Documentation/devicetree/bindings/mtd/jedec,spi-nor.txt

   1 * SPI NOR flash: ST M25Pxx (and similar) serial flash chips
   2
   3 Required properties:
   4 - #address-cells, #size-cells : Must be present if the device has sub-nodes
   5   representing partitions.
   6 - compatible : May include a device-specific string consisting of the
   7                manufacturer and name of the chip. A list of supported chip
   8                names follows.
   9                Must also include "jedec,spi-nor" for any SPI NOR flash that can
  10                be identified by the JEDEC READ ID opcode (0x9F).
  11
  12                Supported chip names:
  13                  at25df321a
  14                  at25df641
  15                  at26df081a
  16                  en25s64
  17                  mr25h128
  18                  mr25h256
  19                  mr25h10
  20                  mr25h40
  21                  mx25l4005a
  22                  mx25l1606e
  23                  mx25l6405d
  24                  mx25l12805d
  25                  mx25l25635e
  26                  n25q064
  27                  n25q128a11
  28                  n25q128a13
  29                  n25q512a
  30                  s25fl256s1
  31                  s25fl512s
  32                  s25sl12801
  33                  s25fl008k
  34                  s25fl064k
  35                  sst25vf040b
  36                  sst25wf040b
  37                  m25p40
  38                  m25p80
  39                  m25p16
  40                  m25p32
  41                  m25p64
  42                  m25p128
  43                  w25x80
  44                  w25x32
  45                  w25q32
  46                  w25q64
  47                  w25q32dw
  48                  w25q80bl
  49                  w25q128
  50                  w25q256
  51
  52                The following chip names have been used historically to
  53                designate quirky versions of flash chips that do not support the
  54                JEDEC READ ID opcode (0x9F):
  55                  m25p05-nonjedec
  56                  m25p10-nonjedec
  57                  m25p20-nonjedec
  58                  m25p40-nonjedec
  59                  m25p80-nonjedec
  60                  m25p16-nonjedec
  61                  m25p32-nonjedec
  62                  m25p64-nonjedec
  63                  m25p128-nonjedec
  64
  65 - reg : Chip-Select number
  66 - spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
  67
  68 Optional properties:
  69 - m25p,fast-read : Use the "fast read" opcode to read data from the chip instead
  70                    of the usual "read" opcode. This opcode is not supported by
  71                    all chips and support for it can not be detected at runtime.
  72                    Refer to your chips' datasheet to check if this is supported
  73                    by your chip.
  74
  75 Example:
  76
  77         flash: m25p80@0 {
  78                 #address-cells = <1>;
  79                 #size-cells = <1>;
  80                 compatible = "spansion,m25p80", "jedec,spi-nor";
  81                 reg = <0>;
  82                 spi-max-frequency = <40000000>;
  83                 m25p,fast-read;
  84         };