Documentation/devicetree/bindings/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/reserved-memory/nvidia,tegra264-bpmp-shmem.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Tegra CPU-NS - BPMP IPC reserved memory
   8
   9 maintainers:
  10   - Peter De Schrijver <pdeschrijver@nvidia.com>
  11
  12 description: |
  13   Define a memory region used for communication between CPU-NS and BPMP.
  14   Typically this node is created by the bootloader as the physical address
  15   has to be known to both CPU-NS and BPMP for correct IPC operation.
  16   The memory region is defined using a child node under /reserved-memory.
  17   The sub-node is named shmem@<address>.
  18
  19 allOf:
  20   - $ref: reserved-memory.yaml
  21
  22 properties:
  23   compatible:
  24     const: nvidia,tegra264-bpmp-shmem
  25
  26   reg:
  27     description: The physical address and size of the shared SDRAM region
  28
  29 unevaluatedProperties: false
  30
  31 required:
  32   - compatible
  33   - reg
  34   - no-map
  35
  36 examples:
  37   - |
  38     reserved-memory {
  39        #address-cells = <2>;
  40        #size-cells = <2>;
  41        dram_cpu_bpmp_mail: shmem@f1be0000 {
  42            compatible = "nvidia,tegra264-bpmp-shmem";
  43            reg = <0x0 0xf1be0000 0x0 0x2000>;
  44            no-map;
  45        };
  46     };
  47 ...