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Diffstat (limited to 'Documentation/devicetree/bindings/eeprom/at25.txt')
-rw-r--r-- | Documentation/devicetree/bindings/eeprom/at25.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/eeprom/at25.txt b/Documentation/devicetree/bindings/eeprom/at25.txt new file mode 100644 index 0000000..1d34471 --- /dev/null +++ b/Documentation/devicetree/bindings/eeprom/at25.txt @@ -0,0 +1,35 @@ +EEPROMs (SPI) compatible with Atmel at25. + +Required properties: +- compatible : "atmel,at25". +- reg : chip select number +- spi-max-frequency : max spi frequency to use +- pagesize : size of the eeprom page +- size : total eeprom size in bytes +- address-width : number of address bits (one of 8, 16, or 24) + +Optional properties: +- spi-cpha : SPI shifted clock phase, as per spi-bus bindings. +- spi-cpol : SPI inverse clock polarity, as per spi-bus bindings. +- read-only : this parameter-less property disables writes to the eeprom + +Obsolete legacy properties are can be used in place of "size", "pagesize", +"address-width", and "read-only": +- at25,byte-len : total eeprom size in bytes +- at25,addr-mode : addr-mode flags, as defined in include/linux/spi/eeprom.h +- at25,page-size : size of the eeprom page + +Additional compatible properties are also allowed. + +Example: + at25@0 { + compatible = "atmel,at25", "st,m95256"; + reg = <0> + spi-max-frequency = <5000000>; + spi-cpha; + spi-cpol; + + pagesize = <64>; + size = <32768>; + address-width = <16>; + }; |