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- Kernel driver wm831x-hwmon
- ==========================
- Supported chips:
- * Wolfson Microelectronics WM831x PMICs
- Prefix: 'wm831x'
- Datasheet:
- http://www.wolfsonmicro.com/products/WM8310
- http://www.wolfsonmicro.com/products/WM8311
- http://www.wolfsonmicro.com/products/WM8312
- Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
- Description
- -----------
- The WM831x series of PMICs include an AUXADC which can be used to
- monitor a range of system operating parameters, including the voltages
- of the major supplies within the system. Currently the driver provides
- reporting of all the input values but does not provide any alarms.
- Voltage Monitoring
- ------------------
- Voltages are sampled by a 12 bit ADC. Voltages in millivolts are 1.465
- times the ADC value.
- Temperature Monitoring
- ----------------------
- Temperatures are sampled by a 12 bit ADC. Chip and battery temperatures
- are available. The chip temperature is calculated as:
- Degrees celsius = (512.18 - data) / 1.0983
- while the battery temperature calculation will depend on the NTC
- thermistor component.
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