xref: /openbmc/linux/Documentation/devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml (revision ee8d422c)

# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright 2019 BayLibre, SAS
%YAML 1.2
---
$id: http://devicetree.org/schemas/spi/amlogic,meson-gx-spicc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Amlogic Meson SPI Communication Controller

maintainers:
  - Neil Armstrong <neil.armstrong@linaro.org>

description: |
  The Meson SPICC is a generic SPI controller for general purpose Full-Duplex
  communications with dedicated 16 words RX/TX PIO FIFOs.

properties:
  compatible:
    enum:
      - amlogic,meson-gx-spicc # SPICC controller on Amlogic GX and compatible SoCs
      - amlogic,meson-axg-spicc # SPICC controller on Amlogic AXG and compatible SoCs
      - amlogic,meson-g12a-spicc # SPICC controller on Amlogic G12A and compatible SoCs

  interrupts:
    maxItems: 1

  reg:
    maxItems: 1

  resets:
    maxItems: 1

  clocks:
    minItems: 1
    items:
      - description: controller register bus clock
      - description: baud rate generator and delay control clock

  clock-names:
    minItems: 1
    maxItems: 2

allOf:
  - $ref: spi-controller.yaml#
  - if:
      properties:
        compatible:
          contains:
            enum:
              - amlogic,meson-g12a-spicc

    then:
      properties:
        clocks:
          minItems: 2

        clock-names:
          items:
            - const: core
            - const: pclk

    else:
      properties:
        clocks:
          maxItems: 1

        clock-names:
          items:
            - const: core

  - if:
      properties:
        compatible:
          contains:
            enum:
              - amlogic,meson-gx-spicc

    then:
      properties:
        pinctrl-0: true
        pinctrl-1: true
        pinctrl-2: true

        pinctrl-names:
          minItems: 1
          items:
            - const: default
            - const: idle-high
            - const: idle-low

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names

unevaluatedProperties: false

examples:
  - |
    spi@c1108d80 {
        compatible = "amlogic,meson-gx-spicc";
        reg = <0xc1108d80 0x80>;
        interrupts = <112>;
        clocks = <&clk81>;
        clock-names = "core";
        #address-cells = <1>;
        #size-cells = <0>;

        display@0 {
            compatible = "lg,lg4573";
            spi-max-frequency = <1000000>;
            reg = <0>;
        };
    };