nvidia,tegra210-emc.yaml

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    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 
    7 title: NVIDIA Tegra210 SoC External Memory Controller
    8 
    9 maintainers:
   10   - Thierry Reding <thierry.reding@gmail.com>
   11   - Jon Hunter <jonathanh@nvidia.com>
   12 
   13 description: |
   14   The EMC interfaces with the off-chip SDRAM to service the request stream
   15   sent from the memory controller.
   16 
   17 properties:
   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     maxItems: 1
   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 
   47 required:
   48   - compatible
   49   - reg
   50   - clocks
   51   - clock-names
   52   - nvidia,memory-controller
   53 
   54 additionalProperties: false
   55 
   56 examples:
   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     };

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sys/contrib/device-tree/Bindings/memory-controllers/nvidia,tegra210-emc.yaml