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