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phy: improved lookup method

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Separates registration of the phy and the lookup. The method
is copied from clkdev.c,

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Heikki Krogerus
2014-11-19 17:28:18 +02:00
committed by Kishon Vijay Abraham I
parent d451057464
commit b7bc15b98e
3 changed files with 112 additions and 42 deletions
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84
drivers/phy/phy-core.c
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@@ -26,6 +26,7 @@
static struct class *phy_class;
static DEFINE_MUTEX(phy_provider_mutex);
static LIST_HEAD(phy_provider_list);
static LIST_HEAD(phys);
static DEFINE_IDA(phy_ida);
static void devm_phy_release(struct device *dev, void *res)
@@ -84,6 +85,87 @@ static struct phy *phy_lookup(struct device *device, const char *port)
return ERR_PTR(-ENODEV);
}
/**
* phy_create_lookup() - allocate and register PHY/device association
* @phy: the phy of the association
* @con_id: connection ID string on device
* @dev_id: the device of the association
*
* Creates and registers phy_lookup entry.
*/
int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id)
{
struct phy_lookup *pl;
if (!phy || !dev_id || !con_id)
return -EINVAL;
pl = kzalloc(sizeof(*pl), GFP_KERNEL);
if (!pl)
return -ENOMEM;
pl->dev_id = dev_id;
pl->con_id = con_id;
pl->phy = phy;
mutex_lock(&phy_provider_mutex);
list_add_tail(&pl->node, &phys);
mutex_unlock(&phy_provider_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(phy_create_lookup);
/**
* phy_remove_lookup() - find and remove PHY/device association
* @phy: the phy of the association
* @con_id: connection ID string on device
* @dev_id: the device of the association
*
* Finds and unregisters phy_lookup entry that was created with
* phy_create_lookup().
*/
void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id)
{
struct phy_lookup *pl;
if (!phy || !dev_id || !con_id)
return;
mutex_lock(&phy_provider_mutex);
list_for_each_entry(pl, &phys, node)
if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) &&
!strcmp(pl->con_id, con_id)) {
list_del(&pl->node);
kfree(pl);
break;
}
mutex_unlock(&phy_provider_mutex);
}
EXPORT_SYMBOL_GPL(phy_remove_lookup);
static struct phy *phy_find(struct device *dev, const char *con_id)
{
const char *dev_id = dev_name(dev);
struct phy_lookup *p, *pl = NULL;
struct phy *phy;
mutex_lock(&phy_provider_mutex);
list_for_each_entry(p, &phys, node)
if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) {
pl = p;
break;
}
mutex_unlock(&phy_provider_mutex);
phy = pl ? pl->phy : ERR_PTR(-ENODEV);
/* fall-back to the old lookup method for now */
if (IS_ERR(phy))
phy = phy_lookup(dev, con_id);
return phy;
}
static struct phy_provider *of_phy_provider_lookup(struct device_node *node)
{
struct phy_provider *phy_provider;
@@ -455,7 +537,7 @@ struct phy *phy_get(struct device *dev, const char *string)
string);
phy = _of_phy_get(dev->of_node, index);
} else {
phy = phy_lookup(dev, string);
phy = phy_find(dev, string);
}
if (IS_ERR(phy))
return phy;