| 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. |