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i2c: Functions for byte-swapped smbus_write/read_word_data

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Reimplemented at least 17 times discounting error mangling cases
where it could be used.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Jonathan Cameron 2011-10-30 13:47:25 +01:00 • committed by Jean Delvare
parent 4403988afc
commit 06a67848c6
2 changed files with 25 additions and 0 deletions
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8
Documentation/i2c/smbus-protocol
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@ -88,6 +88,10 @@ byte. But this time, the data is a complete word (16 bits).
S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P
Note the convenience function i2c_smbus_read_word_swapped is
available for reads where the two data bytes are the other way
around (not SMBus compliant, but very popular.)
SMBus Write Byte: i2c_smbus_write_byte_data()
==============================================
@ -108,6 +112,10 @@ specified through the Comm byte.
S Addr Wr [A] Comm [A] DataLow [A] DataHigh [A] P
Note the convenience function i2c_smbus_write_word_swapped is
available for writes where the two data bytes are the other way
around (not SMBus compliant, but very popular.)
SMBus Process Call: i2c_smbus_process_call()
=============================================