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Documentation / devicetree / bindings / mfd / as3711.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:01 EST.

1	AS3711 is an I2C PMIC from Austria MicroSystems with multiple DCDC and LDO power
2	supplies, a battery charger and an RTC. So far only bindings for the two stepup
3	DCDC converters are defined. Other DCDC and LDO supplies are configured, using
4	standard regulator properties, they must belong to a sub-node, called
5	"regulators" and be called "sd1" to "sd4" and "ldo1" to "ldo8." Stepup converter
6	configuration should be placed in a subnode, called "backlight."
7	
8	Compulsory properties:
9	- compatible		: must be "ams,as3711"
10	- reg			: specifies the I2C address
11	
12	To use the SU1 converter as a backlight source the following two properties must
13	be provided:
14	- su1-dev		: framebuffer phandle
15	- su1-max-uA		: maximum current
16	
17	To use the SU2 converter as a backlight source the following two properties must
18	be provided:
19	- su2-dev		: framebuffer phandle
20	- su1-max-uA		: maximum current
21	
22	Additionally one of these properties must be provided to select the type of
23	feedback used:
24	- su2-feedback-voltage	: voltage feedback is used
25	- su2-feedback-curr1	: CURR1 input used for current feedback
26	- su2-feedback-curr2	: CURR2 input used for current feedback
27	- su2-feedback-curr3	: CURR3 input used for current feedback
28	- su2-feedback-curr-auto: automatic current feedback selection
29	
30	and one of these to select the over-voltage protection pin
31	- su2-fbprot-lx-sd4	: LX_SD4 is used for over-voltage protection
32	- su2-fbprot-gpio2	: GPIO2 is used for over-voltage protection
33	- su2-fbprot-gpio3	: GPIO3 is used for over-voltage protection
34	- su2-fbprot-gpio4	: GPIO4 is used for over-voltage protection
35	
36	If "su2-feedback-curr-auto" is selected, one or more of the following properties
37	have to be specified:
38	- su2-auto-curr1	: use CURR1 input for current feedback
39	- su2-auto-curr2	: use CURR2 input for current feedback
40	- su2-auto-curr3	: use CURR3 input for current feedback
41	
42	Example:
43	
44	as3711@40 {
45		compatible = "ams,as3711";
46		reg = <0x40>;
47	
48		regulators {
49			sd4 {
50				regulator-name = "1.215V";
51				regulator-min-microvolt = <1215000>;
52				regulator-max-microvolt = <1235000>;
53			};
54			ldo2 {
55				regulator-name = "2.8V CPU";
56				regulator-min-microvolt = <2800000>;
57				regulator-max-microvolt = <2800000>;
58				regulator-always-on;
59				regulator-boot-on;
60			};
61		};
62	
63		backlight {
64			compatible = "ams,as3711-bl";
65			su2-dev = <&lcdc>;
66			su2-max-uA = <36000>;
67			su2-feedback-curr-auto;
68			su2-fbprot-gpio4;
69			su2-auto-curr1;
70			su2-auto-curr2;
71			su2-auto-curr3;
72		};
73	};
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