From: Jean Delvare Date: Fri, 21 May 2010 16:40:57 +0000 (+0200) Subject: at24: Fall back to byte or word reads if needed X-Git-Tag: v2.6.35-rc1~457^2~8 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7aeb96642f70139a194d685b132605836f6f8dbb;p=pandora-kernel.git at24: Fall back to byte or word reads if needed Increase the portability of the at24 driver by letting it read from EEPROM chips connected to cheap SMBus controllers that support neither raw I2C messages nor even I2C block reads. All SMBus controllers should support either word reads or byte reads, so read support becomes universal, much like with the legacy "eeprom" driver. Obviously, this only works with EEPROM chips up to AT24C16, that use 8-bit offset addressing. 16-bit offset addressing is almost impossible to support on SMBus controllers. I did not add universal support for writes, as I had no immediate need for this, but it could be added later if needed (with the same performance issue as byte and word reads have, of course.) Signed-off-by: Jean Delvare Reviewed-by: Wolfram Sang Cc: Konstantin Lazarev --- Reading git-diff-tree failed