Re: [PATCH v1 1/4] fbtft: Unorphan the driver

On Mon, Jan 31, 2022 at 02:55:21PM +0100, Javier Martinez Canillas wrote:

On 1/31/22 14:23, Andy Shevchenko wrote:

quoted

On Mon, Jan 31, 2022 at 01:08:32PM +0100, Javier Martinez Canillas wrote:

...

quoted

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