On 2018/11/9 7:23, Andrew Lunn wrote: > I'm just trying to ensure whatever is defined is flexible enough that > we really can later support everything which DT does. We have PHYs on > MDIO busses, inside switches, which are on MDIO busses, which are > inside Ethernet interfaces, etc. > > An MDIO bus is very similar to an i2c bus. How is that described in > ACPI? Anything we can learn from that? All the documents I've seen are from UEFII/ACPICA and I have not seen any independent description of MDIO in the ACPI documents. Maybe I missed a document, too. I think not all devices need to be described in ACPI. The ACPI defines what should be included in a device, as well as some special definitions. Our MDIO doesn't need a special definition, because it's enough to use a generic ACPI description. I think that's why MDIO doesn't have a separate description. Cheers, Dongsheng
