0001 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra210-emc.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: NVIDIA Tegra210 SoC External Memory Controller
0008
0009 maintainers:
0010 - Thierry Reding <thierry.reding@gmail.com>
0011 - Jon Hunter <jonathanh@nvidia.com>
0012
0013 description: |
0014 The EMC interfaces with the off-chip SDRAM to service the request stream
0015 sent from the memory controller.
0016
0017 properties:
0018 compatible:
0019 const: nvidia,tegra210-emc
0020
0021 reg:
0022 maxItems: 3
0023
0024 clocks:
0025 items:
0026 - description: external memory clock
0027
0028 clock-names:
0029 items:
0030 - const: emc
0031
0032 interrupts:
0033 items:
0034 - description: EMC general interrupt
0035
0036 memory-region:
0037 maxItems: 1
0038 description:
0039 phandle to a reserved memory region describing the table of EMC
0040 frequencies trained by the firmware
0041
0042 nvidia,memory-controller:
0043 $ref: /schemas/types.yaml#/definitions/phandle
0044 description:
0045 phandle of the memory controller node
0046
0047 required:
0048 - compatible
0049 - reg
0050 - clocks
0051 - clock-names
0052 - nvidia,memory-controller
0053
0054 additionalProperties: false
0055
0056 examples:
0057 - |
0058 #include <dt-bindings/clock/tegra210-car.h>
0059 #include <dt-bindings/interrupt-controller/arm-gic.h>
0060
0061 reserved-memory {
0062 #address-cells = <1>;
0063 #size-cells = <1>;
0064 ranges;
0065
0066 emc_table: emc-table@83400000 {
0067 compatible = "nvidia,tegra210-emc-table";
0068 reg = <0x83400000 0x10000>;
0069 };
0070 };
0071
0072 external-memory-controller@7001b000 {
0073 compatible = "nvidia,tegra210-emc";
0074 reg = <0x7001b000 0x1000>,
0075 <0x7001e000 0x1000>,
0076 <0x7001f000 0x1000>;
0077 clocks = <&tegra_car TEGRA210_CLK_EMC>;
0078 clock-names = "emc";
0079 interrupts = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;
0080 memory-region = <&emc_table>;
0081 nvidia,memory-controller = <&mc>;
0082 };
