1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/arm/keystone/ti,sci.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: TI-SCI controller
8
9 maintainers:
10 - Nishanth Menon <nm@ti.com>
11
12 description: |
13 Texas Instrument's processors including those belonging to Keystone generation
14 of processors have separate hardware entity which is now responsible for the
15 management of the System on Chip (SoC) system. These include various system
16 level functions as well.
17
18 An example of such an SoC is K2G, which contains the system control hardware
19 block called Power Management Micro Controller (PMMC). This hardware block is
20 initialized early into boot process and provides services to Operating Systems
21 on multiple processors including ones running Linux.
22
23 See https://software-dl.ti.com/tisci/esd/latest/index.html for protocol definition.
24
25 The TI-SCI node describes the Texas Instrument's System Controller entity node.
26 This parent node may optionally have additional children nodes which describe
27 specific functionality such as clocks, power domain, reset or additional
28 functionality as may be required for the SoC. This hierarchy also describes the
29 relationship between the TI-SCI parent node to the child node.
30
31 properties:
32 $nodename:
33 pattern: "^system-controller@[0-9a-f]+$"
34
35 compatible:
36 oneOf:
37 - description: System controller on TI 66AK2G SoC and other K3 SoCs
38 items:
39 - const: ti,k2g-sci
40 - description: System controller on TI AM654 SoC
41 items:
42 - const: ti,am654-sci
43
44 reg-names:
45 description: |
46 Specifies the debug messages memory mapped region that is optionally
47 made available from TI-SCI controller.
48 const: debug_messages
49
50 reg:
51 minItems: 1
52
53 mbox-names:
54 description: |
55 Specifies the mailboxes used to communicate with TI-SCI Controller
56 made available from TI-SCI controller.
57 items:
58 - const: rx
59 - const: tx
60
61 mboxes:
62 minItems: 2
63
64 ti,host-id:
65 $ref: /schemas/types.yaml#/definitions/uint32
66 description: |
67 Value corresponding to the host ID assigned by Firmware
68 for identification of host processing entities such as virtual machines.
69
70 power-controller:
71 type: object
72 $ref: /schemas/soc/ti/sci-pm-domain.yaml#
73
74 clock-controller:
75 type: object
76 $ref: /schemas/clock/ti,sci-clk.yaml#
77
78 reset-controller:
79 type: object
80 $ref: /schemas/reset/ti,sci-reset.yaml#
81
82 required:
83 - compatible
84 - mbox-names
85 - mboxes
86
87 additionalProperties: false
88
89 examples:
90 - |
91 pmmc: system-controller@2921800 {
92 compatible = "ti,k2g-sci";
93 mbox-names = "rx", "tx";
94 mboxes = <&msgmgr 5 2>,
95 <&msgmgr 0 0>;
96 reg-names = "debug_messages";
97 reg = <0x02921800 0x800>;
98 };
99
100 - |
101 dmsc: system-controller@44083000 {
102 compatible = "ti,k2g-sci";
103 ti,host-id = <12>;
104 mbox-names = "rx", "tx";
105 mboxes = <&secure_proxy_main 11>,
106 <&secure_proxy_main 13>;
107 reg-names = "debug_messages";
108 reg = <0x44083000 0x1000>;
109
110 k3_pds: power-controller {
111 compatible = "ti,sci-pm-domain";
112 #power-domain-cells = <2>;
113 };
114
115 k3_clks: clock-controller {
116 compatible = "ti,k2g-sci-clk";
117 #clock-cells = <2>;
118 };
119
120 k3_reset: reset-controller {
121 compatible = "ti,sci-reset";
122 #reset-cells = <2>;
123 };
124 };
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