Commit a500528f authored by Julius Werner's avatar Julius Werner Committed by Krzysztof Kozlowski
Browse files

dt-bindings: memory: Add jedec,lpddr4 and jedec,lpddr5 bindings 



This patch adds bindings for LPDDR4 and LPDDR5 memory analogous to the
existing bindings for LPDDR2 and LPDDR3. For now, the new types are only
needed for topology description, so other properties like timing
parameters are omitted. They can be added later if needed.

Signed-off-by: default avatarJulius Werner <jwerner@chromium.org>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220930220606.303395-3-jwerner@chromium.org


Signed-off-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
parent 686fe63b

Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml

+4 −0
Original line number Diff line number Diff line
@@ -45,9 +45,13 @@ properties: 
      - 512

      - 1024

      - 2048

      - 3072

      - 4096

      - 6144

      - 8192

      - 12288

      - 16384

      - 24576

      - 32768



  io-width:

Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr4.yaml

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+35 −0
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr4.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: LPDDR4 SDRAM compliant to JEDEC JESD209-4



maintainers:

  - Krzysztof Kozlowski <krzk@kernel.org>



allOf:

  - $ref: jedec,lpddr-props.yaml#



properties:

  compatible:

    items:

      - pattern: "^lpddr4-[0-9a-f]{2},[0-9a-f]{4}$"

      - const: jedec,lpddr4



required:

  - compatible

  - density

  - io-width



unevaluatedProperties: false



examples:

  - |

    lpddr {

        compatible = "lpddr4-ff,0100", "jedec,lpddr4";

        density = <8192>;

        io-width = <16>;

        revision-id = <1 0>;

    };

Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr5.yaml

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+46 −0
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr5.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: LPDDR5 SDRAM compliant to JEDEC JESD209-5



maintainers:

  - Krzysztof Kozlowski <krzk@kernel.org>



allOf:

  - $ref: jedec,lpddr-props.yaml#



properties:

  compatible:

    items:

      - pattern: "^lpddr5-[0-9a-f]{2},[0-9a-f]{4}$"

      - const: jedec,lpddr5



  serial-id:

    $ref: /schemas/types.yaml#/definitions/uint32-array

    description:

      Serial IDs read from Mode Registers 47 through 54. One byte per uint32

      cell (i.e. <MR47 MR48 MR49 MR50 MR51 MR52 MR53 MR54>).

    maxItems: 8

    items:

      minimum: 0

      maximum: 255



required:

  - compatible

  - density

  - io-width



unevaluatedProperties: false



examples:

  - |

    lpddr {

        compatible = "lpddr5-01,0200", "jedec,lpddr5";

        density = <8192>;

        io-width = <8>;

        revision-id = <2 0>;

        serial-id = <3 1 0 0 0 0 0 0>;

    };