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1Maxim MAX14577/77836 Multi-Function Device
2
3MAX14577 is a Multi-Function Device with Micro-USB Interface Circuit, Li+
4Battery Charger and SFOUT LDO output for powering USB devices. It is
5interfaced to host controller using I2C.
6
7MAX77836 additionally contains PMIC (with two LDO regulators) and Fuel Gauge.
8
9
10Required properties:
11- compatible : Must be "maxim,max14577" or "maxim,max77836".
12- reg : I2C slave address for the max14577 chip (0x25 for max14577/max77836)
13- interrupts : IRQ line for the chip.
14
15
16Required nodes:
17 - charger :
18 Node for configuring the charger driver.
19 Required properties:
20 - compatible : "maxim,max14577-charger"
21 or "maxim,max77836-charger"
22 - maxim,fast-charge-uamp : Current in uA for Fast Charge;
23 Valid values:
24 - for max14577: 90000 - 950000;
25 - for max77836: 45000 - 475000;
26 - maxim,eoc-uamp : Current in uA for End-Of-Charge mode;
27 Valid values:
28 - for max14577: 50000 - 200000;
29 - for max77836: 5000 - 100000;
30 - maxim,ovp-uvolt : OverVoltage Protection Threshold in uV;
31 In an overvoltage condition, INT asserts and charging
32 stops. Valid values:
33 - 6000000, 6500000, 7000000, 7500000;
34 - maxim,constant-uvolt : Battery Constant Voltage in uV;
35 Valid values:
36 - 4000000 - 4280000 (step by 20000);
37 - 4350000;
38
39
40Optional nodes:
41- max14577-muic/max77836-muic :
42 Node used only by extcon consumers.
43 Required properties:
44 - compatible : "maxim,max14577-muic" or "maxim,max77836-muic"
45
46- regulators :
47 Required properties:
48 - compatible : "maxim,max14577-regulator"
49 or "maxim,max77836-regulator"
50
51 May contain a sub-node per regulator from the list below. Each
52 sub-node should contain the constraints and initialization information
53 for that regulator. See regulator.txt for a description of standard
54 properties for these sub-nodes.
55
56 List of valid regulator names:
57 - for max14577: CHARGER, SAFEOUT.
58 - for max77836: CHARGER, SAFEOUT, LDO1, LDO2.
59
60 The SAFEOUT is a fixed voltage regulator so there is no need to specify
61 voltages for it.
62
63
64Example:
65
66#include <dt-bindings/interrupt-controller/irq.h>
67
68max14577@25 {
69 compatible = "maxim,max14577";
70 reg = <0x25>;
71 interrupt-parent = <&gpx1>;
72 interrupts = <5 IRQ_TYPE_NONE>;
73
74 muic: max14577-muic {
75 compatible = "maxim,max14577-muic";
76 };
77
78 regulators {
79 compatible = "maxim,max14577-regulator";
80
81 SAFEOUT {
82 regulator-name = "SAFEOUT";
83 };
84 CHARGER {
85 regulator-name = "CHARGER";
86 regulator-min-microamp = <90000>;
87 regulator-max-microamp = <950000>;
88 regulator-boot-on;
89 };
90 };
91
92 charger {
93 compatible = "maxim,max14577-charger";
94
95 maxim,constant-uvolt = <4350000>;
96 maxim,fast-charge-uamp = <450000>;
97 maxim,eoc-uamp = <50000>;
98 maxim,ovp-uvolt = <6500000>;
99 };
100};
101
102
103max77836@25 {
104 compatible = "maxim,max77836";
105 reg = <0x25>;
106 interrupt-parent = <&gpx1>;
107 interrupts = <5 IRQ_TYPE_NONE>;
108
109 muic: max77836-muic {
110 compatible = "maxim,max77836-muic";
111 };
112
113 regulators {
114 compatible = "maxim,max77836-regulator";
115
116 SAFEOUT {
117 regulator-name = "SAFEOUT";
118 };
119 CHARGER {
120 regulator-name = "CHARGER";
121 regulator-min-microamp = <90000>;
122 regulator-max-microamp = <950000>;
123 regulator-boot-on;
124 };
125 LDO1 {
126 regulator-name = "LDO1";
127 regulator-min-microvolt = <2700000>;
128 regulator-max-microvolt = <2700000>;
129 };
130 LDO2 {
131 regulator-name = "LDO2";
132 regulator-min-microvolt = <800000>;
133 regulator-max-microvolt = <3950000>;
134 };
135 };
136
137 charger {
138 compatible = "maxim,max77836-charger";
139
140 maxim,constant-uvolt = <4350000>;
141 maxim,fast-charge-uamp = <225000>;
142 maxim,eoc-uamp = <7500>;
143 maxim,ovp-uvolt = <6500000>;
144 };
145};