Re: [net-next PATCH v5 01/15] Documentation: ACPI: DSD: Document MDIO PHY
From: Randy Dunlap <hidden>
Date: 2021-02-08 21:08:36
Also in:
linux-acpi, lkml, netdev
Hi, Just a couple of nits below: On 2/8/21 7:12 AM, Calvin Johnson wrote:
Introduce ACPI mechanism to get PHYs registered on a MDIO bus and provide them to be connected to MAC. Describe properties "phy-handle" and "phy-mode". Signed-off-by: Calvin Johnson <redacted> ---
quoted hunk ↗ jump to hunk
Documentation/firmware-guide/acpi/dsd/phy.rst | 133 ++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 Documentation/firmware-guide/acpi/dsd/phy.rstdiff --git a/Documentation/firmware-guide/acpi/dsd/phy.rst b/Documentation/firmware-guide/acpi/dsd/phy.rst new file mode 100644 index 000000000000..e1e99cae5eb2 --- /dev/null +++ b/Documentation/firmware-guide/acpi/dsd/phy.rst@@ -0,0 +1,133 @@ +.. SPDX-License-Identifier: GPL-2.0 + +========================= +MDIO bus and PHYs in ACPI +========================= + +The PHYs on an MDIO bus [1] are probed and registered using +fwnode_mdiobus_register_phy(). + +Later, for connecting these PHYs to MAC, the PHYs registered on the
to a MAC,
+MDIO bus have to be referenced. + +This document introduces two _DSD properties that are to be used +for connecting PHYs on the MDIO bus [3] to the MAC layer. + +These properties are defined in accordance with the "Device +Properties UUID For _DSD" [2] document and the +daffd814-6eba-4d8c-8a91-bc9bbf4aa301 UUID must be used in the Device +Data Descriptors containing them. + +phy-handle +----------
...
+ +Later, during the MAC driver initialization, the registered PHY devices +have to be retrieved from the MDIO bus. For this, the MAC driver need
needs
+references to the previously registered PHYs which are provided +as device object references (e.g. \_SB.MDI0.PHY1).
thanks. -- ~Randy _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel