86 lines
2.7 KiB
Plaintext
86 lines
2.7 KiB
Plaintext
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,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",
|
|
"atmel,24c2048",
|
|
|
|
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.
|
|
|
|
- address-width: number of address bits (one of 8, 16).
|
|
|
|
Example:
|
|
|
|
eeprom@52 {
|
|
compatible = "atmel,24c32";
|
|
reg = <0x52>;
|
|
pagesize = <32>;
|
|
wp-gpios = <&gpio1 3 0>;
|
|
};
|