1 # SPDX-License-Identifier: GPL-2.0-only
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/regulator/maxim,max8973.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Maxim MAX8973/MAX77621 voltage regulator
8
9 maintainers:
10 - Krzysztof Kozlowski <krzk@kernel.org>
11
12 allOf:
13 - $ref: regulator.yaml#
14
15 properties:
16 compatible:
17 enum:
18 - maxim,max8973
19 - maxim,max77621
20
21 junction-warn-millicelsius:
22 description: |
23 Junction warning temperature threshold in millicelsius. If die
24 temperature crosses this level then device generates the warning
25 interrupts.
26 Please note that thermal functionality is only supported on MAX77621. The
27 supported threshold warning temperature for MAX77621 are 120 degC and 140
28 degC.
29
30 maxim,dvs-gpio:
31 maxItems: 1
32 description: |
33 GPIO which is connected to DVS pin of device.
34
35 maxim,dvs-default-state:
36 $ref: /schemas/types.yaml#/definitions/uint32
37 enum: [0, 1]
38 description: |
39 Default state of GPIO during initialisation.
40 1 for HIGH and 0 for LOW.
41
42 maxim,externally-enable:
43 type: boolean
44 description: |
45 Externally control the regulator output enable/disable.
46
47 maxim,enable-gpio:
48 maxItems: 1
49 description: |
50 GPIO for enable control. If the valid GPIO is provided then externally
51 enable control will be considered.
52
53 maxim,enable-remote-sense:
54 type: boolean
55 description: Enable remote sense.
56
57 maxim,enable-falling-slew-rate:
58 type: boolean
59 description: Enable falling slew rate.
60
61 maxim,enable-active-discharge:
62 type: boolean
63 description: Eable active discharge.
64
65 maxim,enable-frequency-shift:
66 type: boolean
67 description: Enable 9% frequency shift.
68
69 maxim,enable-bias-control:
70 type: boolean
71 description: |
72 Enable bias control which can reduce the startup delay to 20us from 220us.
73
74 maxim,enable-etr:
75 type: boolean
76 description: Enable Enhanced Transient Response.
77
78 maxim,enable-high-etr-sensitivity:
79 type: boolean
80 description: |
81 Enhanced transient response circuit is enabled and set for high
82 sensitivity. If this property is available then etr will be enable
83 default.
84 Enhanced transient response (ETR) will affect the configuration of CKADV.
85
86 reg:
87 maxItems: 1
88
89 interrupts:
90 maxItems: 1
91
92 required:
93 - compatible
94 - reg
95
96 unevaluatedProperties: false
97
98 examples:
99 - |
100 i2c {
101 #address-cells = <1>;
102 #size-cells = <0>;
103
104 regulator@1b {
105 compatible = "maxim,max8973";
106 reg = <0x1b>;
107
108 regulator-min-microvolt = <935000>;
109 regulator-max-microvolt = <1200000>;
110 regulator-boot-on;
111 regulator-always-on;
112 };
113 };
114
115 - |
116 #include <dt-bindings/gpio/gpio.h>
117 #include <dt-bindings/interrupt-controller/irq.h>
118
119 i2c {
120 #address-cells = <1>;
121 #size-cells = <0>;
122
123 regulator@1b {
124 compatible = "maxim,max77621";
125 reg = <0x1b>;
126 interrupts = <1 IRQ_TYPE_LEVEL_LOW>;
127
128 regulator-always-on;
129 regulator-boot-on;
130 regulator-min-microvolt = <800000>;
131 regulator-max-microvolt = <1231250>;
132 regulator-name = "PPVAR_CPU";
133 regulator-ramp-delay = <12500>;
134 maxim,dvs-default-state = <1>;
135 maxim,enable-active-discharge;
136 maxim,enable-bias-control;
137 maxim,enable-etr;
138 maxim,enable-gpio = <&pmic 5 GPIO_ACTIVE_HIGH>;
139 maxim,externally-enable;
140 };
141 };
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