On Tue, 8 Feb 2022, at 01:34, Andrew Jeffery wrote:
> Hello,
>
> This series adds support for a new register interface supported by the
> Aspeed GPIO controller, present in at least the AST2600.
>
> The new interface is a single register implementing an indirect command
> protocol that allows us to manipulate up to (at least) 208 GPIOs. This
> makes it possible to write very simple drivers for e.g. u-boot and
> jettison the need for the tedious data model required to deal with the
> old register layout.
>
> I've lightly tested the device consistency under Linux. The Linux
> driver is implemented in terms of the old interface, so data model
> consistency can be tested one way by poking the driver using the
> libgpiod tools and then the other using devmem to drive the new
> interface.
>
> Please review!
Naturally further testing revealed some quirks that require further
enhancements to the modelling.
Hold off on doing anything with this series for the moment.
Cheers,
Andrew
