MAX14906 in 4 channel I/O with advanced diagnostic.
In SPI communication diagnostic status transmitted on every
READ/WRITE which includes generic status of chip.
Configuration both on global level and on per channel bases.
Diagnostics includes :
* Thermal overload
* current limit
* open wire detection
* short to VDD
* Above VDD
* Safe DEmagnitization fault
* VDD warning
* VDD low
* SPI/CRC Error
* WDog Error
* Loss GND
Add app.overlay for MAX14906 driver.
Tested with adopted basic/button and basic/blinky sample.
Signed-off-by: Stoyan Bogdanov <sbogdanov@baylibre.com>
