mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-21 16:29:59 +00:00
![Bartosz Golaszewski](/assets/img/avatar_default.png)
Implement a managed variant of of_mdiobus_register(). We need to make mdio_devres into its own module because otherwise we'd hit circular sumbol dependencies between phylib and of_mdio. Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com> Signed-off-by: David S. Miller <davem@davemloft.net>
133 lines
2.9 KiB
C
133 lines
2.9 KiB
C
// 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");
|