jedec,spi-nor.txt

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    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         };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/mtd/jedec,spi-nor.txt

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sys/contrib/device-tree/Bindings/mtd/jedec,spi-nor.txt