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authorLinus Torvalds <torvalds@linux-foundation.org>2011-03-21 17:02:55 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2011-03-21 17:02:55 -0400
commitafd8c40431cc9e3b468a506cbf9957ffca3466fe (patch)
tree7d5b54557a67de132d62fcb0b43184a4969644d0 /Documentation/devicetree
parent366f7e7a79b19bd8c4e8f55fdf12b81538d1a7a4 (diff)
parentc0046867f34bb81ec3f237ebbc5241ae678b8379 (diff)
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: hwmon: (ads1015) Make gain and datarate configurable hwmon: (ads1015) Drop dynamic attribute group hwmon: Add support for Texas Instruments ADS1015 hwmon: New driver for SMSC SCH5627 hwmon: (abituguru*) Update my email address hwmon: (lm75) Speed up detection hwmon: (lm75) Add detection of the National Semiconductor LM75A hp_accel: Fix driver name Move lis3lv02d drivers to drivers/misc Move hp_accel to drivers/platform/x86 Let Kconfig handle lis3lv02d dependencies hwmon: (sht15) Fix integer overflow in humidity calculation hwmon: (sht15) Spelling fix hwmon: (w83795) Document pin mapping
Diffstat (limited to 'Documentation/devicetree')
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1ADS1015 (I2C)
2
3This device is a 12-bit A-D converter with 4 inputs.
4
5The inputs can be used single ended or in certain differential combinations.
6
7For configuration all possible combinations are mapped to 8 channels:
8 0: Voltage over AIN0 and AIN1.
9 1: Voltage over AIN0 and AIN3.
10 2: Voltage over AIN1 and AIN3.
11 3: Voltage over AIN2 and AIN3.
12 4: Voltage over AIN0 and GND.
13 5: Voltage over AIN1 and GND.
14 6: Voltage over AIN2 and GND.
15 7: Voltage over AIN3 and GND.
16
17Each channel can be configured individually:
18 - pga is the programmable gain amplifier (values are full scale)
19 0: +/- 6.144 V
20 1: +/- 4.096 V
21 2: +/- 2.048 V (default)
22 3: +/- 1.024 V
23 4: +/- 0.512 V
24 5: +/- 0.256 V
25 - data_rate in samples per second
26 0: 128
27 1: 250
28 2: 490
29 3: 920
30 4: 1600 (default)
31 5: 2400
32 6: 3300
33
341) The /ads1015 node
35
36 Required properties:
37
38 - compatible : must be "ti,ads1015"
39 - reg : I2C bus address of the device
40 - #address-cells : must be <1>
41 - #size-cells : must be <0>
42
43 The node contains child nodes for each channel that the platform uses.
44
45 Example ADS1015 node:
46
47 ads1015@49 {
48 compatible = "ti,ads1015";
49 reg = <0x49>;
50 #address-cells = <1>;
51 #size-cells = <0>;
52
53 [ child node definitions... ]
54 }
55
562) channel nodes
57
58 Required properties:
59
60 - reg : the channel number
61
62 Optional properties:
63
64 - ti,gain : the programmable gain amplifier setting
65 - ti,datarate : the converter data rate
66
67 Example ADS1015 channel node:
68
69 channel@4 {
70 reg = <4>;
71 ti,gain = <3>;
72 ti,datarate = <5>;
73 };