xref: /openbmc/linux/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml (revision ba085a8d)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/i2c-mpc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: I2C-Bus adapter for MPC824x/83xx/85xx/86xx/512x/52xx SoCs

maintainers:
  - Chris Packham <chris.packham@alliedtelesis.co.nz>

allOf:
  - $ref: /schemas/i2c/i2c-controller.yaml#

properties:
  compatible:
    oneOf:
      - items:
          - enum:
              - mpc5200-i2c
              - fsl,mpc5200-i2c
              - fsl,mpc5121-i2c
              - fsl,mpc8313-i2c
              - fsl,mpc8543-i2c
              - fsl,mpc8544-i2c
          - const: fsl-i2c
      - items:
          - const: fsl,mpc5200b-i2c
          - const: fsl,mpc5200-i2c
          - const: fsl-i2c

  reg:
    maxItems: 1

  interrupts:
    maxItems: 1

  fsl,preserve-clocking:
    $ref: /schemas/types.yaml#/definitions/flag
    description: |
      if defined, the clock settings from the bootloader are
      preserved (not touched)

  fsl,timeout:
    $ref: /schemas/types.yaml#/definitions/uint32
    deprecated: true
    description: |
      I2C bus timeout in microseconds

  fsl,i2c-erratum-a004447:
    $ref: /schemas/types.yaml#/definitions/flag
    description: |
      Indicates the presence of QorIQ erratum A-004447, which
      says that the standard i2c recovery scheme mechanism does
      not work and an alternate implementation is needed.

required:
  - compatible
  - reg
  - interrupts

unevaluatedProperties: false

examples:
  - |
    /* MPC5121 based board */
    i2c@1740 {
        #address-cells = <1>;
        #size-cells = <0>;
        compatible = "fsl,mpc5121-i2c", "fsl-i2c";
        reg = <0x1740 0x20>;
        interrupts = <11 0x8>;
        interrupt-parent = <&ipic>;
        clock-frequency = <100000>;
    };

  - |
    /* MPC5200B based board */
    i2c@3d00 {
        #address-cells = <1>;
        #size-cells = <0>;
        compatible = "fsl,mpc5200b-i2c", "fsl,mpc5200-i2c", "fsl-i2c";
        reg = <0x3d00 0x40>;
        interrupts = <2 15 0>;
        interrupt-parent = <&mpc5200_pic>;
        fsl,preserve-clocking;
    };

  - |
    /* MPC8544 base board */
    i2c@3100 {
        #address-cells = <1>;
        #size-cells = <0>;
        compatible = "fsl,mpc8544-i2c", "fsl-i2c";
        reg = <0x3100 0x100>;
        interrupts = <43 2>;
        interrupt-parent = <&mpic>;
        clock-frequency = <400000>;
        i2c-scl-clk-low-timeout-us = <10000>;
    };
...