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authorJonathan Cameron <jic23@cam.ac.uk>2011-10-30 13:47:25 +0100
committerJean Delvare <khali@endymion.delvare>2011-10-30 13:47:25 +0100
commit06a67848c6681a73e621e47c056490d51a07289f (patch)
treedf6e3df869b7b1a1f40f09b9b3a6f8b8a2ad12d6 /Documentation/i2c
parent4403988afc0a92b8faf59b46f51d25fafaf0e63d (diff)
downloadlinux-linaro-stable-06a67848c6681a73e621e47c056490d51a07289f.tar.gz
i2c: Functions for byte-swapped smbus_write/read_word_data
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>
Diffstat (limited to 'Documentation/i2c')
-rw-r--r--Documentation/i2c/smbus-protocol8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/i2c/smbus-protocol b/Documentation/i2c/smbus-protocol
index 7c19d1a2bea0..49f5b680809d 100644
--- a/Documentation/i2c/smbus-protocol
+++ b/Documentation/i2c/smbus-protocol
@@ -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()
=============================================