xref: /linux/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra20-mc.yaml (revision ab2900ae252b2a3dc2641bea627d1cb14a5d1bcb) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra20-mc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NVIDIA Tegra20 SoC Memory Controller
8
9maintainers:
10  - Dmitry Osipenko <digetx@gmail.com>
11  - Jon Hunter <jonathanh@nvidia.com>
12  - Thierry Reding <thierry.reding@gmail.com>
13
14description: |
15  The Tegra20 Memory Controller merges request streams from various client
16  interfaces into request stream(s) for the various memory target devices,
17  and returns response data to the various clients. The Memory Controller
18  has a configurable arbitration algorithm to allow the user to fine-tune
19  performance among the various clients.
20
21  Tegra20 Memory Controller includes the GART (Graphics Address Relocation
22  Table) which allows Memory Controller to provide a linear view of a
23  fragmented memory pages.
24
25properties:
26  compatible:
27    const: nvidia,tegra20-mc-gart
28
29  reg:
30    items:
31      - description: controller registers
32      - description: GART registers
33
34  clocks:
35    maxItems: 1
36
37  clock-names:
38    items:
39      - const: mc
40
41  interrupts:
42    maxItems: 1
43
44  "#reset-cells":
45    const: 1
46
47  "#iommu-cells":
48    const: 0
49
50  "#interconnect-cells":
51    const: 1
52
53required:
54  - compatible
55  - reg
56  - interrupts
57  - clocks
58  - clock-names
59  - "#reset-cells"
60  - "#iommu-cells"
61  - "#interconnect-cells"
62
63additionalProperties: false
64
65examples:
66  - |
67    memory-controller@7000f000 {
68        compatible = "nvidia,tegra20-mc-gart";
69        reg = <0x7000f000 0x400>, /* Controller registers */
70              <0x58000000 0x02000000>; /* GART aperture */
71        clocks = <&clock_controller 32>;
72        clock-names = "mc";
73
74        interrupts = <0 77 4>;
75
76        #iommu-cells = <0>;
77        #reset-cells = <1>;
78        #interconnect-cells = <1>;
79    };
80