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
7title: Qualcomm Shared Memory Driver
8
9maintainers:
10  - Andy Gross <agross@kernel.org>
11  - Bjorn Andersson <bjorn.andersson@linaro.org>
12  - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
13
14description:
15  The Qualcomm Shared Memory Driver is a FIFO based communication channel for
16  sending data between the various subsystems in Qualcomm platforms.
17
18properties:
19  compatible:
20    const: qcom,smd
21
22patternProperties:
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
31required:
32  - compatible
33
34additionalProperties: false
35
36examples:
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    };
63