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).