diff options
| author | Ben Dooks | 2014-01-26 16:05:36 +0000 |
|---|---|---|
| committer | Wolfram Sang | 2014-01-26 22:48:35 +0100 |
| commit | 25ee33fb824eb46ae77f6c962007492603d39772 (patch) | |
| tree | 9dd4df79c15aaf3e6042d131899464b49cd54b79 /include/linux | |
| parent | bc8120f17ae87da0850b4e6a806ad88ffd01ca64 (diff) | |
i2c: update i2c_algorithm documentation
Add some kerneldoc style documentaton to the i2c_algorithm
structure, and point the master_xfer return codes at the
right place in Documentation/i2c/fault_codes
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/i2c.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/i2c.h b/include/linux/i2c.h index d9c8dbd3373f..deddeb8c337c 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -342,11 +342,25 @@ i2c_register_board_info(int busnum, struct i2c_board_info const *info, } #endif /* I2C_BOARDINFO */ -/* +/** + * struct i2c_algorithm - represent I2C transfer method + * @master_xfer: Issue a set of i2c transactions to the given I2C adapter + * defined by the msgs array, with num messages available to transfer via + * the adapter specified by adap. + * @smbus_xfer: Issue smbus transactions to the given I2C adapter. If this + * is not present, then the bus layer will try and convert the SMBus calls + * into I2C transfers instead. + * @functionality: Return the flags that this algorithm/adapter pair supports + * from the I2C_FUNC_* flags. + * * The following structs are for those who like to implement new bus drivers: * i2c_algorithm is the interface to a class of hardware solutions which can * be addressed using the same bus algorithms - i.e. bit-banging or the PCF8584 * to name two of the most common. + * + * The return codes from the @master_xfer field should indicate the type of + * error code that occured during the transfer, as documented in the kernel + * Documentation file Documentation/i2c/fault-codes. */ struct i2c_algorithm { /* If an adapter algorithm can't do I2C-level access, set master_xfer |