aboutsummaryrefslogtreecommitdiff
path: root/include/linux/i2c.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 02fc617782e..0a5da639b32 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -53,6 +53,7 @@ struct i2c_board_info;
* on a bus (or read from them). Apart from two basic transfer functions to
* transmit one message at a time, a more complex version can be used to
* transmit an arbitrary number of messages without interruption.
+ * @count must be be less than 64k since msg.len is u16.
*/
extern int i2c_master_send(struct i2c_client *client, const char *buf,
int count);
@@ -152,6 +153,13 @@ struct i2c_driver {
int (*suspend)(struct i2c_client *, pm_message_t mesg);
int (*resume)(struct i2c_client *);
+ /* Alert callback, for example for the SMBus alert protocol.
+ * The format and meaning of the data value depends on the protocol.
+ * For the SMBus alert protocol, there is a single bit of data passed
+ * as the alert response's low bit ("event flag").
+ */
+ void (*alert)(struct i2c_client *, unsigned int data);
+
/* a ioctl like command that can be used to perform specific functions
* with the device.
*/