diff options
Diffstat (limited to 'drivers/i2c')
| -rw-r--r-- | drivers/i2c/i2c-core.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 9b9d808578b..f75344ac466 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -764,17 +764,33 @@ int i2c_detach_client(struct i2c_client *client) } EXPORT_SYMBOL(i2c_detach_client); -int i2c_use_client(struct i2c_client *client) +/** + * i2c_use_client - increments the reference count of the i2c client structure + * @client: the client being referenced + * + * Each live reference to a client should be refcounted. The driver model does + * that automatically as part of driver binding, so that most drivers don't + * need to do this explicitly: they hold a reference until they're unbound + * from the device. + * + * A pointer to the client with the incremented reference counter is returned. + */ +struct i2c_client *i2c_use_client(struct i2c_client *client) { get_device(&client->dev); - return 0; + return client; } EXPORT_SYMBOL(i2c_use_client); -int i2c_release_client(struct i2c_client *client) +/** + * i2c_release_client - release a use of the i2c client structure + * @client: the client being no longer referenced + * + * Must be called when a user of a client is finished with it. + */ +void i2c_release_client(struct i2c_client *client) { put_device(&client->dev); - return 0; } EXPORT_SYMBOL(i2c_release_client); |