tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/mfd/syscon.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: System Controller Registers R/W Device Tree Bindings
8
9description: |
10 System controller node represents a register region containing a set
11 of miscellaneous registers. The registers are not cohesive enough to
12 represent as any specific type of device. The typical use-case is
13 for some other node's driver, or platform-specific code, to acquire
14 a reference to the syscon node (e.g. by phandle, node path, or
15 search using a specific compatible value), interrogate the node (or
16 associated OS driver) to determine the location of the registers,
17 and access the registers directly.
18
19maintainers:
20 - Lee Jones <lee.jones@linaro.org>
21
22select:
23 properties:
24 compatible:
25 contains:
26 enum:
27 - syscon
28
29 required:
30 - compatible
31
32properties:
33 compatible:
34 anyOf:
35 - items:
36 - enum:
37 - allwinner,sun8i-a83t-system-controller
38 - allwinner,sun8i-h3-system-controller
39 - allwinner,sun8i-v3s-system-controller
40 - allwinner,sun50i-a64-system-controller
41
42 - const: syscon
43
44 - contains:
45 const: syscon
46 additionalItems: true
47
48 reg:
49 maxItems: 1
50
51 reg-io-width:
52 description: |
53 The size (in bytes) of the IO accesses that should be performed
54 on the device.
55 allOf:
56 - $ref: /schemas/types.yaml#/definitions/uint32
57 - enum: [ 1, 2, 4, 8 ]
58
59 hwlocks:
60 maxItems: 1
61 description:
62 Reference to a phandle of a hardware spinlock provider node.
63
64required:
65 - compatible
66 - reg
67
68unevaluatedProperties: false
69
70examples:
71 - |
72 syscon: syscon@1c00000 {
73 compatible = "allwinner,sun8i-h3-system-controller", "syscon";
74 reg = <0x01c00000 0x1000>;
75 };
76
77 - |
78 gpr: iomuxc-gpr@20e0000 {
79 compatible = "fsl,imx6q-iomuxc-gpr", "syscon";
80 reg = <0x020e0000 0x38>;
81 hwlocks = <&hwlock1 1>;
82 };
83
84...