Commit | Line | Data |
---|---|---|
d6ae0d57 | 1 | EEPROMs (SPI) compatible with Atmel at25. |
002176db APS |
2 | |
3 | Required properties: | |
4 | - compatible : "atmel,at25". | |
5 | - reg : chip select number | |
6 | - spi-max-frequency : max spi frequency to use | |
d6ae0d57 DD |
7 | - pagesize : size of the eeprom page |
8 | - size : total eeprom size in bytes | |
9 | - address-width : number of address bits (one of 8, 16, or 24) | |
002176db | 10 | |
d6ae0d57 DD |
11 | Optional properties: |
12 | - spi-cpha : SPI shifted clock phase, as per spi-bus bindings. | |
13 | - spi-cpol : SPI inverse clock polarity, as per spi-bus bindings. | |
14 | - read-only : this parameter-less property disables writes to the eeprom | |
15 | ||
16 | Obsolete legacy properties are can be used in place of "size", "pagesize", | |
17 | "address-width", and "read-only": | |
002176db APS |
18 | - at25,byte-len : total eeprom size in bytes |
19 | - at25,addr-mode : addr-mode flags, as defined in include/linux/spi/eeprom.h | |
20 | - at25,page-size : size of the eeprom page | |
21 | ||
d6ae0d57 DD |
22 | Additional compatible properties are also allowed. |
23 | ||
24 | Example: | |
25 | at25@0 { | |
26 | compatible = "atmel,at25", "st,m95256"; | |
27 | reg = <0> | |
28 | spi-max-frequency = <5000000>; | |
29 | spi-cpha; | |
30 | spi-cpol; | |
002176db | 31 | |
d6ae0d57 DD |
32 | pagesize = <64>; |
33 | size = <32768>; | |
34 | address-width = <16>; | |
35 | }; |