xref: /linux/Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml (revision 011f129fee4bd064a3db30ca1a0139548a619482) 
1# SPDX-License-Identifier: GPL-2.0 OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mailbox/qcom-ipcc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Qualcomm Technologies, Inc. Inter-Processor Communication Controller
8
9maintainers:
10  - Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
11
12description:
13  The Inter-Processor Communication Controller (IPCC) is a centralized hardware
14  to route interrupts across various subsystems. It involves a three-level
15  addressing scheme called protocol, client and signal. For example, consider an
16  entity on the Application Processor Subsystem (APSS) that wants to listen to
17  Modem's interrupts via Shared Memory Point to Point (SMP2P) interface. In such
18  a case, the client would be Modem (client-id is 2) and the signal would be
19  SMP2P (signal-id is 2). The SMP2P itself falls under the Multiprocessor (MPROC)
20  protocol (protocol-id is 0). Refer include/dt-bindings/mailbox/qcom-ipcc.h
21  for the list of such IDs.
22
23properties:
24  compatible:
25    items:
26      - enum:
27          - qcom,qdu1000-ipcc
28          - qcom,sa8775p-ipcc
29          - qcom,sc7280-ipcc
30          - qcom,sc8280xp-ipcc
31          - qcom,sm6350-ipcc
32          - qcom,sm6375-ipcc
33          - qcom,sm8250-ipcc
34          - qcom,sm8350-ipcc
35          - qcom,sm8450-ipcc
36          - qcom,sm8550-ipcc
37          - qcom,sm8650-ipcc
38      - const: qcom,ipcc
39
40  reg:
41    maxItems: 1
42
43  interrupts:
44    maxItems: 1
45
46  interrupt-controller: true
47
48  "#interrupt-cells":
49    const: 3
50    description:
51      The first cell is the client-id, the second cell is the signal-id and the
52      third cell is the interrupt type.
53
54  "#mbox-cells":
55    const: 2
56    description:
57      The first cell is the client-id, and the second cell is the signal-id.
58
59required:
60  - compatible
61  - reg
62  - interrupts
63  - interrupt-controller
64  - "#interrupt-cells"
65  - "#mbox-cells"
66
67additionalProperties: false
68
69examples:
70  - |
71    #include <dt-bindings/interrupt-controller/arm-gic.h>
72    #include <dt-bindings/mailbox/qcom-ipcc.h>
73
74    mailbox@408000 {
75        compatible = "qcom,sm8250-ipcc", "qcom,ipcc";
76        reg = <0x408000 0x1000>;
77        interrupts = <GIC_SPI 229 IRQ_TYPE_LEVEL_HIGH>;
78        interrupt-controller;
79        #interrupt-cells = <3>;
80        #mbox-cells = <2>;
81    };
82