Documentation/devicetree/bindings/soc/qcom/qcom,smd.yaml

   1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/soc/qcom/qcom,smd.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Qualcomm Shared Memory Driver
   8
   9 maintainers:
  10   - Andy Gross <agross@kernel.org>
  11   - Bjorn Andersson <bjorn.andersson@linaro.org>
  12   - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
  13
  14 description:
  15   The Qualcomm Shared Memory Driver is a FIFO based communication channel for
  16   sending data between the various subsystems in Qualcomm platforms.
  17
  18 properties:
  19   compatible:
  20     const: qcom,smd
  21
  22 patternProperties:
  23   "^smd-edge|rpm$":
  24     $ref: /schemas/remoteproc/qcom,smd-edge.yaml#
  25     unevaluatedProperties: false
  26     description:
  27       Each subnode of the SMD node represents a remote subsystem or a remote
  28       processor of some sort - or in SMD language an "edge". The name of the
  29       edges are not important.
  30
  31 required:
  32   - compatible
  33
  34 additionalProperties: false
  35
  36 examples:
  37   # The following example represents a smd node, with one edge representing the
  38   # "rpm" subsystem. For the "rpm" subsystem we have a device tied to the
  39   # "rpm_request" channel.
  40   - |
  41     #include <dt-bindings/interrupt-controller/arm-gic.h>
  42
  43     shared-memory {
  44         compatible = "qcom,smd";
  45
  46         rpm {
  47             interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
  48             qcom,ipc = <&apcs 8 0>;
  49             qcom,smd-edge = <15>;
  50
  51             rpm-requests {
  52                 compatible = "qcom,rpm-msm8974";
  53                 qcom,smd-channels = "rpm_requests";
  54
  55                 clock-controller {
  56                     compatible = "qcom,rpmcc-msm8974", "qcom,rpmcc";
  57                     #clock-cells = <1>;
  58                 };
  59
  60             };
  61         };
  62     };