Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/clock/marvell,armada-3700-uart-clock.yaml
Extension
.yaml
Size
1600 bytes
Lines
60
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.

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Annotated Snippet

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/marvell,armada-3700-uart-clock.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Marvell Armada 3720 UART clocks

maintainers:
  - Pali Rohár <pali@kernel.org>

properties:
  compatible:
    const: marvell,armada-3700-uart-clock

  reg:
    items:
      - description: UART Clock Control Register
      - description: UART 2 Baud Rate Divisor Register

  clocks:
    description: |
      List of parent clocks suitable for UART from following set:
        "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal"
      UART clock can use one from this set and when more are provided
      then kernel would choose and configure the most suitable one.
      It is suggest to specify at least one TBG clock to achieve
      baudrates above 230400 and also to specify clock which bootloader
      used for UART (most probably xtal) for smooth boot log on UART.

  clock-names:
    items:
      - const: TBG-A-P
      - const: TBG-B-P
      - const: TBG-A-S
      - const: TBG-B-S
      - const: xtal
    minItems: 1

  '#clock-cells':
    const: 1

required:
  - compatible
  - reg
  - clocks
  - clock-names
  - '#clock-cells'

additionalProperties: false

examples:
  - |
    uartclk: clock-controller@12010 {
      compatible = "marvell,armada-3700-uart-clock";
      reg = <0x12010 0x4>, <0x12210 0x4>;
      clocks = <&tbg 0>, <&tbg 1>, <&tbg 2>, <&tbg 3>, <&xtalclk>;
      clock-names = "TBG-A-P", "TBG-B-P", "TBG-A-S", "TBG-B-S", "xtal";
      #clock-cells = <1>;
    };

Annotation

Implementation Notes