i2c-powermac: Reject unsupported I2C transactions

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The i2c-powermac driver doesn't support arbitrary multi-message I2C
transactions, only SMBus ones. Make it clear by returning an error if
a multi-message I2C transaction is attempted. This is better than only
processing the first message, because most callers won't recover from
the short transaction. Anyone wishing to issue multi-message
transactions should use the SMBus API instead of the raw I2C API.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Tested-by: Michel Daenzer <michel@daenzer.net>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>

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Jean Delvare 2009-12-06 17:06:17 +01:00

parent dddc66ffa0

commit 6f7e549f87

1 changed files with 6 additions and 0 deletions

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drivers/i2c/busses/i2c-powermac.c

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