Messages in this thread Patch in this message | | | From | Calvin Johnson <> | Subject | [net-next PATCH v2 2/3] Documentation: ACPI: DSD: Document MDIO PHY | Date | Wed, 1 Jul 2020 11:42:32 +0530 |
| |
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@oss.nxp.com> ---
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(). +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:: + + Scope(\_SB.MCE0.PR17) // 1G + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package (2) {"phy-channel", 1}, + Package (2) {"phy-mode", "rgmii-id"}, + Package (2) {"mdio-handle", Package (){\_SB.MDI0}} + } + }) + } + + Scope(\_SB.MCE0.PR18) // 1G + { + Name (_DSD, Package () { + ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), + Package () { + Package (2) {"phy-channel", 2}, + Package (2) {"phy-mode", "rgmii-id"}, + Package (2) {"mdio-handle", Package (){\_SB.MDI0}} + } + }) + } -- 2.17.1
| |