
int retval = 0;
+ if (WARN_ON(type != DEV_PM_QOS_RESUME_LATENCY))
+ return -EINVAL;
+
mutex_lock(&dev_pm_qos_mtx);
/* Silently return if the constraints object is not present. */