xref: /freebsd/sys/contrib/device-tree/Bindings/mfd/ti,j721e-system-controller.yaml (revision 3a3af6b2a160bea72509a9d5ef84e25906b0478a) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2# Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/mfd/ti,j721e-system-controller.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: TI J721e System Controller Registers R/W Device Tree Bindings
9
10description: |
11  This represents the Control Module registers (CTRL_MMR0) on the SoC.
12  System controller node represents a register region containing a set
13  of miscellaneous registers. The registers are not cohesive enough to
14  represent as any specific type of device. The typical use-case is
15  for some other node's driver, or platform-specific code, to acquire
16  a reference to the syscon node (e.g. by phandle, node path, or
17  search using a specific compatible value), interrogate the node (or
18  associated OS driver) to determine the location of the registers,
19  and access the registers directly.
20
21maintainers:
22  - Kishon Vijay Abraham I <kishon@ti.com>
23  - Roger Quadros <rogerq@kernel.org>
24
25properties:
26  compatible:
27    items:
28      - enum:
29          - ti,j721e-system-controller
30      - const: syscon
31      - const: simple-mfd
32
33  reg:
34    maxItems: 1
35
36  "#address-cells":
37    const: 1
38
39  "#size-cells":
40    const: 1
41
42  ranges: true
43
44patternProperties:
45  # Optional children
46  "^mux-controller@[0-9a-f]+$":
47    type: object
48    description:
49      This is the SERDES lane control mux.
50
51required:
52  - compatible
53  - reg
54  - "#address-cells"
55  - "#size-cells"
56  - ranges
57
58additionalProperties: false
59
60examples:
61  - |
62    scm_conf: scm-conf@100000 {
63        compatible = "ti,j721e-system-controller", "syscon", "simple-mfd";
64        reg = <0x00100000 0x1c000>;
65        #address-cells = <1>;
66        #size-cells = <1>;
67        ranges;
68
69        serdes_ln_ctrl: mux-controller@4080 {
70            compatible = "mmio-mux";
71            reg = <0x00004080 0x50>;
72
73            #mux-control-cells = <1>;
74            mux-reg-masks =
75                <0x4080 0x3>, <0x4084 0x3>, /* SERDES0 lane0/1 select */
76                <0x4090 0x3>, <0x4094 0x3>, /* SERDES1 lane0/1 select */
77                <0x40a0 0x3>, <0x40a4 0x3>, /* SERDES2 lane0/1 select */
78                <0x40b0 0x3>, <0x40b4 0x3>, /* SERDES3 lane0/1 select */
79                <0x40c0 0x3>, <0x40c4 0x3>, <0x40c8 0x3>, <0x40cc 0x3>;
80                /* SERDES4 lane0/1/2/3 select */
81        };
82    };
83...
84