1Qualcomm APR (Asynchronous Packet Router) binding
2
3This binding describes the Qualcomm APR. APR is a IPC protocol for
4communication between Application processor and QDSP. APR is mainly
5used for audio/voice services on the QDSP.
6
7- compatible:
8	Usage: required
9	Value type: <stringlist>
10	Definition: must be "qcom,apr-v<VERSION-NUMBER>", example "qcom,apr-v2"
11
12- reg
13	Usage: required
14	Value type: <u32>
15	Definition: Destination processor ID.
16	Possible values are :
17			1 - APR simulator
18			2 - PC
19			3 - MODEM
20			4 - ADSP
21			5 - APPS
22			6 - MODEM2
23			7 - APPS2
24
25= APR SERVICES
26Each subnode of the APR node represents service tied to this apr. The name
27of the nodes are not important. The properties of these nodes are defined
28by the individual bindings for the specific service
29- All APR services MUST contain the following property:
30
31- reg
32	Usage: required
33	Value type: <u32>
34	Definition: APR Service ID
35	Possible values are :
36			3 - DSP Core Service
37			4 - Audio Front End Service.
38			5 - Voice Stream Manager Service.
39			6 - Voice processing manager.
40			7 - Audio Stream Manager Service.
41			8 - Audio Device Manager Service.
42			9 - Multimode voice manager.
43			10 - Core voice stream.
44			11 - Core voice processor.
45			12 - Ultrasound stream manager.
46			13 - Listen stream manager.
47
48= EXAMPLE
49The following example represents a QDSP based sound card on a MSM8996 device
50which uses apr as communication between Apps and QDSP.
51
52	apr@4 {
53		compatible = "qcom,apr-v2";
54		reg = <APR_DOMAIN_ADSP>;
55
56		q6core@3 {
57			compatible = "qcom,q6core";
58			reg = <APR_SVC_ADSP_CORE>;
59		};
60
61		q6afe@4 {
62			compatible = "qcom,q6afe";
63			reg = <APR_SVC_AFE>;
64
65			dais {
66				#sound-dai-cells = <1>;
67				hdmi@1 {
68					reg = <1>;
69				};
70			};
71		};
72
73		q6asm@7 {
74			compatible = "qcom,q6asm";
75			reg = <APR_SVC_ASM>;
76			...
77		};
78
79		q6adm@8 {
80			compatible = "qcom,q6adm";
81			reg = <APR_SVC_ADM>;
82			...
83		};
84	};
85