Jean Delvare 1b4dff9cd3 i2c/eeprom: Fall back to SMBus read word transactions ... When I2C block reads are not supported by the underlying adapter, use SMBus read word transactions instead of consecutive byte reads. Reasons for this change are: * The consecutive byte read approach is not safe on multi-master buses. * While consecutive byte reads have less overhead if you only count the bytes on the bus, it takes more than twice as many transactions as with SMBus read word transactions, and each transaction has a cost: taking and releasing the adapter mutex, and for polling drivers, waiting for the transaction to complete. This change yields a significant performance boost at HZ=250 with EEPROMs on an Intel 82801 bus (basically twice as fast.) SMBus read word transactions are widely supported so I don't expect compatibility issues. Signed-off-by: Jean Delvare <khali@linux-fr.org>		2008-07-14 22:38:29 +02:00
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algos	i2c-pca-algo: Fix error code	2008-07-14 22:38:26 +02:00
busses	i2c: Let bus drivers add SPD to their class	2008-07-14 22:38:29 +02:00
chips	i2c/eeprom: Fall back to SMBus read word transactions	2008-07-14 22:38:29 +02:00
i2c-boardinfo.c
i2c-core.c	i2c: Simplify i2c_del_driver()	2008-07-14 22:38:26 +02:00
i2c-core.h
i2c-dev.c	i2c: Push ioctl BKL down into the i2c code	2008-07-14 22:38:27 +02:00
Kconfig
Makefile