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
7title: Maxim MAX8973/MAX77621 voltage regulator
8
9maintainers:
10  - Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
11
12allOf:
13  - $ref: regulator.yaml#
14
15properties:
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
92required:
93  - compatible
94  - reg
95
96unevaluatedProperties: false
97
98examples:
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/tegra-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            interrupt-parent = <&gpio>;
127            interrupts = <TEGRA_GPIO(Y, 1) IRQ_TYPE_LEVEL_LOW>;
128
129            regulator-always-on;
130            regulator-boot-on;
131            regulator-min-microvolt = <800000>;
132            regulator-max-microvolt = <1231250>;
133            regulator-name = "PPVAR_CPU";
134            regulator-ramp-delay = <12500>;
135            maxim,dvs-default-state = <1>;
136            maxim,enable-active-discharge;
137            maxim,enable-bias-control;
138            maxim,enable-etr;
139            maxim,enable-gpio = <&pmic 5 GPIO_ACTIVE_HIGH>;
140            maxim,externally-enable;
141        };
142    };
143