On Fri, Feb 28, 2020 at 11:18:51PM +0800, John Garry wrote:
> The Huawei D06 board (and variants) can support Quad mode of operation.
> 
> Since we have no current method in ACPI SPI bus device resource description
> to describe this information, use DMI to detect the board, and set the
> controller buswidth override bits.

Hopefully this is something that the ACPI people will be looking to
address going forwards :/