Documentation/devicetree/bindings/arm/socionext/socionext,uniphier-system-cache.yaml

# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/arm/socionext/socionext,uniphier-system-cache.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: UniPhier outer cache controller

description: |
  UniPhier ARM 32-bit SoCs are integrated with a full-custom outer cache
  controller system. All of them have a level 2 cache controller, and some
  have a level 3 cache controller as well.

maintainers:
  - Masahiro Yamada <yamada.masahiro@socionext.com>

properties:
  compatible:
    const: socionext,uniphier-system-cache

  reg:
    description: |
      should contain 3 regions: control register, revision register,
      operation register, in this order.
    minItems: 3
    maxItems: 3

  interrupts:
    description: |
      Interrupts can be used to notify the completion of cache operations.
      The number of interrupts should match to the number of CPU cores.
      The specified interrupts correspond to CPU0, CPU1, ... in this order.
    minItems: 1
    maxItems: 4

  cache-unified: true

  cache-size: true

  cache-sets: true

  cache-line-size: true

  cache-level:
    minimum: 2
    maximum: 3

  next-level-cache: true

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

additionalProperties: false

required:
  - compatible
  - reg
  - interrupts
  - cache-unified
  - cache-size
  - cache-sets
  - cache-line-size
  - cache-level

examples:
  - |
    // System with L2.
    cache-controller@500c0000 {
        compatible = "socionext,uniphier-system-cache";
        reg = <0x500c0000 0x2000>, <0x503c0100 0x4>, <0x506c0000 0x400>;
        interrupts = <0 174 4>, <0 175 4>, <0 190 4>, <0 191 4>;
        cache-unified;
        cache-size = <0x140000>;
        cache-sets = <512>;
        cache-line-size = <128>;
        cache-level = <2>;
    };
  - |
    // System with L2 and L3.
    //   L2 should specify the next level cache by 'next-level-cache'.
    l2: cache-controller@500c0000 {
        compatible = "socionext,uniphier-system-cache";
        reg = <0x500c0000 0x2000>, <0x503c0100 0x8>, <0x506c0000 0x400>;
        interrupts = <0 190 4>, <0 191 4>;
        cache-unified;
        cache-size = <0x200000>;
        cache-sets = <512>;
        cache-line-size = <128>;
        cache-level = <2>;
        next-level-cache = <&l3>;
    };

    l3: cache-controller@500c8000 {
        compatible = "socionext,uniphier-system-cache";
        reg = <0x500c8000 0x2000>, <0x503c8100 0x8>, <0x506c8000 0x400>;
        interrupts = <0 174 4>, <0 175 4>;
        cache-unified;
        cache-size = <0x200000>;
        cache-sets = <512>;
        cache-line-size = <256>;
        cache-level = <3>;
    };