| 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. |