1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/rohm,bd96801-pmic.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ROHM BD96801 Scalable Power Management Integrated Circuit
maintainers:
- Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
description:
BD96801 is an automotive grade single-chip power management IC.
It integrates 4 buck converters and 3 LDOs with safety features like
over-/under voltage and over current detection and a watchdog.
properties:
compatible:
const: rohm,bd96801
reg:
maxItems: 1
interrupts:
description:
The PMIC provides intb and errb IRQ lines. The errb IRQ line is used
for fatal IRQs which will cause the PMIC to shut down power outputs.
In many systems this will shut down the SoC contolling the PMIC and
connecting/handling the errb can be omitted. However, there are cases
where the SoC is not powered by the PMIC or has a short time backup
energy to handle shutdown of critical hardware. In that case it may be
useful to connect the errb and handle errb events.
minItems: 1
maxItems: 2
interrupt-names:
minItems: 1
items:
- enum: [intb, errb]
- const: errb
rohm,hw-timeout-ms:
description:
Watchdog timeout value(s). First walue is timeout limit. Second value is
optional value for 'too early' watchdog ping if window timeout mode is
to be used.
minItems: 1
maxItems: 2
rohm,wdg-action:
description:
Whether the watchdog failure must turn off the regulator power outputs or
just toggle the INTB line.
enum:
- prstb
- intb-only
timeout-sec:
maxItems: 2
regulators:
$ref: /schemas/regulator/rohm,bd96801-regulator.yaml
description:
List of child nodes that specify the regulators.
required:
- compatible
- reg
- interrupts
- interrupt-names
- regulators
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/leds/common.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
pmic: pmic@60 {
reg = <0x60>;
compatible = "rohm,bd96801";
interrupt-parent = <&gpio1>;
interrupts = <29 IRQ_TYPE_LEVEL_LOW>, <6 IRQ_TYPE_LEVEL_LOW>;
interrupt-names = "intb", "errb";
regulators {
buck1 {
regulator-name = "buck1";
regulator-ramp-delay = <1250>;
/* 0.5V min INITIAL - 150 mV tune */
regulator-min-microvolt = <350000>;
/* 3.3V + 150mV tune */
regulator-max-microvolt = <3450000>;
/* These can be set only when PMIC is in STBY */
rohm,initial-voltage-microvolt = <500000>;
regulator-ov-error-microvolt = <230000>;
regulator-uv-error-microvolt = <230000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-warn-kelvin = <0>;
};
buck2 {
regulator-name = "buck2";
regulator-min-microvolt = <350000>;
regulator-max-microvolt = <3450000>;
rohm,initial-voltage-microvolt = <3000000>;
regulator-ov-error-microvolt = <18000>;
regulator-uv-error-microvolt = <18000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-warn-kelvin = <1>;
};
buck3 {
regulator-name = "buck3";
regulator-min-microvolt = <350000>;
regulator-max-microvolt = <3450000>;
rohm,initial-voltage-microvolt = <600000>;
regulator-ov-warn-microvolt = <18000>;
regulator-uv-warn-microvolt = <18000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-error-kelvin = <0>;
};
buck4 {
regulator-name = "buck4";
regulator-min-microvolt = <350000>;
regulator-max-microvolt = <3450000>;
rohm,initial-voltage-microvolt = <600000>;
regulator-ov-warn-microvolt = <18000>;
regulator-uv-warn-microvolt = <18000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-error-kelvin = <0>;
};
ldo5 {
regulator-name = "ldo5";
regulator-min-microvolt = <300000>;
regulator-max-microvolt = <3300000>;
rohm,initial-voltage-microvolt = <500000>;
regulator-ov-error-microvolt = <36000>;
regulator-uv-error-microvolt = <34000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-warn-kelvin = <0>;
};
ldo6 {
regulator-name = "ldo6";
regulator-min-microvolt = <300000>;
regulator-max-microvolt = <3300000>;
rohm,initial-voltage-microvolt = <300000>;
regulator-ov-error-microvolt = <36000>;
regulator-uv-error-microvolt = <34000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-warn-kelvin = <0>;
};
ldo7 {
regulator-name = "ldo7";
regulator-min-microvolt = <300000>;
regulator-max-microvolt = <3300000>;
rohm,initial-voltage-microvolt = <500000>;
regulator-ov-error-microvolt = <36000>;
regulator-uv-error-microvolt = <34000>;
regulator-temp-protection-kelvin = <1>;
regulator-temp-warn-kelvin = <0>;
};
};
};
};
|
