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EEPROMs (I2C)
Required properties:
- compatible: Must be a "<manufacturer>,<model>" pair. The following <model>
values are supported (assuming "atmel" as manufacturer):
"atmel,24c00",
"atmel,24c01",
"atmel,24c02",
"atmel,spd",
"atmel,24c04",
"atmel,24c08",
"atmel,24c16",
"atmel,24c32",
"atmel,24c64",
"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",
"ramtron",
"renesas",
"nxp",
"st",
Some vendors use different model names for chips which are just
variants of the above. Known such exceptions are listed below:
"renesas,r1ex24002" - the fallback is "atmel,24c02"
- 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>;
};
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