Re: [PATCH] serial: 8250_it8768e: Create iTE IT8768E specific 8250 driver

[Arnd Bergmann]

On Mon, Jan 13, 2025, at 13:20, Andy Shevchenko wrote:
> On Mon, Jan 13, 2025 at 11:36:08AM +0100, Arnd Bergmann wrote:
>> On Mon, Jan 13, 2025, at 10:59, Andy Shevchenko wrote:
>> > On Thu, Jan 09, 2025 at 01:40:14PM +0100, Arnd Bergmann wrote:
>> >> On Thu, Jan 9, 2025, at 13:08, WangYuli wrote:
>> >> 
>> >> Can you explain why this isn't done as part of
>> >> drivers/tty/serial/8250/8250_pnp.c?
>> >
>> > I assume you meant 8250_platform.c. PNP is for devices went through legacy PNP
>> > enumeration, most likely having IOPORT instead of IOMEM.
>> 
>> No, I meant the 8250_pnp.c file.
>
> I am puzzled then. How should it work? PNP ID != ACPI HID that's provided in
> this patch commit message. On top of that, PNP driver uses _legacy_ PMP bus
> and infrastructure.

I guess I don't understand enough about ACPI then, I always
assumed these were the same identifiers. I do see that
CONFIG_ACPI force-enables CONFIG_PNP, and I see the examples in
https://uefi.org/htmlspecs/ACPI_Spec_6_4_html/06_Device_Configuration/ evice_Configuration.html
refer to _HID values in the form of "PNP####". 

     Arnd