i2c: xlp9xx: Check for Bus state before every transfer

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I2C bus enters the STOP condition after the DATA_DONE interrupt is raised.
Essentially the driver should be checking the bus state before sending
any transaction. In case a transaction is initiated while the
bus is busy, the prior transaction's stop condition is not achieved.
Add the check to make sure the bus is not busy before every transaction.

Signed-off-by: George Cherian <george.cherian@cavium.com>
Reviewed-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

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George Cherian 2018-02-27 13:26:18 +00:00 • committed by Wolfram Sang

parent 7a20e707aa

commit d3898a7852

1 changed files with 32 additions and 0 deletions

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drivers/i2c/busses/i2c-xlp9xx.c

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