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authorLuca Ceresoli <luca@lucaceresoli.net>2020-01-29 16:19:44 +0100
committerWolfram Sang <wsa@the-dreams.de>2020-01-29 22:01:49 +0100
commit95b83774e310fa5ef8fc60434ac55fe3dc375adc (patch)
tree0518b75e3389f8b9f6825ae73dd9ae7fd6f30e50
parentc7148b059c2f88b2b70325cfe45a3271f5c16c43 (diff)
docs: i2c: smbus-protocol: improve I2C Block transactions description
Clarify from the beginning what these transactions are, and specifically how they differ from the SMBus counterparts, i.e. the lack of a Count byte. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
-rw-r--r--Documentation/i2c/smbus-protocol.rst7
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/i2c/smbus-protocol.rst b/Documentation/i2c/smbus-protocol.rst
index 7350e4b2c2fa..0edaf6069ac1 100644
--- a/Documentation/i2c/smbus-protocol.rst
+++ b/Documentation/i2c/smbus-protocol.rst
@@ -282,9 +282,10 @@ This is implemented the following way in the Linux kernel:
I2C Block Transactions
======================
-The following I2C block transactions are supported by the
-SMBus layer and are described here for completeness.
-They are *NOT* defined by the SMBus specification.
+The following I2C block transactions are similar to the SMBus Block Read
+and Write operations, except these do not have a Count byte. They are
+supported by the SMBus layer and are described here for completeness, but
+they are *NOT* defined by the SMBus specification.
I2C block transactions do not limit the number of bytes transferred
but the SMBus layer places a limit of 32 bytes.