> > Is there any documents available describing how regmap_gpio > > populates the GPIO lines? Does it automatically go through and add lines > > for each successful regmap_read and bits per byte? > Nope, it assumes one bit per register or something different if xlate > callback is defined. This is my understanding. That said, it might be > that this is a limitation which does not allow you to switch to that > library. Greetings Andy, Thank you for this feedback. After exploring the gpio_regmap it seems it does not fit my needs. Some of the GPIOs are a combination of several bits in a byte. For instance the Health LED or Identify LED have more than 2 states. If acceptable I believe the gxp-gpio-pl.c file should not use the gpio_regmap. Thanks, -Nick Hawkins