tree 4c4b2f5ed0b474e3641be7d5979277c4df5e2f6a
parent 14a6ff2c4f22010e5d67f25508f09e3b53a1f1c4
author mario.six@gdsys.cc <mario.six@gdsys.cc> 1469095031 +0200
committer Heiko Schocher <hs@denx.de> 1469521219 +0200

i2c: mvtwsi: Handle zero-length offsets properly

Zero-length offsets are not properly handled by the driver. When a read
operation with a zero-length offset is started, a START condition is
asserted, and since no offset bytes are transferred, a repeated START is
issued immediately after, which confuses the controller.

To fix this, we send the first START only if any address bytes need to
be sent, and keep track of the expected start status accordingly.

Signed-off-by: Mario Six <mario.six@gdsys.cc>
Reviewed-by: Stefan Roese <sr@denx.de>