| Kernel driver powr1220 |
| ================== |
| |
| Supported chips: |
| * Lattice POWR1220AT8 |
| Prefix: 'powr1220' |
| Addresses scanned: none |
| Datasheet: Publicly available at the Lattice website |
| http://www.latticesemi.com/ |
| |
| Author: Scott Kanowitz <scott.kanowitz@gmail.com> |
| |
| Description |
| ----------- |
| |
| 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: |
| |
| driver name pin name |
| in0 VMON1 |
| in1 VMON2 |
| in2 VMON3 |
| in2 VMON4 |
| in4 VMON5 |
| in5 VMON6 |
| in6 VMON7 |
| in7 VMON8 |
| in8 VMON9 |
| in9 VMON10 |
| in10 VMON11 |
| in11 VMON12 |
| in12 VCCA |
| in13 VCCINP |
| |
| The ADC readings are updated on request with a minimum period of 1s. |
