| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 1 | Kernel driver powr1220 |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 2 | ====================== |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 3 | |
| 4 | Supported chips: |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 5 | |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 6 | * Lattice POWR1220AT8 |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 7 | |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 8 | Prefix: 'powr1220' |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 9 | |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 10 | Addresses scanned: none |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 11 | |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 12 | Datasheet: Publicly available at the Lattice website |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 13 | |
| 14 | http://www.latticesemi.com/ |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 15 | |
| 16 | Author: Scott Kanowitz <scott.kanowitz@gmail.com> |
| 17 | |
| 18 | Description |
| 19 | ----------- |
| 20 | |
| 21 | This driver supports the Lattice POWR1220AT8 chip. The POWR1220 |
| 22 | includes voltage monitoring for 14 inputs as well as trim settings |
| 23 | for output voltages and GPIOs. This driver implements the voltage |
| 24 | monitoring portion of the chip. |
| 25 | |
| 26 | Voltages are sampled by a 12-bit ADC with a step size of 2 mV. |
| 27 | An in-line attenuator allows measurements from 0 to 6 V. The |
| 28 | attenuator is enabled or disabled depending on the setting of the |
| 29 | input's max value. The driver will enable the attenuator for any |
| 30 | value over the low measurement range maximum of 2 V. |
| 31 | |
| 32 | The input naming convention is as follows: |
| 33 | |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 34 | ============== ======== |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 35 | driver name pin name |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 36 | ============== ======== |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 37 | in0 VMON1 |
| 38 | in1 VMON2 |
| 39 | in2 VMON3 |
| 40 | in2 VMON4 |
| 41 | in4 VMON5 |
| 42 | in5 VMON6 |
| 43 | in6 VMON7 |
| 44 | in7 VMON8 |
| 45 | in8 VMON9 |
| 46 | in9 VMON10 |
| 47 | in10 VMON11 |
| 48 | in11 VMON12 |
| 49 | in12 VCCA |
| 50 | in13 VCCINP |
| Mauro Carvalho Chehab | b04f2f7 | 2019-04-17 06:46:28 -0300 | [diff] [blame] | 51 | ============== ======== |
| Scott Kanowitz | f4ff415 | 2014-06-12 16:22:15 -0400 | [diff] [blame] | 52 | |
| 53 | The ADC readings are updated on request with a minimum period of 1s. |