On Fri, Aug 02, 2019 at 02:55:26PM +0200, Jean Delvare wrote:
> Enable the i2c-piix4 SMBus controller driver to enumerate I2C slave
> devices using ACPI. It builds on the related I2C mux device work
> in commit 8eb5c87a92c0 ("i2c: add ACPI support for I2C mux ports")
>
> In the i2c-piix4 driver the adapters are enumerated as:
> Main SMBus adapter Port 0, Port 2, ..., aux port (i.e., ASF adapter)
>
> However, in the AMD BKDG documentation[1], the implied order of ports is:
> Main SMBus adapter Port 0, ASF adapter, Port 2, Port 3, ...
>
> This ordering difference is unfortunate. We assume that ACPI
> developers will use the AMD documentation ordering, so we have to
> pass an extra parameter to piix4_add_adapter().
>
> [1] 52740 BIOS and Kernel Developer's Guide (BKDG) for AMD Family 16h
> Models 30h-3Fh Processors
>
> Based on earlier work by Andrew Cooks.
>
> Reported-by: Andrew Cooks <[email protected]>
> Signed-off-by: Jean Delvare <[email protected]>Applied to for-next, thanks!
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