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| author | Michael Walle <michael@walle.cc> | 2021-04-24 13:06:06 +0200 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2021-05-10 12:42:51 +0200 |
| commit | 74ae3663b110d8d3e5d41dd4b05f4fa6bd79d49d (patch) | |
| tree | afbbfce69e75d7093e8cb36dda67afcea95f27fd | |
| parent | e6aed6717cd429a48995d2c6533fdde9f88d8cf1 (diff) | |
| download | linux-74ae3663b110d8d3e5d41dd4b05f4fa6bd79d49d.tar.bz2 | |
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: Michael Walle <michael@walle.cc>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210424110608.15748-4-michael@walle.cc
| -rw-r--r-- | Documentation/devicetree/bindings/mtd/mtd.yaml | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mtd/mtd.yaml b/Documentation/devicetree/bindings/mtd/mtd.yaml index 086b0ecd1604..376b679cfc70 100644 --- a/Documentation/devicetree/bindings/mtd/mtd.yaml +++ b/Documentation/devicetree/bindings/mtd/mtd.yaml @@ -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>; + }; + }; + }; + }; + ... |