| Datasheet: Publicly available at the Lattice website |
| http://www.latticesemi.com/ |
| Author: Scott Kanowitz <scott.kanowitz@gmail.com> |
| This driver supports the Lattice POWR1220AT8 chip. The POWR1220 |
| includes voltage monitoring for 14 inputs as well as trim settings |
| for output voltages and GPIOs. This driver implements the voltage |
| monitoring portion of the chip. |
| Voltages are sampled by a 12-bit ADC with a step size of 2 mV. |
| An in-line attenuator allows measurements from 0 to 6 V. The |
| attenuator is enabled or disabled depending on the setting of the |
| input's max value. The driver will enable the attenuator for any |
| value over the low measurement range maximum of 2 V. |
| The input naming convention is as follows: |
| The ADC readings are updated on request with a minimum period of 1s. |