1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/regulator/fixed-regulator.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Fixed Voltage regulators
8
9 maintainers:
10 - Liam Girdwood <lgirdwood@gmail.com>
11 - Mark Brown <broonie@kernel.org>
12
13 description:
14 Any property defined as part of the core regulator binding, defined in
15 regulator.yaml, can also be used. However a fixed voltage regulator is
16 expected to have the regulator-min-microvolt and regulator-max-microvolt
17 to be the same.
18
19 allOf:
20 - $ref: regulator.yaml#
21 - if:
22 properties:
23 compatible:
24 contains:
25 const: regulator-fixed-clock
26 then:
27 required:
28 - clocks
29 - if:
30 properties:
31 compatible:
32 contains:
33 const: regulator-fixed-domain
34 then:
35 required:
36 - power-domains
37 - required-opps
38 - not:
39 required:
40 - gpio
41 - gpios
42
43 properties:
44 $nodename:
45 anyOf:
46 - description: Preferred name is 'regulator-[0-9]v[0-9]'
47 pattern: '^regulator(-[0-9]+v[0-9]+|-[0-9a-z-]+)?$'
48 - description: Any name allowed
49 deprecated: true
50
51 compatible:
52 enum:
53 - regulator-fixed
54 - regulator-fixed-clock
55 - regulator-fixed-domain
56
57 regulator-name: true
58
59 gpio:
60 description: gpio to use for enable control
61 maxItems: 1
62
63 gpios:
64 maxItems: 1
65
66 clocks:
67 description:
68 clock to use for enable control. This binding is only available if
69 the compatible is chosen to regulator-fixed-clock. The clock binding
70 is mandatory if compatible is chosen to regulator-fixed-clock.
71 maxItems: 1
72
73 power-domains:
74 deprecated: true
75 description:
76 Power domain to use for enable control. This binding is only
77 available if the compatible is chosen to regulator-fixed-domain.
78 maxItems: 1
79
80 required-opps:
81 deprecated: true
82 description:
83 Performance state to use for enable control. This binding is only
84 available if the compatible is chosen to regulator-fixed-domain. The
85 power-domain binding is mandatory if compatible is chosen to
86 regulator-fixed-domain.
87 maxItems: 1
88
89 startup-delay-us:
90 description: startup time in microseconds
91
92 off-on-delay-us:
93 description: off delay time in microseconds
94
95 enable-active-high:
96 description:
97 Polarity of GPIO is Active high. If this property is missing,
98 the default assumed is Active low.
99 type: boolean
100
101 gpio-open-drain:
102 description:
103 GPIO is open drain type. If this property is missing then default
104 assumption is false.
105 type: boolean
106
107 vin-supply:
108 description: Input supply phandle.
109
110 interrupts:
111 maxItems: 1
112 description:
113 Interrupt signaling a critical under-voltage event.
114
115 system-critical-regulator: true
116
117 required:
118 - compatible
119 - regulator-name
120
121 unevaluatedProperties: false
122
123 examples:
124 - |
125 reg_1v8: regulator-1v8 {
126 compatible = "regulator-fixed";
127 regulator-name = "1v8";
128 regulator-min-microvolt = <1800000>;
129 regulator-max-microvolt = <1800000>;
130 gpio = <&gpio1 16 0>;
131 startup-delay-us = <70000>;
132 enable-active-high;
133 regulator-boot-on;
134 gpio-open-drain;
135 vin-supply = <&parent_reg>;
136 };
137 reg_1v8_clk: regulator-1v8-clk {
138 compatible = "regulator-fixed-clock";
139 regulator-name = "1v8";
140 regulator-min-microvolt = <1800000>;
141 regulator-max-microvolt = <1800000>;
142 clocks = <&clock1>;
143 startup-delay-us = <70000>;
144 enable-active-high;
145 regulator-boot-on;
146 vin-supply = <&parent_reg>;
147 };
148 reg_1v8_domain: regulator-1v8-domain {
149 compatible = "regulator-fixed-domain";
150 regulator-name = "1v8";
151 regulator-min-microvolt = <1800000>;
152 regulator-max-microvolt = <1800000>;
153 power-domains = <&domain1>;
154 required-opps = <&domain1_state1>;
155 startup-delay-us = <70000>;
156 enable-active-high;
157 regulator-boot-on;
158 vin-supply = <&parent_reg>;
159 };
160 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.