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Diffstat (limited to 'include/linux/i2c.h')
-rw-r--r--include/linux/i2c.h19
1 files changed, 13 insertions, 6 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index cae7d618030..2eaba21b9b1 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -90,7 +90,7 @@ extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
const u8 *values);
/* Returns the number of read bytes */
extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
- u8 command, u8 *values);
+ u8 command, u8 length, u8 *values);
extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
u8 command, u8 length,
const u8 *values);
@@ -150,15 +150,20 @@ struct i2c_driver {
/**
* struct i2c_client - represent an I2C slave device
+ * @flags: I2C_CLIENT_TEN indicates the device uses a ten bit chip address;
+ * I2C_CLIENT_PEC indicates it uses SMBus Packet Error Checking
* @addr: Address used on the I2C bus connected to the parent adapter.
* @name: Indicates the type of the device, usually a chip name that's
* generic enough to hide second-sourcing and compatible revisions.
+ * @adapter: manages the bus segment hosting this I2C device
* @dev: Driver model device node for the slave.
+ * @irq: indicates the IRQ generated by this device (if any)
* @driver_name: Identifies new-style driver used with this device; also
* used as the module name for hotplug/coldplug modprobe support.
*
* An i2c_client identifies a single device (i.e. chip) connected to an
- * i2c bus. The behaviour is defined by the routines of the driver.
+ * i2c bus. The behaviour exposed to Linux is defined by the driver
+ * managing the device.
*/
struct i2c_client {
unsigned short flags; /* div., see below */
@@ -180,7 +185,8 @@ struct i2c_client {
static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
{
- return to_i2c_client(container_of(kobj, struct device, kobj));
+ struct device * const dev = container_of(kobj, struct device, kobj);
+ return to_i2c_client(dev);
}
static inline void *i2c_get_clientdata (struct i2c_client *dev)
@@ -201,7 +207,7 @@ static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
* @addr: stored in i2c_client.addr
* @platform_data: stored in i2c_client.dev.platform_data
* @irq: stored in i2c_client.irq
-
+ *
* I2C doesn't actually support hardware probing, although controllers and
* devices may be able to use I2C_SMBUS_QUICK to tell whether or not there's
* a device at a given address. Drivers commonly need more information than
@@ -210,7 +216,7 @@ static inline void i2c_set_clientdata (struct i2c_client *dev, void *data)
* i2c_board_info is used to build tables of information listing I2C devices
* that are present. This information is used to grow the driver model tree
* for "new style" I2C drivers. For mainboards this is done statically using
- * i2c_register_board_info(), where @bus_num represents an adapter that isn't
+ * i2c_register_board_info(); bus numbers identify adapters that aren't
* yet available. For add-on boards, i2c_new_device() does this dynamically
* with the adapter already known.
*/
@@ -518,8 +524,9 @@ union i2c_smbus_data {
#define I2C_SMBUS_WORD_DATA 3
#define I2C_SMBUS_PROC_CALL 4
#define I2C_SMBUS_BLOCK_DATA 5
-#define I2C_SMBUS_I2C_BLOCK_DATA 6
+#define I2C_SMBUS_I2C_BLOCK_BROKEN 6
#define I2C_SMBUS_BLOCK_PROC_CALL 7 /* SMBus 2.0 */
+#define I2C_SMBUS_I2C_BLOCK_DATA 8
/* ----- commands for the ioctl like i2c_command call: