diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 83 |
1 files changed, 7 insertions, 76 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index fc18fdbffd3..dc8bc913144 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -43,6 +43,7 @@ static DEFINE_IDR(i2c_adapter_idr); #define is_newstyle_driver(d) ((d)->probe || (d)->remove || (d)->detect) +static int i2c_attach_client(struct i2c_client *client); static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver); /* ------------------------------------------------------------------------- */ @@ -83,10 +84,6 @@ static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env) { struct i2c_client *client = to_i2c_client(dev); - /* by definition, legacy drivers can't hotplug */ - if (dev->driver) - return 0; - if (add_uevent_var(env, "MODALIAS=%s%s", I2C_MODULE_PREFIX, client->name)) return -ENOMEM; @@ -455,7 +452,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap) dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name); - /* create pre-declared device nodes for new-style drivers */ + /* create pre-declared device nodes */ if (adap->nr < __i2c_first_dynamic_bus_num) i2c_scan_static_board_info(adap); @@ -617,26 +614,9 @@ int i2c_del_adapter(struct i2c_adapter *adap) if (res) goto out_unlock; - /* detach any active clients. This must be done first, because - * it can fail; in which case we give up. */ + /* Detach any active clients */ list_for_each_entry_safe_reverse(client, _n, &adap->clients, list) { - struct i2c_driver *driver; - - driver = client->driver; - - /* new style, follow standard driver model */ - if (!driver || is_newstyle_driver(driver)) { - i2c_unregister_device(client); - continue; - } - - /* legacy drivers create and remove clients themselves */ - if ((res = driver->detach_client(client))) { - dev_err(&adap->dev, "detach_client failed for client " - "[%s] at address 0x%02x\n", client->name, - client->addr); - goto out_unlock; - } + i2c_unregister_device(client); } /* clean up the sysfs representation */ @@ -680,11 +660,7 @@ static int __attach_adapter(struct device *dev, void *data) /* * An i2c_driver is used with one or more i2c_client (device) nodes to access - * i2c slave chips, on a bus instance associated with some i2c_adapter. There - * are two models for binding the driver to its device: "new style" drivers - * follow the standard Linux driver model and just respond to probe() calls - * issued if the driver core sees they match(); "legacy" drivers create device - * nodes themselves. + * i2c slave chips, on a bus instance associated with some i2c_adapter. */ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) @@ -695,21 +671,11 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) if (unlikely(WARN_ON(!i2c_bus_type.p))) return -EAGAIN; - /* new style driver methods can't mix with legacy ones */ - if (is_newstyle_driver(driver)) { - if (driver->detach_adapter || driver->detach_client) { - printk(KERN_WARNING - "i2c-core: driver [%s] is confused\n", - driver->driver.name); - return -EINVAL; - } - } - /* add the driver to the list of i2c drivers in the driver core */ driver->driver.owner = owner; driver->driver.bus = &i2c_bus_type; - /* for new style drivers, when registration returns the driver core + /* When registration returns, the driver core * will have called probe() for all matching-but-unbound devices. */ res = driver_register(&driver->driver); @@ -748,29 +714,11 @@ static int __detach_adapter(struct device *dev, void *data) if (is_newstyle_driver(driver)) return 0; - /* Have a look at each adapter, if clients of this driver are still - * attached. If so, detach them to be able to kill the driver - * afterwards. - */ if (driver->detach_adapter) { if (driver->detach_adapter(adapter)) dev_err(&adapter->dev, "detach_adapter failed for driver [%s]\n", driver->driver.name); - } else { - struct i2c_client *client, *_n; - - list_for_each_entry_safe(client, _n, &adapter->clients, list) { - if (client->driver != driver) - continue; - dev_dbg(&adapter->dev, - "detaching client [%s] at 0x%02x\n", - client->name, client->addr); - if (driver->detach_client(client)) - dev_err(&adapter->dev, "detach_client " - "failed for client [%s] at 0x%02x\n", - client->name, client->addr); - } } return 0; @@ -812,7 +760,7 @@ static int i2c_check_addr(struct i2c_adapter *adapter, int addr) return device_for_each_child(&adapter->dev, &addr, __i2c_check_addr); } -int i2c_attach_client(struct i2c_client *client) +static int i2c_attach_client(struct i2c_client *client) { struct i2c_adapter *adapter = client->adapter; int res; @@ -854,23 +802,6 @@ out_err: "(%d)\n", client->name, client->addr, res); return res; } -EXPORT_SYMBOL(i2c_attach_client); - -int i2c_detach_client(struct i2c_client *client) -{ - struct i2c_adapter *adapter = client->adapter; - - mutex_lock(&adapter->clist_lock); - list_del(&client->list); - mutex_unlock(&adapter->clist_lock); - - init_completion(&client->released); - device_unregister(&client->dev); - wait_for_completion(&client->released); - - return 0; -} -EXPORT_SYMBOL(i2c_detach_client); /** * i2c_use_client - increments the reference count of the i2c client structure |