forked from luck/tmp_suning_uos_patched
PM / OPP: Relocate few routines
In order to prepare for the later commits, this relocates few routines towards the top as they will be used earlier in the code. Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
Rafael J. Wysocki
parent
3566c5b277
commit
737002b5de
|
|
@ -437,6 +437,102 @@ static struct device_opp *_add_device_opp(struct device *dev)
|
|||
return dev_opp;
|
||||
}
|
||||
|
||||
/**
|
||||
* _kfree_device_rcu() - Free device_opp RCU handler
|
||||
* @head: RCU head
|
||||
*/
|
||||
static void _kfree_device_rcu(struct rcu_head *head)
|
||||
{
|
||||
struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
|
||||
|
||||
kfree_rcu(device_opp, rcu_head);
|
||||
}
|
||||
|
||||
/**
|
||||
* _kfree_opp_rcu() - Free OPP RCU handler
|
||||
* @head: RCU head
|
||||
*/
|
||||
static void _kfree_opp_rcu(struct rcu_head *head)
|
||||
{
|
||||
struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
|
||||
|
||||
kfree_rcu(opp, rcu_head);
|
||||
}
|
||||
|
||||
/**
|
||||
* _opp_remove() - Remove an OPP from a table definition
|
||||
* @dev_opp: points back to the device_opp struct this opp belongs to
|
||||
* @opp: pointer to the OPP to remove
|
||||
*
|
||||
* This function removes an opp definition from the opp list.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* It is assumed that the caller holds required mutex for an RCU updater
|
||||
* strategy.
|
||||
*/
|
||||
static void _opp_remove(struct device_opp *dev_opp,
|
||||
struct dev_pm_opp *opp)
|
||||
{
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
* frequency/voltage list.
|
||||
*/
|
||||
srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
|
||||
list_del_rcu(&opp->node);
|
||||
call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
|
||||
|
||||
if (list_empty(&dev_opp->opp_list)) {
|
||||
list_del_rcu(&dev_opp->node);
|
||||
call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
|
||||
_kfree_device_rcu);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_remove() - Remove an OPP from OPP list
|
||||
* @dev: device for which we do this operation
|
||||
* @freq: OPP to remove with matching 'freq'
|
||||
*
|
||||
* This function removes an opp from the opp list.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_remove(struct device *dev, unsigned long freq)
|
||||
{
|
||||
struct dev_pm_opp *opp;
|
||||
struct device_opp *dev_opp;
|
||||
bool found = false;
|
||||
|
||||
/* Hold our list modification lock here */
|
||||
mutex_lock(&dev_opp_list_lock);
|
||||
|
||||
dev_opp = _find_device_opp(dev);
|
||||
if (IS_ERR(dev_opp))
|
||||
goto unlock;
|
||||
|
||||
list_for_each_entry(opp, &dev_opp->opp_list, node) {
|
||||
if (opp->rate == freq) {
|
||||
found = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
|
||||
__func__, freq);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
_opp_remove(dev_opp, opp);
|
||||
unlock:
|
||||
mutex_unlock(&dev_opp_list_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
|
||||
|
||||
/**
|
||||
* _opp_add_dynamic() - Allocate a dynamic OPP.
|
||||
* @dev: device for which we do this operation
|
||||
|
|
@ -569,102 +665,6 @@ int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt)
|
|||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_add);
|
||||
|
||||
/**
|
||||
* _kfree_opp_rcu() - Free OPP RCU handler
|
||||
* @head: RCU head
|
||||
*/
|
||||
static void _kfree_opp_rcu(struct rcu_head *head)
|
||||
{
|
||||
struct dev_pm_opp *opp = container_of(head, struct dev_pm_opp, rcu_head);
|
||||
|
||||
kfree_rcu(opp, rcu_head);
|
||||
}
|
||||
|
||||
/**
|
||||
* _kfree_device_rcu() - Free device_opp RCU handler
|
||||
* @head: RCU head
|
||||
*/
|
||||
static void _kfree_device_rcu(struct rcu_head *head)
|
||||
{
|
||||
struct device_opp *device_opp = container_of(head, struct device_opp, rcu_head);
|
||||
|
||||
kfree_rcu(device_opp, rcu_head);
|
||||
}
|
||||
|
||||
/**
|
||||
* _opp_remove() - Remove an OPP from a table definition
|
||||
* @dev_opp: points back to the device_opp struct this opp belongs to
|
||||
* @opp: pointer to the OPP to remove
|
||||
*
|
||||
* This function removes an opp definition from the opp list.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* It is assumed that the caller holds required mutex for an RCU updater
|
||||
* strategy.
|
||||
*/
|
||||
static void _opp_remove(struct device_opp *dev_opp,
|
||||
struct dev_pm_opp *opp)
|
||||
{
|
||||
/*
|
||||
* Notify the changes in the availability of the operable
|
||||
* frequency/voltage list.
|
||||
*/
|
||||
srcu_notifier_call_chain(&dev_opp->srcu_head, OPP_EVENT_REMOVE, opp);
|
||||
list_del_rcu(&opp->node);
|
||||
call_srcu(&dev_opp->srcu_head.srcu, &opp->rcu_head, _kfree_opp_rcu);
|
||||
|
||||
if (list_empty(&dev_opp->opp_list)) {
|
||||
list_del_rcu(&dev_opp->node);
|
||||
call_srcu(&dev_opp->srcu_head.srcu, &dev_opp->rcu_head,
|
||||
_kfree_device_rcu);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* dev_pm_opp_remove() - Remove an OPP from OPP list
|
||||
* @dev: device for which we do this operation
|
||||
* @freq: OPP to remove with matching 'freq'
|
||||
*
|
||||
* This function removes an opp from the opp list.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* Hence this function internally uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void dev_pm_opp_remove(struct device *dev, unsigned long freq)
|
||||
{
|
||||
struct dev_pm_opp *opp;
|
||||
struct device_opp *dev_opp;
|
||||
bool found = false;
|
||||
|
||||
/* Hold our list modification lock here */
|
||||
mutex_lock(&dev_opp_list_lock);
|
||||
|
||||
dev_opp = _find_device_opp(dev);
|
||||
if (IS_ERR(dev_opp))
|
||||
goto unlock;
|
||||
|
||||
list_for_each_entry(opp, &dev_opp->opp_list, node) {
|
||||
if (opp->rate == freq) {
|
||||
found = true;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (!found) {
|
||||
dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n",
|
||||
__func__, freq);
|
||||
goto unlock;
|
||||
}
|
||||
|
||||
_opp_remove(dev_opp, opp);
|
||||
unlock:
|
||||
mutex_unlock(&dev_opp_list_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
|
||||
|
||||
/**
|
||||
* _opp_set_availability() - helper to set the availability of an opp
|
||||
* @dev: device for which we do this operation
|
||||
|
|
@ -824,6 +824,49 @@ struct srcu_notifier_head *dev_pm_opp_get_notifier(struct device *dev)
|
|||
EXPORT_SYMBOL_GPL(dev_pm_opp_get_notifier);
|
||||
|
||||
#ifdef CONFIG_OF
|
||||
/**
|
||||
* of_free_opp_table() - Free OPP table entries created from static DT entries
|
||||
* @dev: device pointer used to lookup device OPPs.
|
||||
*
|
||||
* Free OPPs created using static entries present in DT.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* Hence this function indirectly uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void of_free_opp_table(struct device *dev)
|
||||
{
|
||||
struct device_opp *dev_opp;
|
||||
struct dev_pm_opp *opp, *tmp;
|
||||
|
||||
/* Check for existing list for 'dev' */
|
||||
dev_opp = _find_device_opp(dev);
|
||||
if (IS_ERR(dev_opp)) {
|
||||
int error = PTR_ERR(dev_opp);
|
||||
|
||||
if (error != -ENODEV)
|
||||
WARN(1, "%s: dev_opp: %d\n",
|
||||
IS_ERR_OR_NULL(dev) ?
|
||||
"Invalid device" : dev_name(dev),
|
||||
error);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Hold our list modification lock here */
|
||||
mutex_lock(&dev_opp_list_lock);
|
||||
|
||||
/* Free static OPPs */
|
||||
list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
|
||||
if (!opp->dynamic)
|
||||
_opp_remove(dev_opp, opp);
|
||||
}
|
||||
|
||||
mutex_unlock(&dev_opp_list_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(of_free_opp_table);
|
||||
|
||||
/**
|
||||
* of_init_opp_table() - Initialize opp table from device tree
|
||||
* @dev: device pointer used to lookup device OPPs.
|
||||
|
|
@ -882,46 +925,4 @@ int of_init_opp_table(struct device *dev)
|
|||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(of_init_opp_table);
|
||||
|
||||
/**
|
||||
* of_free_opp_table() - Free OPP table entries created from static DT entries
|
||||
* @dev: device pointer used to lookup device OPPs.
|
||||
*
|
||||
* Free OPPs created using static entries present in DT.
|
||||
*
|
||||
* Locking: The internal device_opp and opp structures are RCU protected.
|
||||
* Hence this function indirectly uses RCU updater strategy with mutex locks
|
||||
* to keep the integrity of the internal data structures. Callers should ensure
|
||||
* that this function is *NOT* called under RCU protection or in contexts where
|
||||
* mutex cannot be locked.
|
||||
*/
|
||||
void of_free_opp_table(struct device *dev)
|
||||
{
|
||||
struct device_opp *dev_opp;
|
||||
struct dev_pm_opp *opp, *tmp;
|
||||
|
||||
/* Check for existing list for 'dev' */
|
||||
dev_opp = _find_device_opp(dev);
|
||||
if (IS_ERR(dev_opp)) {
|
||||
int error = PTR_ERR(dev_opp);
|
||||
if (error != -ENODEV)
|
||||
WARN(1, "%s: dev_opp: %d\n",
|
||||
IS_ERR_OR_NULL(dev) ?
|
||||
"Invalid device" : dev_name(dev),
|
||||
error);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Hold our list modification lock here */
|
||||
mutex_lock(&dev_opp_list_lock);
|
||||
|
||||
/* Free static OPPs */
|
||||
list_for_each_entry_safe(opp, tmp, &dev_opp->opp_list, node) {
|
||||
if (!opp->dynamic)
|
||||
_opp_remove(dev_opp, opp);
|
||||
}
|
||||
|
||||
mutex_unlock(&dev_opp_list_lock);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(of_free_opp_table);
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user