xref: /freebsd/sys/contrib/device-tree/Bindings/memory-controllers/nvidia,tegra20-mc.yaml (revision 2eb4d8dc)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra20-mc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: NVIDIA Tegra20 SoC Memory Controller

maintainers:
  - Dmitry Osipenko <digetx@gmail.com>
  - Jon Hunter <jonathanh@nvidia.com>
  - Thierry Reding <thierry.reding@gmail.com>

description: |
  The Tegra20 Memory Controller merges request streams from various client
  interfaces into request stream(s) for the various memory target devices,
  and returns response data to the various clients. The Memory Controller
  has a configurable arbitration algorithm to allow the user to fine-tune
  performance among the various clients.

  Tegra20 Memory Controller includes the GART (Graphics Address Relocation
  Table) which allows Memory Controller to provide a linear view of a
  fragmented memory pages.

properties:
  compatible:
    const: nvidia,tegra20-mc-gart

  reg:
    items:
      - description: controller registers
      - description: GART registers

  clocks:
    maxItems: 1

  clock-names:
    items:
      - const: mc

  interrupts:
    maxItems: 1

  "#reset-cells":
    const: 1

  "#iommu-cells":
    const: 0

  "#interconnect-cells":
    const: 1

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - clock-names
  - "#reset-cells"
  - "#iommu-cells"
  - "#interconnect-cells"

additionalProperties: false

examples:
  - |
    memory-controller@7000f000 {
        compatible = "nvidia,tegra20-mc-gart";
        reg = <0x7000f000 0x400>,	/* Controller registers */
              <0x58000000 0x02000000>;	/* GART aperture */
        clocks = <&clock_controller 32>;
        clock-names = "mc";

        interrupts = <0 77 4>;

        #iommu-cells = <0>;
        #reset-cells = <1>;
        #interconnect-cells = <1>;
    };