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    SubjectRe: [net-next: PATCH 09/12] Documentation: ACPI: DSD: introduce DSA description
    On Wed, Jun 22, 2022 at 01:22:15PM +0200, Andrew Lunn wrote:
    > > > It's not device on MDIO bus, but the MDIO controller's register itself
    > > > (this _CSR belongs to the parent, subnodes do not refer to it in any
    > > > way). The child device requires only _ADR (or whatever else is needed
    > > > for the case the DSA device is attached to SPI/I2C controllers).
    > >
    > > More and more the idea of standardizing the MDIOSerialBus() resource looks
    > > plausible. The _ADR() usage is a bit grey area in ACPI specification. Maybe
    > > someone can also make it descriptive, so Microsoft and others won't utilize
    > > _ADR() in any level of weirdness.
    >
    > I don't know if it makes any difference, but there are two protocols
    > spoken over MDIO, c22 and c45, specified in clause 22 and clause 45 of
    > the 802.3 specification. In some conditions, you need to specify which
    > protocol to speak to a device at a particular address. In DT we
    > indicate this with the compatible string, when maybe it should really
    > be considered as an extension of the address.
    >
    > If somebody does produce a draft for MDIOSerialBus() i'm happy to
    > review it.

    I also can review it. Marcin, would it be hard for you to prepare a formal
    proposal for ACPI specification?

    --
    With Best Regards,
    Andy Shevchenko


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