1 /* Framework for MDIO devices, other than PHYs.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/interrupt.h>
17 #include <linux/kernel.h>
18 #include <linux/mdio.h>
19 #include <linux/mii.h>
20 #include <linux/module.h>
21 #include <linux/phy.h>
22 #include <linux/slab.h>
23 #include <linux/string.h>
24 #include <linux/unistd.h>
26 void mdio_device_free(struct mdio_device *mdiodev)
28 put_device(&mdiodev->dev);
30 EXPORT_SYMBOL(mdio_device_free);
32 static void mdio_device_release(struct device *dev)
34 kfree(to_mdio_device(dev));
37 struct mdio_device *mdio_device_create(struct mii_bus *bus, int addr)
39 struct mdio_device *mdiodev;
41 /* We allocate the device, and initialize the default values */
42 mdiodev = kzalloc(sizeof(*mdiodev), GFP_KERNEL);
44 return ERR_PTR(-ENOMEM);
46 mdiodev->dev.release = mdio_device_release;
47 mdiodev->dev.parent = &bus->dev;
48 mdiodev->dev.bus = &mdio_bus_type;
49 mdiodev->device_free = mdio_device_free;
50 mdiodev->device_remove = mdio_device_remove;
54 dev_set_name(&mdiodev->dev, PHY_ID_FMT, bus->id, addr);
56 device_initialize(&mdiodev->dev);
60 EXPORT_SYMBOL(mdio_device_create);
63 * mdio_device_register - Register the mdio device on the MDIO bus
64 * @mdiodev: mdio_device structure to be added to the MDIO bus
66 int mdio_device_register(struct mdio_device *mdiodev)
70 dev_info(&mdiodev->dev, "mdio_device_register\n");
72 err = mdiobus_register_device(mdiodev);
76 err = device_add(&mdiodev->dev);
78 pr_err("MDIO %d failed to add\n", mdiodev->addr);
85 mdiobus_unregister_device(mdiodev);
88 EXPORT_SYMBOL(mdio_device_register);
91 * mdio_device_remove - Remove a previously registered mdio device from the
93 * @mdiodev: mdio_device structure to remove
95 * This doesn't free the mdio_device itself, it merely reverses the effects
96 * of mdio_device_register(). Use mdio_device_free() to free the device
97 * after calling this function.
99 void mdio_device_remove(struct mdio_device *mdiodev)
101 device_del(&mdiodev->dev);
102 mdiobus_unregister_device(mdiodev);
104 EXPORT_SYMBOL(mdio_device_remove);
107 * mdio_probe - probe an MDIO device
108 * @dev: device to probe
110 * Description: Take care of setting up the mdio_device structure
111 * and calling the driver to probe the device.
113 static int mdio_probe(struct device *dev)
115 struct mdio_device *mdiodev = to_mdio_device(dev);
116 struct device_driver *drv = mdiodev->dev.driver;
117 struct mdio_driver *mdiodrv = to_mdio_driver(drv);
121 err = mdiodrv->probe(mdiodev);
126 static int mdio_remove(struct device *dev)
128 struct mdio_device *mdiodev = to_mdio_device(dev);
129 struct device_driver *drv = mdiodev->dev.driver;
130 struct mdio_driver *mdiodrv = to_mdio_driver(drv);
133 mdiodrv->remove(mdiodev);
139 * mdio_driver_register - register an mdio_driver with the MDIO layer
140 * @new_driver: new mdio_driver to register
142 int mdio_driver_register(struct mdio_driver *drv)
144 struct mdio_driver_common *mdiodrv = &drv->mdiodrv;
147 pr_info("mdio_driver_register: %s\n", mdiodrv->driver.name);
149 mdiodrv->driver.bus = &mdio_bus_type;
150 mdiodrv->driver.probe = mdio_probe;
151 mdiodrv->driver.remove = mdio_remove;
153 retval = driver_register(&mdiodrv->driver);
155 pr_err("%s: Error %d in registering driver\n",
156 mdiodrv->driver.name, retval);
163 EXPORT_SYMBOL(mdio_driver_register);
165 void mdio_driver_unregister(struct mdio_driver *drv)
167 struct mdio_driver_common *mdiodrv = &drv->mdiodrv;
169 driver_unregister(&mdiodrv->driver);
171 EXPORT_SYMBOL(mdio_driver_unregister);