The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 # SPDX-License-Identifier: GPL-2.0-only
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/mtd/jedec,spi-nor.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: SPI NOR flash ST M25Pxx (and similar) serial flash chips
    8 
    9 maintainers:
   10   - Rob Herring <robh@kernel.org>
   11 
   12 allOf:
   13   - $ref: "mtd.yaml#"
   14   - $ref: /schemas/spi/spi-peripheral-props.yaml#
   15 
   16 properties:
   17   compatible:
   18     oneOf:
   19       - items:
   20           - pattern: "^((((micron|spansion|st),)?\
   21               (m25p(40|80|16|32|64|128)|\
   22               n25q(32b|064|128a11|128a13|256a|512a|164k)))|\
   23               atmel,at25df(321a|641|081a)|\
   24               everspin,mr25h(10|40|128|256)|\
   25               (mxicy|macronix),mx25l(4005a|1606e|6405d|8005|12805d|25635e)|\
   26               (mxicy|macronix),mx25u(4033|4035)|\
   27               (spansion,)?s25fl(128s|256s1|512s|008k|064k|164k)|\
   28               (sst|microchip),sst25vf(016b|032b|040b)|\
   29               (sst,)?sst26wf016b|\
   30               (sst,)?sst25wf(040b|080)|\
   31               winbond,w25x(80|32)|\
   32               (winbond,)?w25q(16|32(w|dw)?|64(dw)?|80bl|128(fw)?|256))$"
   33           - const: jedec,spi-nor
   34       - items:
   35           - enum:
   36               - issi,is25lp016d
   37               - micron,mt25qu02g
   38               - mxicy,mx25r1635f
   39               - mxicy,mx25u6435f
   40               - mxicy,mx25v8035f
   41               - spansion,s25sl12801
   42               - spansion,s25fs512s
   43           - const: jedec,spi-nor
   44       - const: jedec,spi-nor
   45     description:
   46       Must also include "jedec,spi-nor" for any SPI NOR flash that can be
   47       identified by the JEDEC READ ID opcode (0x9F).
   48 
   49   reg:
   50     minItems: 1
   51     maxItems: 2
   52 
   53   m25p,fast-read:
   54     type: boolean
   55     description:
   56       Use the "fast read" opcode to read data from the chip instead of the usual
   57       "read" opcode. This opcode is not supported by all chips and support for
   58       it can not be detected at runtime. Refer to your chips' datasheet to check
   59       if this is supported by your chip.
   60 
   61   broken-flash-reset:
   62     type: boolean
   63     description:
   64       Some flash devices utilize stateful addressing modes (e.g., for 32-bit
   65       addressing) which need to be managed carefully by a system. Because these
   66       sorts of flash don't have a standardized software reset command, and
   67       because some systems don't toggle the flash RESET# pin upon system reset
   68       (if the pin even exists at all), there are systems which cannot reboot
   69       properly if the flash is left in the "wrong" state. This boolean flag can
   70       be used on such systems, to denote the absence of a reliable reset
   71       mechanism.
   72 
   73   partitions:
   74     type: object
   75 
   76   '#address-cells': true
   77   '#size-cells': true
   78 
   79 patternProperties:
   80   # Note: use 'partitions' node for new users
   81   '^partition@':
   82     type: object
   83 
   84   "^otp(-[0-9]+)?$":
   85     type: object
   86 
   87 unevaluatedProperties: false
   88 
   89 examples:
   90   - |
   91     spi {
   92         #address-cells = <1>;
   93         #size-cells = <0>;
   94 
   95         flash@0 {
   96             compatible = "spansion,m25p80", "jedec,spi-nor";
   97             reg = <0>;
   98             spi-max-frequency = <40000000>;
   99             m25p,fast-read;
  100         };
  101     };
  102 ...

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