The bindings for different LPDDR versions mostly use the same kinds of properties, so in order to reduce duplication when we're adding support for more versions, this patch creates a new lpddr-props subschema that can be referenced by the others to define these common parts. (This will consider a few smaller I/O width and density numbers "legal" for LPDDR3 that are usually not used there, but this should be harmless.) This also un-deprecates the manufacturer ID property for LPDDR3 (and introduces it to LPDDR2), since it was found that having this information available in a separate property can be useful in some cases. Signed-off-by: Julius Werner <jwerner@xxxxxxxxxxxx> --- .../ddr/jedec,lpddr-props.yaml | 60 +++++++++++++++++++ .../memory-controllers/ddr/jedec,lpddr2.yaml | 40 ++----------- .../memory-controllers/ddr/jedec,lpddr3.yaml | 39 ++---------- 3 files changed, 68 insertions(+), 71 deletions(-) create mode 100644 Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml new file mode 100644 index 00000000000000..8b31c60ea2435b --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr-props.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr-props.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Common properties for LPDDR types + +description: + Different LPDDR types generally use the same properties and only differ in the + range of legal values for each. This file defines the common parts that can be + reused for each type. + +maintainers: + - Krzysztof Kozlowski <krzk@xxxxxxxxxx> + +properties: + manufacturer-id: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Manufacturer ID read from Mode Register 5. + minimum: 0 + maximum: 255 + + revision-id: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + Revision IDs read from Mode Register 6 and 7. One byte per uint32 cell (i.e. <MR6 MR7>). + minItems: 2 + maxItems: 2 + items: + minimum: 0 + maximum: 255 + + density: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Density in megabits of SDRAM chip. Decoded from Mode Register 8. + enum: + - 64 + - 128 + - 256 + - 512 + - 1024 + - 2048 + - 4096 + - 8192 + - 16384 + - 32768 + + io-width: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + IO bus width in bits of SDRAM chip. Decoded from Mode Register 8. + enum: + - 32 + - 16 + - 8 + +additionalProperties: true diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml index 9d78f140609b6c..63c47235cb9896 100644 --- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr2.yaml @@ -6,6 +6,9 @@ $schema: http://devicetree.org/meta-schemas/core.yaml# title: LPDDR2 SDRAM compliant to JEDEC JESD209-2 +allOf: + - $ref: "jedec,lpddr-props.yaml#" + maintainers: - Krzysztof Kozlowski <krzk@xxxxxxxxxx> @@ -41,41 +44,6 @@ properties: Property is deprecated, use revision-id instead. deprecated: true - revision-id: - $ref: /schemas/types.yaml#/definitions/uint32-array - description: | - Revision IDs read from Mode Register 6 and 7. One byte per uint32 cell (i.e. <MR6 MR7>). - minItems: 2 - maxItems: 2 - items: - minimum: 0 - maximum: 255 - - density: - $ref: /schemas/types.yaml#/definitions/uint32 - description: | - Density in megabits of SDRAM chip. Obtained from device datasheet. - enum: - - 64 - - 128 - - 256 - - 512 - - 1024 - - 2048 - - 4096 - - 8192 - - 16384 - - 32768 - - io-width: - $ref: /schemas/types.yaml#/definitions/uint32 - description: | - IO bus width in bits of SDRAM chip. Obtained from device datasheet. - enum: - - 32 - - 16 - - 8 - tRRD-min-tck: $ref: /schemas/types.yaml#/definitions/uint32 maximum: 16 @@ -168,7 +136,7 @@ required: - density - io-width -additionalProperties: false +unevaluatedProperties: false examples: - | diff --git a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml index 48908a19473c3f..5969166cdc9e0f 100644 --- a/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml @@ -6,6 +6,9 @@ $schema: http://devicetree.org/meta-schemas/core.yaml# title: LPDDR3 SDRAM compliant to JEDEC JESD209-3 +allOf: + - $ref: "jedec,lpddr-props.yaml#" + maintainers: - Krzysztof Kozlowski <krzk@xxxxxxxxxx> @@ -20,40 +23,6 @@ properties: const: 1 deprecated: true - density: - $ref: /schemas/types.yaml#/definitions/uint32 - description: | - Density in megabits of SDRAM chip. - enum: - - 4096 - - 8192 - - 16384 - - 32768 - - io-width: - $ref: /schemas/types.yaml#/definitions/uint32 - description: | - IO bus width in bits of SDRAM chip. - enum: - - 32 - - 16 - - manufacturer-id: - $ref: /schemas/types.yaml#/definitions/uint32 - description: | - Manufacturer ID value read from Mode Register 5. The property is - deprecated, manufacturer should be derived from the compatible. - deprecated: true - - revision-id: - $ref: /schemas/types.yaml#/definitions/uint32-array - minItems: 2 - maxItems: 2 - items: - maximum: 255 - description: | - Revision value of SDRAM chip read from Mode Registers 6 and 7. - '#size-cells': const: 0 deprecated: true @@ -206,7 +175,7 @@ required: - density - io-width -additionalProperties: false +unevaluatedProperties: false examples: - | -- 2.31.0
