2015-12-11 13:08 GMT+01:00 Wolfram Sang <wsa@xxxxxxxxxxxxx>: > On Wed, Dec 02, 2015 at 11:25:17AM +0100, Bartosz Golaszewski wrote: >> Chips from the at24cs EEPROM series have an additional read-only memory area >> containing a factory pre-programmed serial number. In order to access it, a >> dummy write must be executed before reading the serial number bytes. > > Can't you instantiate a read-only EEPROM on this second address? Or a > seperate driver attaching to this address? What is the advantage of > having this in at24? > The regular memory area and serial number read-only block share the internal address pointer. We must ensure that there's no race conditions between normal EEPROM reads/writes and serial number reads. Best regards, Bartosz Golaszewski -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
