Documentation/devicetree/bindings/eeprom/at25.txt

   1 EEPROMs (SPI) compatible with Atmel at25.
   2
   3 Required properties:
   4 - compatible : Should be "<vendor>,<type>", and generic value "atmel,at25".
   5   Example "<vendor>,<type>" values:
   6     "microchip,25lc040"
   7     "st,m95m02"
   8     "st,m95256"
   9
  10 - reg : chip select number
  11 - spi-max-frequency : max spi frequency to use
  12 - pagesize : size of the eeprom page
  13 - size : total eeprom size in bytes
  14 - address-width : number of address bits (one of 8, 16, or 24)
  15
  16 Optional properties:
  17 - spi-cpha : SPI shifted clock phase, as per spi-bus bindings.
  18 - spi-cpol : SPI inverse clock polarity, as per spi-bus bindings.
  19 - read-only : this parameter-less property disables writes to the eeprom
  20
  21 Obsolete legacy properties can be used in place of "size", "pagesize",
  22 "address-width", and "read-only":
  23 - at25,byte-len : total eeprom size in bytes
  24 - at25,addr-mode : addr-mode flags, as defined in include/linux/spi/eeprom.h
  25 - at25,page-size : size of the eeprom page
  26
  27 Additional compatible properties are also allowed.
  28
  29 Example:
  30         eeprom@0 {
  31                 compatible = "st,m95256", "atmel,at25";
  32                 reg = <0>
  33                 spi-max-frequency = <5000000>;
  34                 spi-cpha;
  35                 spi-cpol;
  36
  37                 pagesize = <64>;
  38                 size = <32768>;
  39                 address-width = <16>;
  40         };