2c9d5b5e32
A driver for ADS1015 with more functionality is available in the iio subsystem. Remove the hwmon driver as duplicate. If the chip is used for hardware monitoring, the iio->hwmon bridge should be used. Cc: Dirk Eibach <eibach@gdsys.de> Link: https://lore.kernel.org/r/1562004758-13025-1-git-send-email-linux@roeck-us.net Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
74 lines
1.6 KiB
Plaintext
74 lines
1.6 KiB
Plaintext
ADS1015 (I2C)
|
|
|
|
This device is a 12-bit A-D converter with 4 inputs.
|
|
|
|
The inputs can be used single ended or in certain differential combinations.
|
|
|
|
For configuration all possible combinations are mapped to 8 channels:
|
|
0: Voltage over AIN0 and AIN1.
|
|
1: Voltage over AIN0 and AIN3.
|
|
2: Voltage over AIN1 and AIN3.
|
|
3: Voltage over AIN2 and AIN3.
|
|
4: Voltage over AIN0 and GND.
|
|
5: Voltage over AIN1 and GND.
|
|
6: Voltage over AIN2 and GND.
|
|
7: Voltage over AIN3 and GND.
|
|
|
|
Each channel can be configured individually:
|
|
- pga is the programmable gain amplifier (values are full scale)
|
|
0: +/- 6.144 V
|
|
1: +/- 4.096 V
|
|
2: +/- 2.048 V (default)
|
|
3: +/- 1.024 V
|
|
4: +/- 0.512 V
|
|
5: +/- 0.256 V
|
|
- data_rate in samples per second
|
|
0: 128
|
|
1: 250
|
|
2: 490
|
|
3: 920
|
|
4: 1600 (default)
|
|
5: 2400
|
|
6: 3300
|
|
|
|
1) The /ads1015 node
|
|
|
|
Required properties:
|
|
|
|
- compatible : must be "ti,ads1015"
|
|
- reg : I2C bus address of the device
|
|
- #address-cells : must be <1>
|
|
- #size-cells : must be <0>
|
|
|
|
The node contains child nodes for each channel that the platform uses.
|
|
|
|
Example ADS1015 node:
|
|
|
|
ads1015@49 {
|
|
compatible = "ti,ads1015";
|
|
reg = <0x49>;
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
|
|
[ child node definitions... ]
|
|
}
|
|
|
|
2) channel nodes
|
|
|
|
Required properties:
|
|
|
|
- reg : the channel number
|
|
|
|
Optional properties:
|
|
|
|
- ti,gain : the programmable gain amplifier setting
|
|
- ti,datarate : the converter data rate
|
|
|
|
Example ADS1015 channel node:
|
|
|
|
channel@4 {
|
|
reg = <4>;
|
|
ti,gain = <3>;
|
|
ti,datarate = <5>;
|
|
};
|