Re: [PATCH v3 2/5] gpio: gxp: Add HPE GXP GPIO

From: Hawkins, Nick
Date: Thu Jun 08 2023 - 10:58:35 EST



> > 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