linux/Documentation/devicetree/bindings/hwmon/ads1015.txt
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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    };
  74