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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 07:56:20 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-30 07:56:20 +0400 |
| commit | f7a6ad9fa24e4511a143e2b7b8a0d55864fe2edf (patch) | |
| tree | c8bdb1a08729439fc8846c024ded296b9ef3b988 /include | |
| parent | 9076e0cae70c5d6ddb9a0284a20885b2b8814416 (diff) | |
| parent | 6ff4b105163223741f5a82804f9695221017ae42 (diff) | |
| download | linux-f7a6ad9fa24e4511a143e2b7b8a0d55864fe2edf.tar.xz | |
Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull more i2c updates from Wolfram Sang:
"Mostly bugfixes, small but wanted cleanups, and Paul's init.h removal
applied"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: rcar: fix NACK error code
i2c: update i2c_algorithm documentation
i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted
i2c: rcar: do not print error if device nacks transfer
i2c: rely on driver core when sanitizing devices
i2c: delete non-required instances of include <linux/init.h>
i2c: acorn: is tristate and should use module.h
i2c: piix4: Standardize log messages
i2c: piix4: Use different message for AMD Auxiliary SMBus Controller
i2c: piix4: Add support for AMD ML and CZ SMBus changes
Diffstat (limited to 'include')
| -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 |