About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Documentation / devicetree / bindings / mfd / max77693.txt




Custom Search

Based on kernel version 4.0. Page generated on 2015-04-14 21:21 EST.

1	Maxim MAX77693 multi-function device
2	
3	MAX77693 is a Multifunction device with the following submodules:
4	- PMIC,
5	- CHARGER,
6	- LED,
7	- MUIC,
8	- HAPTIC
9	
10	It is interfaced to host controller using i2c.
11	This document describes the bindings for the mfd device.
12	
13	Required properties:
14	- compatible : Must be "maxim,max77693".
15	- reg : Specifies the i2c slave address of PMIC block.
16	- interrupts : This i2c device has an IRQ line connected to the main SoC.
17	- interrupt-parent :  The parent interrupt controller.
18	
19	Optional properties:
20	- regulators : The regulators of max77693 have to be instantiated under subnod
21	  named "regulators" using the following format.
22	
23		regulators {
24			regualtor-compatible = ESAFEOUT1/ESAFEOUT2/CHARGER
25			standard regulator constratints[*].
26		};
27	
28		[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
29	
30	- haptic : The MAX77693 haptic device utilises a PWM controlled motor to provide
31	  users with tactile feedback. PWM period and duty-cycle are varied in
32	  order to provide the approprite level of feedback.
33	
34	 Required properties:
35		- compatible : Must be "maxim,max77693-hpatic"
36		- haptic-supply : power supply for the haptic motor
37		[*] refer Documentation/devicetree/bindings/regulator/regulator.txt
38		- pwms : phandle to the physical PWM(Pulse Width Modulation) device.
39		 PWM properties should be named "pwms". And number of cell is different
40		 for each pwm device.
41		 To get more informations, please refer to documentaion.
42		[*] refer Documentation/devicetree/bindings/pwm/pwm.txt
43	
44	- charger : Node configuring the charger driver.
45	  If present, required properties:
46	  - compatible : Must be "maxim,max77693-charger".
47	
48	  Optional properties (if not set, defaults will be used):
49	  - maxim,constant-microvolt : Battery constant voltage in uV. The charger
50	    will operate in fast charge constant current mode till battery voltage
51	    reaches this level. Then the charger will switch to fast charge constant
52	    voltage mode. Also vsys (system voltage) will be set to this value when
53	    DC power is supplied but charger is not enabled.
54	    Valid values: 3650000 - 4400000, step by 25000 (rounded down)
55	    Default: 4200000
56	
57	  - maxim,min-system-microvolt : Minimal system voltage in uV.
58	    Valid values: 3000000 - 3700000, step by 100000 (rounded down)
59	    Default: 3600000
60	
61	  - maxim,thermal-regulation-celsius : Temperature in Celsius for entering
62	    high temperature charging mode. If die temperature exceeds this value
63	    the charging current will be reduced by 105 mA/Celsius.
64	    Valid values: 70, 85, 100, 115
65	    Default: 100
66	
67	  - maxim,battery-overcurrent-microamp : Overcurrent protection threshold
68	    in uA (current from battery to system).
69	    Valid values: 2000000 - 3500000, step by 250000 (rounded down)
70	    Default: 3500000
71	
72	  - maxim,charge-input-threshold-microvolt : Threshold voltage in uV for
73	    triggering input voltage regulation loop. If input voltage decreases
74	    below this value, the input current will be reduced to reach the
75	    threshold voltage.
76	    Valid values: 4300000, 4700000, 4800000, 4900000
77	    Default: 4300000
78	
79	Example:
80		max77693@66 {
81			compatible = "maxim,max77693";
82			reg = <0x66>;
83			interrupt-parent = <&gpx1>;
84			interrupts = <5 2>;
85	
86			regulators {
87				esafeout@1 {
88					regulator-compatible = "ESAFEOUT1";
89					regulator-name = "ESAFEOUT1";
90					regulator-boot-on;
91				};
92				esafeout@2 {
93					regulator-compatible = "ESAFEOUT2";
94					regulator-name = "ESAFEOUT2";
95					};
96				charger@0 {
97					regulator-compatible = "CHARGER";
98					regulator-name = "CHARGER";
99					regulator-min-microamp = <60000>;
100					regulator-max-microamp = <2580000>;
101						regulator-boot-on;
102				};
103			};
104	
105			haptic {
106				compatible = "maxim,max77693-haptic";
107				haptic-supply = <&haptic_supply>;
108				pwms = <&pwm 0 40000 0>;
109				pwm-names = "haptic";
110			};
111	
112			charger {
113				compatible = "maxim,max77693-charger";
114	
115				maxim,constant-microvolt = <4200000>;
116				maxim,min-system-microvolt = <3600000>;
117				maxim,thermal-regulation-celsius = <75>;
118				maxim,battery-overcurrent-microamp = <3000000>;
119				maxim,charge-input-threshold-microvolt = <4300000>;
120			};
121		};
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.