1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/soc/cirrus/cirrus,ep9301-syscon.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Cirrus Logic EP93xx Platforms System Controller
8
9 maintainers:
10 - Alexander Sverdlin <alexander.sverdlin@gmail.com>
11 - Nikita Shubin <nikita.shubin@maquefel.me>
12
13 description: |
14 Central resources are controlled by a set of software-locked registers,
15 which can be used to prevent accidental accesses. Syscon generates
16 the various bus and peripheral clocks and controls the system startup
17 configuration.
18
19 The System Controller (Syscon) provides:
20 - Clock control
21 - Power management
22 - System configuration management
23
24 Syscon registers are common for all EP93xx SoC's, through some actual peripheral
25 may be missing depending on actual SoC model.
26
27 properties:
28 compatible:
29 oneOf:
30 - items:
31 - enum:
32 - cirrus,ep9302-syscon
33 - cirrus,ep9307-syscon
34 - cirrus,ep9312-syscon
35 - cirrus,ep9315-syscon
36 - const: cirrus,ep9301-syscon
37 - const: syscon
38 - items:
39 - const: cirrus,ep9301-syscon
40 - const: syscon
41
42 reg:
43 maxItems: 1
44
45 "#clock-cells":
46 const: 1
47
48 clocks:
49 items:
50 - description: reference clock
51
52 patternProperties:
53 '^pins-':
54 type: object
55 description: pin node
56 $ref: /schemas/pinctrl/pinmux-node.yaml
57
58 properties:
59 function:
60 enum: [ spi, ac97, i2s, pwm, keypad, pata, lcd, gpio ]
61
62 groups:
63 enum: [ ssp, ac97, i2s_on_ssp, i2s_on_ac97, pwm1, gpio1agrp,
64 gpio2agrp, gpio3agrp, gpio4agrp, gpio6agrp, gpio7agrp,
65 rasteronsdram0grp, rasteronsdram3grp, keypadgrp, idegrp ]
66
67 required:
68 - function
69 - groups
70
71 unevaluatedProperties: false
72
73 required:
74 - compatible
75 - reg
76 - "#clock-cells"
77 - clocks
78
79 additionalProperties: false
80
81 examples:
82 - |
83 syscon@80930000 {
84 compatible = "cirrus,ep9301-syscon", "syscon";
85 reg = <0x80930000 0x1000>;
86
87 #clock-cells = <1>;
88 clocks = <&xtali>;
89
90 spi_default_pins: pins-spi {
91 function = "spi";
92 groups = "ssp";
93 };
94 };
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