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i2c: slave-eeprom: Add comment about address handling 

The behaviour of the EEPROM in the case where we only send an 8bit
address to a 16bit address EEPROM is not defined. Added comment about
that the slave-eeprom might behave differently from how an actual device
does (only one model measured).

Reported-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Björn Ardö <bjorn.ardo@axis.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Björn Ardö 2019-09-05 16:50:26 +02:00 committed by Wolfram Sang
parent 41d529d622
commit fe050f9907
1 changed files with 6 additions and 0 deletions
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6
drivers/i2c/i2c-slave-eeprom.c
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@ -11,6 +11,12 @@
* pointer, yet implementation is deferred until the need actually arises. * pointer, yet implementation is deferred until the need actually arises.
*/ */
/*
* FIXME: What to do if only 8 bits of a 16 bit address are sent?
* The ST-M24C64 sends only 0xff then. Needs verification with other
* EEPROMs, though. We currently use the 8 bit as a valid address.
*/
#include <linux/bitfield.h> #include <linux/bitfield.h>
#include <linux/i2c.h> #include <linux/i2c.h>
#include <linux/init.h> #include <linux/init.h>