Commit 74ae3663 authored by Michael Walle's avatar Michael Walle Committed by Miquel Raynal
Browse files

dt-bindings: mtd: add OTP bindings 



Flash devices can have one-time-programmable regions. Add a nvmem
binding so they can be used as a nvmem provider.

Signed-off-by: default avatarMichael Walle <michael@walle.cc>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210424110608.15748-4-michael@walle.cc
parent e6aed671

Documentation/devicetree/bindings/mtd/mtd.yaml

+50 −0
Original line number Diff line number Diff line
@@ -21,6 +21,25 @@ properties: 
      based name) in order to ease flash device identification and/or

      describe what they are used for.



patternProperties:

  "^otp(-[0-9]+)?$":

    type: object

    $ref: ../nvmem/nvmem.yaml#



    description: |

      An OTP memory region. Some flashes provide a one-time-programmable

      memory whose content can either be programmed by a user or is already

      pre-programmed by the factory. Some flashes might provide both.



    properties:

      compatible:

        enum:

          - user-otp

          - factory-otp



    required:

      - compatible



additionalProperties: true



examples:
@@ -36,4 +55,35 @@ examples: 
        };

    };



  - |

    spi {

        #address-cells = <1>;

        #size-cells = <0>;



        flash@0 {

            reg = <0>;

            compatible = "jedec,spi-nor";



            otp-1 {

                compatible = "factory-otp";

                #address-cells = <1>;

                #size-cells = <1>;



                electronic-serial-number@0 {

                    reg = <0 8>;

                };

            };



            otp-2 {

                compatible = "user-otp";

                #address-cells = <1>;

                #size-cells = <1>;



                mac-address@0 {

                    reg = <0 6>;

                };

            };

        };

    };



...