diff options
Diffstat (limited to 'drivers/i2c/i2c-core.c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 70 |
1 files changed, 22 insertions, 48 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 37df0f14c38..4f34823e86b 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -558,11 +558,9 @@ static void i2c_scan_static_board_info(struct i2c_adapter *adapter) up_read(&__i2c_board_lock); } -static int i2c_do_add_adapter(struct device_driver *d, void *data) +static int i2c_do_add_adapter(struct i2c_driver *driver, + struct i2c_adapter *adap) { - struct i2c_driver *driver = to_i2c_driver(d); - struct i2c_adapter *adap = data; - /* Detect supported devices on that bus, and instantiate them */ i2c_detect(adap, driver); @@ -574,6 +572,11 @@ static int i2c_do_add_adapter(struct device_driver *d, void *data) return 0; } +static int __process_new_adapter(struct device_driver *d, void *data) +{ + return i2c_do_add_adapter(to_i2c_driver(d), data); +} + static int i2c_register_adapter(struct i2c_adapter *adap) { int res = 0, dummy; @@ -614,7 +617,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap) /* Notify drivers */ mutex_lock(&core_lock); dummy = bus_for_each_drv(&i2c_bus_type, NULL, adap, - i2c_do_add_adapter); + __process_new_adapter); mutex_unlock(&core_lock); return 0; @@ -715,10 +718,9 @@ retry: } EXPORT_SYMBOL_GPL(i2c_add_numbered_adapter); -static int i2c_do_del_adapter(struct device_driver *d, void *data) +static int i2c_do_del_adapter(struct i2c_driver *driver, + struct i2c_adapter *adapter) { - struct i2c_driver *driver = to_i2c_driver(d); - struct i2c_adapter *adapter = data; struct i2c_client *client, *_n; int res; @@ -750,6 +752,11 @@ static int __unregister_client(struct device *dev, void *dummy) return 0; } +static int __process_removed_adapter(struct device_driver *d, void *data) +{ + return i2c_do_del_adapter(to_i2c_driver(d), data); +} + /** * i2c_del_adapter - unregister I2C adapter * @adap: the adapter being unregistered @@ -777,7 +784,7 @@ int i2c_del_adapter(struct i2c_adapter *adap) /* Tell drivers about this removal */ mutex_lock(&core_lock); res = bus_for_each_drv(&i2c_bus_type, NULL, adap, - i2c_do_del_adapter); + __process_removed_adapter); mutex_unlock(&core_lock); if (res) return res; @@ -826,22 +833,11 @@ EXPORT_SYMBOL(i2c_del_adapter); /* ------------------------------------------------------------------------- */ -static int __attach_adapter(struct device *dev, void *data) +static int __process_new_driver(struct device *dev, void *data) { - struct i2c_adapter *adapter; - struct i2c_driver *driver = data; - if (dev->type != &i2c_adapter_type) return 0; - adapter = to_i2c_adapter(dev); - - i2c_detect(adapter, driver); - - /* Legacy drivers scan i2c busses directly */ - if (driver->attach_adapter) - driver->attach_adapter(adapter); - - return 0; + return i2c_do_add_adapter(data, to_i2c_adapter(dev)); } /* @@ -873,40 +869,18 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver) INIT_LIST_HEAD(&driver->clients); /* Walk the adapters that are already present */ mutex_lock(&core_lock); - bus_for_each_dev(&i2c_bus_type, NULL, driver, __attach_adapter); + bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_new_driver); mutex_unlock(&core_lock); return 0; } EXPORT_SYMBOL(i2c_register_driver); -static int __detach_adapter(struct device *dev, void *data) +static int __process_removed_driver(struct device *dev, void *data) { - struct i2c_adapter *adapter; - struct i2c_driver *driver = data; - struct i2c_client *client, *_n; - if (dev->type != &i2c_adapter_type) return 0; - adapter = to_i2c_adapter(dev); - - /* Remove the devices we created ourselves as the result of hardware - * probing (using a driver's detect method) */ - list_for_each_entry_safe(client, _n, &driver->clients, detected) { - dev_dbg(&adapter->dev, "Removing %s at 0x%x\n", - client->name, client->addr); - list_del(&client->detected); - i2c_unregister_device(client); - } - - if (driver->detach_adapter) { - if (driver->detach_adapter(adapter)) - dev_err(&adapter->dev, - "detach_adapter failed for driver [%s]\n", - driver->driver.name); - } - - return 0; + return i2c_do_del_adapter(data, to_i2c_adapter(dev)); } /** @@ -917,7 +891,7 @@ static int __detach_adapter(struct device *dev, void *data) void i2c_del_driver(struct i2c_driver *driver) { mutex_lock(&core_lock); - bus_for_each_dev(&i2c_bus_type, NULL, driver, __detach_adapter); + bus_for_each_dev(&i2c_bus_type, NULL, driver, __process_removed_driver); mutex_unlock(&core_lock); driver_unregister(&driver->driver); |