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                  mr25h128
  17                  mr25h256
  18                  mr25h10
  19                  mr25h40
  20                  mx25l4005a
  21                  mx25l1606e
  22                  mx25l6405d
  23                  mx25l12805d
  24                  mx25l25635e
  25                  n25q064
  26                  n25q128a11
  27                  n25q128a13
  28                  n25q512a
  29                  s25fl256s1
  30                  s25fl512s
  31                  s25sl12801
  32                  s25fl008k
  33                  s25fl064k
  34                  sst25vf040b
  35                  m25p40
  36                  m25p80
  37                  m25p16
  38                  m25p32
  39                  m25p64
  40                  m25p128
  41                  w25x80
  42                  w25x32
  43                  w25q32
  44                  w25q64
  45                  w25q32dw
  46                  w25q80bl
  47                  w25q128
  48                  w25q256
  49
  50                The following chip names have been used historically to
  51                designate quirky versions of flash chips that do not support the
  52                JEDEC READ ID opcode (0x9F):
  53                  m25p05-nonjedec
  54                  m25p10-nonjedec
  55                  m25p20-nonjedec
  56                  m25p40-nonjedec
  57                  m25p80-nonjedec
  58                  m25p16-nonjedec
  59                  m25p32-nonjedec
  60                  m25p64-nonjedec
  61                  m25p128-nonjedec
  62
  63 - reg : Chip-Select number
  64 - spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
  65
  66 Optional properties:
  67 - m25p,fast-read : Use the "fast read" opcode to read data from the chip instead
  68                    of the usual "read" opcode. This opcode is not supported by
  69                    all chips and support for it can not be detected at runtime.
  70                    Refer to your chips' datasheet to check if this is supported
  71                    by your chip.
  72 - broken-flash-reset : Some flash devices utilize stateful addressing modes
  73                    (e.g., for 32-bit addressing) which need to be managed
  74                    carefully by a system. Because these sorts of flash don't
  75                    have a standardized software reset command, and because some
  76                    systems don't toggle the flash RESET# pin upon system reset
  77                    (if the pin even exists at all), there are systems which
  78                    cannot reboot properly if the flash is left in the "wrong"
  79                    state. This boolean flag can be used on such systems, to
  80                    denote the absence of a reliable reset mechanism.
  81
  82 Example:
  83
  84         flash: m25p80@0 {
  85                 #address-cells = <1>;
  86                 #size-cells = <1>;
  87                 compatible = "spansion,m25p80", "jedec,spi-nor";
  88                 reg = <0>;
  89                 spi-max-frequency = <40000000>;
  90                 m25p,fast-read;
  91         };