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// SPDX-License-Identifier: GPL-2.0-or-later
#include <linux/device.h>
#include <linux/of_mdio.h>
#include <linux/phy.h>
#include <linux/stddef.h>
struct mdiobus_devres {
struct mii_bus *mii;
};
static void devm_mdiobus_free(struct device *dev, void *this)
{
struct mdiobus_devres *dr = this;
mdiobus_free(dr->mii);
}
/**
* devm_mdiobus_alloc_size - Resource-managed mdiobus_alloc_size()
* @dev: Device to allocate mii_bus for
* @sizeof_priv: Space to allocate for private structure
*
* Managed mdiobus_alloc_size. mii_bus allocated with this function is
* automatically freed on driver detach.
*
* RETURNS:
* Pointer to allocated mii_bus on success, NULL on out-of-memory error.
*/
struct mii_bus *devm_mdiobus_alloc_size(struct device *dev, int sizeof_priv)
{
struct mdiobus_devres *dr;
dr = devres_alloc(devm_mdiobus_free, sizeof(*dr), GFP_KERNEL);
if (!dr)
return NULL;
dr->mii = mdiobus_alloc_size(sizeof_priv);
if (!dr->mii) {
devres_free(dr);
return NULL;
}
devres_add(dev, dr);
return dr->mii;
}
EXPORT_SYMBOL(devm_mdiobus_alloc_size);
static void devm_mdiobus_unregister(struct device *dev, void *this)
{
struct mdiobus_devres *dr = this;
mdiobus_unregister(dr->mii);
}
static int mdiobus_devres_match(struct device *dev,
void *this, void *match_data)
{
struct mdiobus_devres *res = this;
struct mii_bus *mii = match_data;
return mii == res->mii;
}
/**
* __devm_mdiobus_register - Resource-managed variant of mdiobus_register()
* @dev: Device to register mii_bus for
* @bus: MII bus structure to register
* @owner: Owning module
*
* Returns 0 on success, negative error number on failure.
*/
int __devm_mdiobus_register(struct device *dev, struct mii_bus *bus,
struct module *owner)
{
struct mdiobus_devres *dr;
int ret;
if (WARN_ON(!devres_find(dev, devm_mdiobus_free,
mdiobus_devres_match, bus)))
return -EINVAL;
dr = devres_alloc(devm_mdiobus_unregister, sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
ret = __mdiobus_register(bus, owner);
if (ret) {
devres_free(dr);
return ret;
}
dr->mii = bus;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL(__devm_mdiobus_register);
#if IS_ENABLED(CONFIG_OF_MDIO)
/**
* devm_of_mdiobus_register - Resource managed variant of of_mdiobus_register()
* @dev: Device to register mii_bus for
* @mdio: MII bus structure to register
* @np: Device node to parse
*/
int devm_of_mdiobus_register(struct device *dev, struct mii_bus *mdio,
struct device_node *np)
{
struct mdiobus_devres *dr;
int ret;
if (WARN_ON(!devres_find(dev, devm_mdiobus_free,
mdiobus_devres_match, mdio)))
return -EINVAL;
dr = devres_alloc(devm_mdiobus_unregister, sizeof(*dr), GFP_KERNEL);
if (!dr)
return -ENOMEM;
ret = of_mdiobus_register(mdio, np);
if (ret) {
devres_free(dr);
return ret;
}
dr->mii = mdio;
devres_add(dev, dr);
return 0;
}
EXPORT_SYMBOL(devm_of_mdiobus_register);
#endif /* CONFIG_OF_MDIO */
MODULE_LICENSE("GPL");
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