seeprom(4) - NetBSD Manual Pages

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SEEPROM(4)              NetBSD Kernel Interfaces Manual             SEEPROM(4)


NAME

     seeprom -- 24-series I2C EEPROM driver


SYNOPSIS

     seeprom0 at iic0 addr 0x51: AT24Cxx or compatible EEPROM: size 256
     seeprom16 at iic1 addr 0x57: power-supply: size 8192


DESCRIPTION

     The seeprom driver provides support for the ATMEL 24-series of I2C EEP-
     ROMs, and compatibles, available from a variety of vendors.  The Philips
     PCF8582 is also supported, as compatible with the AT24C02.

     Access to the contents of the memory is through a character device.

     The size of the EEPROM is either read from the firmware, or can be set
     using the flags keyword in the kernel configuration.  The value of the
     flag represents the EEPROM size in Kbit.

           flags    EEPROM size in bytes
           1        128
           2        256
           4        512
           8        1024
           16       2048
           32       4096
           64       8192
           128      16384
           256      32768
           512      65536


EXAMPLES

     Indirect configuration:
           seeprom* at iic? addr 0x51 flags 0x2
     Direct configuration:
           seeprom* at iic? addr?


SEE ALSO

     iic(4)


HISTORY

     The seeprom device appeared in NetBSD 2.0.


BUGS

     AT24C1024 EEPROM's are not supported.

     Software write protection on the AT34Cxx EEPROMs is not supported.

     The seeprom driver reads and writes one byte at a time to be compatible
     with all controllers.

NetBSD 9.1                     October 25, 2013                     NetBSD 9.1