> The notion of "slow" seems a bit arbitrary to me. Is there some other
> technical reason or gotcha hiding here that you know of?
$ git show 7aeb96642f70139a194d685b132605836f6f8dbb
commit 7aeb96642f70139a194d685b132605836f6f8dbb
Author: Jean Delvare <khali@xxxxxxxxxxxx>
Date: Fri May 21 18:40:57 2010 +0200
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 <khali@xxxxxxxxxxxx>
Reviewed-by: Wolfram Sang <w.sang@xxxxxxxxxxxxxx>
Cc: Konstantin Lazarev <klazarev@xxxxxxxxxxxxx>
> Would a nicely written patch that adds write support for this case be
> acceptable? I have not written it yet, but would like to.
Yes, it would.
All the best,
Wolfram
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