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Based on kernel version 3.9. Page generated on 2013-05-02 23:07 EST.

1	Kernel driver ads1015
2	=====================
3	
4	Supported chips:
5	  * Texas Instruments ADS1015
6	    Prefix: 'ads1015'
7	    Datasheet: Publicly available at the Texas Instruments website :
8	               http://focus.ti.com/lit/ds/symlink/ads1015.pdf
9	
10	Authors:
11	        Dirk Eibach, Guntermann & Drunck GmbH <eibach@gdsys.de>
12	
13	Description
14	-----------
15	
16	This driver implements support for the Texas Instruments ADS1015.
17	
18	This device is a 12-bit A-D converter with 4 inputs.
19	
20	The inputs can be used single ended or in certain differential combinations.
21	
22	The inputs can be made available by 8 sysfs input files in0_input - in7_input:
23	in0: Voltage over AIN0 and AIN1.
24	in1: Voltage over AIN0 and AIN3.
25	in2: Voltage over AIN1 and AIN3.
26	in3: Voltage over AIN2 and AIN3.
27	in4: Voltage over AIN0 and GND.
28	in5: Voltage over AIN1 and GND.
29	in6: Voltage over AIN2 and GND.
30	in7: Voltage over AIN3 and GND.
31	
32	Which inputs are available can be configured using platform data or devicetree.
33	
34	By default all inputs are exported.
35	
36	Platform Data
37	-------------
38	
39	In linux/i2c/ads1015.h platform data is defined, channel_data contains
40	configuration data for the used input combinations:
41	- pga is the programmable gain amplifier (values are full scale)
42	  0: +/- 6.144 V
43	  1: +/- 4.096 V
44	  2: +/- 2.048 V
45	  3: +/- 1.024 V
46	  4: +/- 0.512 V
47	  5: +/- 0.256 V
48	- data_rate in samples per second
49	  0: 128
50	  1: 250
51	  2: 490
52	  3: 920
53	  4: 1600
54	  5: 2400
55	  6: 3300
56	
57	Example:
58	struct ads1015_platform_data data = {
59		.channel_data = {
60			[2] = { .enabled = true, .pga = 1, .data_rate = 0 },
61			[4] = { .enabled = true, .pga = 4, .data_rate = 5 },
62		}
63	};
64	
65	In this case only in2_input (FS +/- 4.096 V, 128 SPS) and in4_input
66	(FS +/- 0.512 V, 2400 SPS) would be created.
67	
68	Devicetree
69	----------
70	
71	Configuration is also possible via devicetree:
72	Documentation/devicetree/bindings/hwmon/ads1015.txt
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