1 Kernel driver wm831x-hwmon
2 ==========================
5 * Wolfson Microelectronics WM831x PMICs
8 http://www.wolfsonmicro.com/products/WM8310
9 http://www.wolfsonmicro.com/products/WM8311
10 http://www.wolfsonmicro.com/products/WM8312
12 Authors: Mark Brown <broonie@opensource.wolfsonmicro.com>
17 The WM831x series of PMICs include an AUXADC which can be used to
18 monitor a range of system operating parameters, including the voltages
19 of the major supplies within the system. Currently the driver provides
20 reporting of all the input values but does not provide any alarms.
25 Voltages are sampled by a 12 bit ADC. Voltages in milivolts are 1.465
28 Temperature Monitoring
29 ----------------------
31 Temperatures are sampled by a 12 bit ADC. Chip and battery temperatures
32 are available. The chip temperature is calculated as:
34 Degrees celsius = (512.18 - data) / 1.0983
36 while the battery temperature calculation will depend on the NTC