Re: Assigning fixed numbers to i2c buses via ACPI code

Andy Shevchenko
2025-02-12T13:31:21Z

On Wed, Feb 12, 2025 at 03:37:22PM +0300, Konstantin Aladyshev wrote:
> Don't get me wrong, I'm not trying to defend a solution with aliases.

I'm not assuming you defend it, just telling you that, yeah, design of
some solutions in the user space WRT HW finding and identification is
broken. And OF alias approach was maybe a mistake to work around that.

> It is just there is existing code that relies on fixed i2c bus
> numbers, and I was just trying to understand if it can be ported to
> x86 easily.

If you do it correctly from day 1, there porting will not be needed *at all*
independently on the architecture (it will work even on legacy non-OF/non-ACPI
platforms as good as on newest ones). That's my point.

> Apparently it can't.

It can't be done in current code base, but one may patch the kernel and
the ACPI tables to achieve that. I do not think it's a practical solution,
though.

> Thanks for the answer!

You're welcome!