Re: [RFC v2 01/39] Kconfig: introduce HAS_IOPORT option and select it as necessary

Maciej W. Rozycki
2022-05-06T13:40:25Z

On Fri, 6 May 2022, Geert Uytterhoeven wrote:

> A loooong time ago, it was suggested to add register accessor
> functions to struct device, so e.g. readl(dev, offset) would call
> into these accessors, which would implement the bus-specific behavior.
> No more worries about readl(), __raw_readl(), ioread32b(), or whatever
> quirk is needed, at the (small on nowadays' machines) expense of
> some indirection...

I guess you'd need an additional parameter for the endianness policy
required (to match either bit or byte lanes, according to ultimate data
interpretation) where crossing between buses of a different endianness
each. Otherwise you'd end up with the mess elsewhere.

Maciej