Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/memory-controllers/ddr/jedec,lpddr3.yaml
Extension
.yaml
Size
6623 bytes
Lines
244
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr3.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: LPDDR3 SDRAM compliant to JEDEC JESD209-3

maintainers:
  - Krzysztof Kozlowski <krzk@kernel.org>

allOf:
  - $ref: jedec,sdram-props.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - samsung,K3QF2F20DB
          - const: jedec,lpddr3
      - items:
          - pattern: "^lpddr3-[0-9a-f]{2},[0-9a-f]{4}$"
          - const: jedec,lpddr3

  '#address-cells':
    const: 1
    deprecated: true

  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

  '#size-cells':
    const: 0
    deprecated: true

  tCKE-min-tck:
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 15
    description: |
      CKE minimum pulse width (HIGH and LOW pulse width) in terms of number
      of clock cycles.

  tCKESR-min-tck:
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 15
    description: |
      CKE minimum pulse width during SELF REFRESH (low pulse width during
      SELF REFRESH) in terms of number of clock cycles.

  tDQSCK-min-tck:
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 15
    description: |
      DQS output data access time from CK_t/CK_c in terms of number of clock
      cycles.

  tFAW-min-tck:
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 63
    description: |
      Four-bank activate window in terms of number of clock cycles.

  tMRD-min-tck:
    $ref: /schemas/types.yaml#/definitions/uint32
    maximum: 15

Annotation

Implementation Notes