at25.yaml

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    1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
    2 %YAML 1.2
    3 ---
    4 $id: "http://devicetree.org/schemas/eeprom/at25.yaml#"
    5 $schema: "http://devicetree.org/meta-schemas/core.yaml#"
    6 
    7 title: SPI EEPROMs or FRAMs compatible with Atmel's AT25
    8 
    9 maintainers:
   10   - Christian Eggers <ceggers@arri.de>
   11 
   12 properties:
   13   $nodename:
   14     anyOf:
   15       - pattern: "^eeprom@[0-9a-f]{1,2}$"
   16       - pattern: "^fram@[0-9a-f]{1,2}$"
   17 
   18   # There are multiple known vendors who manufacture EEPROM chips compatible
   19   # with Atmel's AT25. The compatible string requires two items where the
   20   # 'vendor' and 'model' parts of the first are the actual chip and the second
   21   # item is fixed to "atmel,at25". Some existing bindings only have the
   22   # "atmel,at25" part and should be fixed by somebody who knows vendor and
   23   # product.
   24   compatible:
   25     oneOf:
   26       - items:
   27           - enum:
   28               - anvo,anv32e61w
   29               - atmel,at25256B
   30               - fujitsu,mb85rs1mt
   31               - fujitsu,mb85rs64
   32               - microchip,at25160bn
   33               - microchip,25lc040
   34               - st,m95m02
   35               - st,m95256
   36               - cypress,fm25
   37 
   38           - const: atmel,at25
   39 
   40       # Please don't use this alternative for new bindings.
   41       - items:
   42           - const: atmel,at25
   43 
   44   reg:
   45     maxItems: 1
   46 
   47   pagesize:
   48     $ref: /schemas/types.yaml#/definitions/uint32
   49     enum: [1, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536, 131072]
   50     description:
   51       Size of the eeprom page. FRAMs don't have pages.
   52 
   53   size:
   54     $ref: /schemas/types.yaml#/definitions/uint32
   55     description:
   56       Total eeprom size in bytes.
   57 
   58   address-width:
   59     $ref: /schemas/types.yaml#/definitions/uint32
   60     enum: [ 8, 9, 16, 24 ]
   61     description:
   62       Number of address bits.
   63       For 9 bits, the MSB of the address is sent as bit 3 of the instruction
   64       byte, before the address byte.
   65 
   66   spi-cpha: true
   67 
   68   spi-cpol: true
   69 
   70   read-only:
   71     description:
   72       Disable writes to the eeprom.
   73     type: boolean
   74 
   75   wp-gpios:
   76     maxItems: 1
   77     description:
   78       GPIO to which the write-protect pin of the chip is connected.
   79 
   80   # Deprecated: at25,byte-len, at25,addr-mode, at25,page-size
   81   at25,byte-len:
   82     $ref: /schemas/types.yaml#/definitions/uint32
   83     description:
   84       Total eeprom size in bytes. Deprecated, use "size" property instead.
   85     deprecated: true
   86 
   87   at25,addr-mode:
   88     $ref: /schemas/types.yaml#/definitions/uint32
   89     description:
   90       Addr-mode flags, as defined in include/linux/spi/eeprom.h.
   91       Deprecated, use "address-width" property instead.
   92     deprecated: true
   93 
   94   at25,page-size:
   95     $ref: /schemas/types.yaml#/definitions/uint32
   96     description:
   97       Size of the eeprom page. Deprecated, use "pagesize" property instead.
   98     deprecated: true
   99 
  100 required:
  101   - compatible
  102   - reg
  103   - spi-max-frequency
  104 
  105 allOf:
  106   - $ref: /schemas/spi/spi-peripheral-props.yaml#
  107   - if:
  108       properties:
  109         compatible:
  110           not:
  111             contains:
  112               const: cypress,fm25
  113     then:
  114       required:
  115         - pagesize
  116         - size
  117         - address-width
  118 
  119 unevaluatedProperties: false
  120 
  121 examples:
  122   - |
  123     #include <dt-bindings/gpio/gpio.h>
  124     spi0 {
  125         #address-cells = <1>;
  126         #size-cells = <0>;
  127 
  128         eeprom@0 {
  129             compatible = "st,m95256", "atmel,at25";
  130             reg = <0>;
  131             spi-max-frequency = <5000000>;
  132             spi-cpha;
  133             spi-cpol;
  134             wp-gpios = <&gpio1 3 0>;
  135 
  136             pagesize = <64>;
  137             size = <32768>;
  138             address-width = <16>;
  139         };
  140 
  141         fram@1 {
  142             compatible = "cypress,fm25", "atmel,at25";
  143             reg = <1>;
  144             spi-max-frequency = <40000000>;
  145         };
  146     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/eeprom/at25.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/eeprom/at25.yaml