1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-C 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/remoteproc/ 4 $id: http://devicetree.org/schemas/remoteproc/qcom,rpm-proc.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: Qualcomm Resource Power Manager (RPM) P 7 title: Qualcomm Resource Power Manager (RPM) Processor/Subsystem
8 8
9 maintainers: 9 maintainers:
10 - Bjorn Andersson <andersson@kernel.org> 10 - Bjorn Andersson <andersson@kernel.org>
11 - Konrad Dybcio <konradybcio@kernel.org> 11 - Konrad Dybcio <konradybcio@kernel.org>
12 - Stephan Gerhold <stephan@gerhold.net> 12 - Stephan Gerhold <stephan@gerhold.net>
13 13
14 description: | 14 description: |
15 Resource Power Manager (RPM) subsystem found 15 Resource Power Manager (RPM) subsystem found in various Qualcomm platforms:
16 16
17 +--------------------------- 17 +--------------------------------------------+
18 | RPM subsystem (qcom, 18 | RPM subsystem (qcom,rpm-proc) |
19 | 19 | |
20 reset | +---------------+ +--- 20 reset | +---------------+ +-----+ +-----+ |
21 --------->| | | MP 21 --------->| | | MPM | | CPR | ... |
22 IPC interrupts | | ARM Cortex-M3 |--- +--- 22 IPC interrupts | | ARM Cortex-M3 |--- +-----+ +-----+ |
23 ----------------->| | | | 23 ----------------->| | | | | |
24 | +---------------+ |------ 24 | +---------------+ |---------------------- |
25 | +---------------+ | 25 | +---------------+ | |
26 | | Code RAM |--| +--- 26 | | Code RAM |--| +------------------+ |
27 | +---------------+ | | 27 | +---------------+ | | | |
28 | +---------------+ |--| 28 | +---------------+ |--| Message RAM | |
29 | | Data RAM |--| | 29 | | Data RAM |--| | | |
30 | +---------------+ | +--- 30 | +---------------+ | +------------------+ |
31 +--------------------|------ 31 +--------------------|-----------------------+
32 v 32 v
33 NoC 33 NoC
34 34
35 The firmware running on the processor inside 35 The firmware running on the processor inside the RPM subsystem allows each
36 component in the system to vote for state of 36 component in the system to vote for state of the system resources, such as
37 clocks, regulators and bus frequencies. It i 37 clocks, regulators and bus frequencies. It implements multiple separate
38 communication interfaces that are described 38 communication interfaces that are described in subnodes, e.g. SMD and MPM:
39 39
40 +------------------------------+ 40 +------------------------------+
41 | ARM Cortex-M3 | 41 | ARM Cortex-M3 |
42 | | 42 | | +------------------------------+
43 | +--------------------------+ | 43 | +--------------------------+ | | Message RAM |
44 | | RPM firmware | | 44 | | RPM firmware | | | |
45 IPC IRQ 0 | | +----------------------+ | | 45 IPC IRQ 0 | | +----------------------+ | | | +--------------------------+ |
46 -------------->| SMD server |<---- 46 -------------->| SMD server |<------->| SMD data structures | |
47 | | | +--------------+ | | | 47 | | | +--------------+ | | | | | +--------------+ | |
48 | | | | rpm_requests | ... | | | 48 | | | | rpm_requests | ... | | | | | | rpm_requests | ... | |
49 | | | +--------------+ | | | 49 | | | +--------------+ | | | | | +--------------+ | |
50 IPC IRQ 1 | | +----------------------+ | | 50 IPC IRQ 1 | | +----------------------+ | | | +--------------------------+ |
51 -------------->| MPM virtualization |<---- 51 -------------->| MPM virtualization |<--------| MPM register copy (vMPM) | |
52 | | +----------------------+ | | 52 | | +----------------------+ | | | +--------------------------+ |
53 | | ... | | | 53 | | ... | | | | ... |
54 | +--------------------|-----+ | 54 | +--------------------|-----+ | +------------------------------+
55 +----------------------|-------+ 55 +----------------------|-------+
56 v 56 v
57 +--------------+ 57 +--------------+
58 | MPM Hardware | 58 | MPM Hardware |
59 +--------------+ 59 +--------------+
60 60
61 The services provided by the firmware are on 61 The services provided by the firmware are only available after the firmware
62 has been loaded and the processor has been r 62 has been loaded and the processor has been released from reset. Usually this
63 happens early in the boot process before the 63 happens early in the boot process before the operating system is started.
64 64
65 properties: 65 properties:
66 compatible: 66 compatible:
67 items: 67 items:
68 - enum: 68 - enum:
69 - qcom,apq8084-rpm-proc 69 - qcom,apq8084-rpm-proc
70 - qcom,ipq6018-rpm-proc 70 - qcom,ipq6018-rpm-proc
71 - qcom,ipq9574-rpm-proc 71 - qcom,ipq9574-rpm-proc
72 - qcom,mdm9607-rpm-proc 72 - qcom,mdm9607-rpm-proc
73 - qcom,msm8226-rpm-proc 73 - qcom,msm8226-rpm-proc
74 - qcom,msm8610-rpm-proc 74 - qcom,msm8610-rpm-proc
75 - qcom,msm8909-rpm-proc 75 - qcom,msm8909-rpm-proc
76 - qcom,msm8916-rpm-proc 76 - qcom,msm8916-rpm-proc
77 - qcom,msm8917-rpm-proc 77 - qcom,msm8917-rpm-proc
78 - qcom,msm8936-rpm-proc 78 - qcom,msm8936-rpm-proc
79 - qcom,msm8937-rpm-proc 79 - qcom,msm8937-rpm-proc
80 - qcom,msm8952-rpm-proc 80 - qcom,msm8952-rpm-proc
81 - qcom,msm8953-rpm-proc 81 - qcom,msm8953-rpm-proc
82 - qcom,msm8974-rpm-proc 82 - qcom,msm8974-rpm-proc
83 - qcom,msm8976-rpm-proc 83 - qcom,msm8976-rpm-proc
84 - qcom,msm8994-rpm-proc 84 - qcom,msm8994-rpm-proc
85 - qcom,msm8996-rpm-proc 85 - qcom,msm8996-rpm-proc
86 - qcom,msm8998-rpm-proc 86 - qcom,msm8998-rpm-proc
87 - qcom,qcm2290-rpm-proc 87 - qcom,qcm2290-rpm-proc
88 - qcom,qcs404-rpm-proc 88 - qcom,qcs404-rpm-proc
89 - qcom,sdm660-rpm-proc 89 - qcom,sdm660-rpm-proc
90 - qcom,sm6115-rpm-proc 90 - qcom,sm6115-rpm-proc
91 - qcom,sm6125-rpm-proc 91 - qcom,sm6125-rpm-proc
92 - qcom,sm6375-rpm-proc 92 - qcom,sm6375-rpm-proc
93 - const: qcom,rpm-proc 93 - const: qcom,rpm-proc
94 94
95 smd-edge: 95 smd-edge:
96 $ref: /schemas/remoteproc/qcom,smd-edge.ya 96 $ref: /schemas/remoteproc/qcom,smd-edge.yaml#
97 description: 97 description:
98 Qualcomm Shared Memory subnode which rep 98 Qualcomm Shared Memory subnode which represents communication edge,
99 channels and devices related to the RPM 99 channels and devices related to the RPM subsystem.
100 100
101 glink-edge: 101 glink-edge:
102 $ref: /schemas/remoteproc/qcom,glink-rpm-e 102 $ref: /schemas/remoteproc/qcom,glink-rpm-edge.yaml#
103 description: 103 description:
104 Qualcomm G-Link subnode which represents 104 Qualcomm G-Link subnode which represents communication edge,
105 channels and devices related to the RPM 105 channels and devices related to the RPM subsystem.
106 106
107 interrupt-controller: 107 interrupt-controller:
108 type: object 108 type: object
109 $ref: /schemas/interrupt-controller/qcom,m 109 $ref: /schemas/interrupt-controller/qcom,mpm.yaml#
110 description: 110 description:
111 MSM Power Manager (MPM) interrupt contro 111 MSM Power Manager (MPM) interrupt controller that monitors interrupts
112 when the system is asleep. 112 when the system is asleep.
113 113
114 master-stats: 114 master-stats:
115 $ref: /schemas/soc/qcom/qcom,rpm-master-st 115 $ref: /schemas/soc/qcom/qcom,rpm-master-stats.yaml#
116 description: 116 description:
117 Subsystem-level low-power mode statistic 117 Subsystem-level low-power mode statistics provided by RPM.
118 118
119 required: 119 required:
120 - compatible 120 - compatible
121 121
122 oneOf: 122 oneOf:
123 - required: 123 - required:
124 - smd-edge 124 - smd-edge
125 - required: 125 - required:
126 - glink-edge 126 - glink-edge
127 127
128 additionalProperties: false 128 additionalProperties: false
129 129
130 examples: 130 examples:
131 # SMD 131 # SMD
132 - | 132 - |
133 #include <dt-bindings/interrupt-controller 133 #include <dt-bindings/interrupt-controller/arm-gic.h>
134 #include <dt-bindings/interrupt-controller 134 #include <dt-bindings/interrupt-controller/irq.h>
135 135
136 remoteproc { 136 remoteproc {
137 compatible = "qcom,msm8916-rpm-proc", "q 137 compatible = "qcom,msm8916-rpm-proc", "qcom,rpm-proc";
138 138
139 smd-edge { 139 smd-edge {
140 interrupts = <GIC_SPI 168 IRQ_TYPE_EDG 140 interrupts = <GIC_SPI 168 IRQ_TYPE_EDGE_RISING>;
141 qcom,ipc = <&apcs 8 0>; 141 qcom,ipc = <&apcs 8 0>;
142 qcom,smd-edge = <15>; 142 qcom,smd-edge = <15>;
143 143
144 rpm-requests { 144 rpm-requests {
145 compatible = "qcom,rpm-msm8916", "qc 145 compatible = "qcom,rpm-msm8916", "qcom,smd-rpm";
146 qcom,smd-channels = "rpm_requests"; 146 qcom,smd-channels = "rpm_requests";
147 /* ... */ 147 /* ... */
148 }; 148 };
149 }; 149 };
150 }; 150 };
151 # GLINK 151 # GLINK
152 - | 152 - |
153 #include <dt-bindings/interrupt-controller 153 #include <dt-bindings/interrupt-controller/arm-gic.h>
154 #include <dt-bindings/interrupt-controller 154 #include <dt-bindings/interrupt-controller/irq.h>
155 155
156 remoteproc { 156 remoteproc {
157 compatible = "qcom,qcm2290-rpm-proc", "q 157 compatible = "qcom,qcm2290-rpm-proc", "qcom,rpm-proc";
158 158
159 glink-edge { 159 glink-edge {
160 compatible = "qcom,glink-rpm"; 160 compatible = "qcom,glink-rpm";
161 interrupts = <GIC_SPI 194 IRQ_TYPE_EDG 161 interrupts = <GIC_SPI 194 IRQ_TYPE_EDGE_RISING>;
162 qcom,rpm-msg-ram = <&rpm_msg_ram>; 162 qcom,rpm-msg-ram = <&rpm_msg_ram>;
163 mboxes = <&apcs_glb 0>; 163 mboxes = <&apcs_glb 0>;
164 164
165 rpm-requests { 165 rpm-requests {
166 compatible = "qcom,rpm-qcm2290", "qc 166 compatible = "qcom,rpm-qcm2290", "qcom,glink-smd-rpm";
167 qcom,glink-channels = "rpm_requests" 167 qcom,glink-channels = "rpm_requests";
168 /* ... */ 168 /* ... */
169 }; 169 };
170 }; 170 };
171 }; 171 };
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