1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra210-emc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: NVIDIA Tegra210 SoC External Memory Controller
8
9maintainers:
10  - Thierry Reding <thierry.reding@gmail.com>
11  - Jon Hunter <jonathanh@nvidia.com>
12
13description: |
14  The EMC interfaces with the off-chip SDRAM to service the request stream
15  sent from the memory controller.
16
17properties:
18  compatible:
19    const: nvidia,tegra210-emc
20
21  reg:
22    maxItems: 3
23
24  clocks:
25    items:
26      - description: external memory clock
27
28  clock-names:
29    items:
30      - const: emc
31
32  interrupts:
33    items:
34      - description: EMC general interrupt
35
36  memory-region:
37    $ref: /schemas/types.yaml#/definitions/phandle
38    description:
39      phandle to a reserved memory region describing the table of EMC
40      frequencies trained by the firmware
41
42  nvidia,memory-controller:
43    $ref: /schemas/types.yaml#/definitions/phandle
44    description:
45      phandle of the memory controller node
46
47required:
48  - compatible
49  - reg
50  - clocks
51  - clock-names
52  - nvidia,memory-controller
53
54additionalProperties: false
55
56examples:
57  - |
58    #include <dt-bindings/clock/tegra210-car.h>
59    #include <dt-bindings/interrupt-controller/arm-gic.h>
60
61    reserved-memory {
62        #address-cells = <1>;
63        #size-cells = <1>;
64        ranges;
65
66        emc_table: emc-table@83400000 {
67            compatible = "nvidia,tegra210-emc-table";
68            reg = <0x83400000 0x10000>;
69        };
70    };
71
72    external-memory-controller@7001b000 {
73        compatible = "nvidia,tegra210-emc";
74        reg = <0x7001b000 0x1000>,
75              <0x7001e000 0x1000>,
76              <0x7001f000 0x1000>;
77        clocks = <&tegra_car TEGRA210_CLK_EMC>;
78        clock-names = "emc";
79        interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
80        memory-region = <&emc_table>;
81        nvidia,memory-controller = <&mc>;
82    };
83