diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 75 |
1 files changed, 40 insertions, 35 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index f236b34296ee..a18a251dabf9 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -46,6 +46,7 @@ static DEFINE_MUTEX(core_lock); static DEFINE_IDR(i2c_adapter_idr); static LIST_HEAD(userspace_devices); +static struct device_type i2c_client_type; static int i2c_check_addr(struct i2c_adapter *adapter, int addr); static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver); @@ -186,10 +187,10 @@ static void i2c_client_dev_release(struct device *dev) } static ssize_t -show_client_name(struct device *dev, struct device_attribute *attr, char *buf) +show_name(struct device *dev, struct device_attribute *attr, char *buf) { - struct i2c_client *client = to_i2c_client(dev); - return sprintf(buf, "%s\n", client->name); + return sprintf(buf, "%s\n", dev->type == &i2c_client_type ? + to_i2c_client(dev)->name : to_i2c_adapter(dev)->name); } static ssize_t @@ -199,7 +200,7 @@ show_modalias(struct device *dev, struct device_attribute *attr, char *buf) return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name); } -static DEVICE_ATTR(name, S_IRUGO, show_client_name, NULL); +static DEVICE_ATTR(name, S_IRUGO, show_name, NULL); static DEVICE_ATTR(modalias, S_IRUGO, show_modalias, NULL); static struct attribute *i2c_dev_attrs[] = { @@ -395,13 +396,6 @@ static void i2c_adapter_dev_release(struct device *dev) complete(&adap->dev_released); } -static ssize_t -show_adapter_name(struct device *dev, struct device_attribute *attr, char *buf) -{ - struct i2c_adapter *adap = to_i2c_adapter(dev); - return sprintf(buf, "%s\n", adap->name); -} - /* * Let users instantiate I2C devices through sysfs. This can be used when * platform initialization code doesn't contain the proper data for @@ -520,17 +514,28 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr, return res; } -static struct device_attribute i2c_adapter_attrs[] = { - __ATTR(name, S_IRUGO, show_adapter_name, NULL), - __ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device), - __ATTR(delete_device, S_IWUSR, NULL, i2c_sysfs_delete_device), - { }, +static DEVICE_ATTR(new_device, S_IWUSR, NULL, i2c_sysfs_new_device); +static DEVICE_ATTR(delete_device, S_IWUSR, NULL, i2c_sysfs_delete_device); + +static struct attribute *i2c_adapter_attrs[] = { + &dev_attr_name.attr, + &dev_attr_new_device.attr, + &dev_attr_delete_device.attr, + NULL +}; + +static struct attribute_group i2c_adapter_attr_group = { + .attrs = i2c_adapter_attrs, }; -static struct class i2c_adapter_class = { - .owner = THIS_MODULE, - .name = "i2c-adapter", - .dev_attrs = i2c_adapter_attrs, +static const struct attribute_group *i2c_adapter_attr_groups[] = { + &i2c_adapter_attr_group, + NULL +}; + +static struct device_type i2c_adapter_type = { + .groups = i2c_adapter_attr_groups, + .release = i2c_adapter_dev_release, }; static void i2c_scan_static_board_info(struct i2c_adapter *adapter) @@ -582,8 +587,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap) adap->timeout = HZ; dev_set_name(&adap->dev, "i2c-%d", adap->nr); - adap->dev.release = &i2c_adapter_dev_release; - adap->dev.class = &i2c_adapter_class; + adap->dev.bus = &i2c_bus_type; + adap->dev.type = &i2c_adapter_type; res = device_register(&adap->dev); if (res) goto out_list; @@ -795,9 +800,13 @@ EXPORT_SYMBOL(i2c_del_adapter); static int __attach_adapter(struct device *dev, void *data) { - struct i2c_adapter *adapter = to_i2c_adapter(dev); + 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 */ @@ -836,8 +845,7 @@ 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); - class_for_each_device(&i2c_adapter_class, NULL, driver, - __attach_adapter); + bus_for_each_dev(&i2c_bus_type, NULL, driver, __attach_adapter); mutex_unlock(&core_lock); return 0; @@ -846,10 +854,14 @@ EXPORT_SYMBOL(i2c_register_driver); static int __detach_adapter(struct device *dev, void *data) { - struct i2c_adapter *adapter = to_i2c_adapter(dev); + 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) { @@ -877,8 +889,7 @@ static int __detach_adapter(struct device *dev, void *data) void i2c_del_driver(struct i2c_driver *driver) { mutex_lock(&core_lock); - class_for_each_device(&i2c_adapter_class, NULL, driver, - __detach_adapter); + bus_for_each_dev(&i2c_bus_type, NULL, driver, __detach_adapter); mutex_unlock(&core_lock); driver_unregister(&driver->driver); @@ -967,16 +978,11 @@ static int __init i2c_init(void) retval = bus_register(&i2c_bus_type); if (retval) return retval; - retval = class_register(&i2c_adapter_class); - if (retval) - goto bus_err; retval = i2c_add_driver(&dummy_driver); if (retval) - goto class_err; + goto bus_err; return 0; -class_err: - class_unregister(&i2c_adapter_class); bus_err: bus_unregister(&i2c_bus_type); return retval; @@ -985,7 +991,6 @@ bus_err: static void __exit i2c_exit(void) { i2c_del_driver(&dummy_driver); - class_unregister(&i2c_adapter_class); bus_unregister(&i2c_bus_type); } |