On Mon, Jan 31, 2022 at 02:55:21PM +0100, Javier Martinez Canillas wrote: > On 1/31/22 14:23, Andy Shevchenko wrote: > > On Mon, Jan 31, 2022 at 01:08:32PM +0100, Javier Martinez Canillas wrote: ... > > The tricky part is the PRP0001 > > ACPI PNP ID that allows to reuse it on ACPI-based platforms. > > Oh, I wasn't aware about PRP0001. I've read about it at: > > https://www.kernel.org/doc/Documentation/acpi/enumeration.txt Yep! The idea is that new drivers for discrete (and sometimes even on-SoC) components should be platform-agnostic (means no strict OF / ACPI dependencies), so anybody can prototype devices on either of the platforms. As a matter of fact IIO subsystem is leading in this by cleaning up most of the drivers towards that goal. OF/ACPI explicit dependency makes sense when we 100+% sure that IP in question won't ever appear on the other type of platform (which I believe is very rare nowadays for most of the components). -- With Best Regards, Andy Shevchenko
