NOTE that this driver is not yet platform agnostic, as it relies on
cortex_m for a delay.
This driver optionally takes a digital output pin to control power to the LP55231. It will drive the pin (digital) high on power-on, and (digital) low on power-off.
I2C registers of the LP55231
The LP55231 device
Available I2C addresses for the part
Enumeration of the 9 LED lines from the chip
Error conditions returned by the LP55231