Re: [net-next PATCH v2 2/3] Documentation: ACPI: DSD: Document MDIO PHY

[Randy Dunlap]

On 6/30/20 11:12 PM, Calvin Johnson wrote:
> Introduce ACPI mechanism to get PHYs registered on a MDIO bus and
> provide them to be connected to MAC.
> 
> An ACPI node property "mdio-handle" is introduced to reference the
> MDIO bus on which PHYs are registered with autoprobing method used
> by mdiobus_register().
> 
> Signed-off-by: Calvin Johnson <calvin.johnson@xxxxxxxxxxx>
> ---
> 
> Changes in v2: None
> 
>  Documentation/firmware-guide/acpi/dsd/phy.rst | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/firmware-guide/acpi/dsd/phy.rst
> 
> diff --git a/Documentation/firmware-guide/acpi/dsd/phy.rst b/Documentation/firmware-guide/acpi/dsd/phy.rst
> new file mode 100644
> index 000000000000..78dcb0cacc7e
> --- /dev/null
> +++ b/Documentation/firmware-guide/acpi/dsd/phy.rst
> @@ -0,0 +1,40 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +=========================
> +MDIO bus and PHYs in ACPI
> +=========================
> +
> +The PHYs on a mdiobus are probed and registered using mdiobus_register().

            on an mdiobus (?)

> +Later, for connecting these PHYs to MAC, the PHYs registered on the
> +mdiobus have to be referenced.
> +
> +For each MAC node, a property "mdio-handle" is used to reference the
> +MDIO bus on which the PHYs are registered. On getting hold of the MDIO
> +bus, use find_phy_device() to get the PHY connected to the MAC.
> +
> +
> +An example of this is show below::

                         shown

> +
> +	Scope(\_SB.MCE0.PR17) // 1G


-- 
~Randy