Re: [PATCH] docs: i2c: piix4: Add ACPI section

[Andy Shevchenko]

On Mon, Nov 11, 2024 at 02:56:52PM +0300, Konstantin Aladyshev wrote:
> Provide information how to reference I2C busses created by the PIIX4
> chip driver from the ACPI code.

...

> +Therefore if you want to access one of these busses in the ACPI code, you need to
> +declare port subdevices inside the PIIX device::
> +
> +    Scope (\_SB_.PCI0.SMBS)
> +    {
> +        Name (_ADR, 0x00140000)
> +
> +        Device (SMB0) {
> +            Name (_ADR, 0)
> +        }
> +        Device (SMB1) {
> +            Name (_ADR, 1)
> +        }
> +        Device (SMB2) {
> +            Name (_ADR, 2)
> +        }
> +    }

You need to elaborate that some of this data may be already present in the BIOS
DSDT (you give your example as it seems most common so far) and hence requires
an additional per-port addresses. With that you should add a note that this
will require to load SSDT quite in advance to make sure that the driver will
see these changes before its ->probe().

...

The rest is LGTM.

-- 
With Best Regards,
Andy Shevchenko