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Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.

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