EEPROMs (I2C)
Required properties:
compatible: Must be a “
, “ pair. The following values are supported (assuming "atmel" as manufacturer): "atmel,24c00", "atmel,24c01", "atmel,24cs01", "atmel,24c02", "atmel,24cs02", "atmel,24mac402", "atmel,24mac602", "atmel,spd", "atmel,24c04", "atmel,24cs04", "atmel,24c08", "atmel,24cs08", "atmel,24c16", "atmel,24cs16", "atmel,24c32", "atmel,24cs32", "atmel,24c64", "atmel,24cs64", "atmel,24c128", "atmel,24c256", "atmel,24c512", "atmel,24c1024", If <manufacturer> is not "atmel", then a fallback must be used with the same <model> and "atmel" as manufacturer. Example: compatible = "microchip,24c128", "atmel,24c128"; Supported manufacturers are: "catalyst", "microchip", "nxp", "ramtron", "renesas", "rohm", "st", Some vendors use different model names for chips which are just variants of the above. Known such exceptions are listed below: "nxp,se97b" - the fallback is "atmel,24c02", "renesas,r1ex24002" - the fallback is "atmel,24c02" "renesas,r1ex24128" - the fallback is "atmel,24c128" "rohm,br24t01" - the fallback is "atmel,24c01"reg: The I2C address of the EEPROM.
Optional properties:
pagesize: The length of the pagesize for writing. Please consult the
manual of your device, that value varies a lot. A wrong value may result in data loss! If not specified, a safety value of '1' is used which will be very slow.read-only: This parameterless property disables writes to the eeprom.
size: Total eeprom size in bytes.
no-read-rollover: This parameterless property indicates that the
multi-address eeprom does not automatically roll over reads to the next slave address. Please consult the manual of your device.wp-gpios: GPIO to which the write-protect pin of the chip is connected.
Example:
eeprom@52 {
compatible = “atmel,24c32”;
reg = <0x52>;
pagesize = <32>;
wp-gpios = <&gpio1 3 0>;
};
