@@ -49,6 +49,21 @@ phy-mode
The "phy-mode" _DSD property is used to describe the connection to
the PHY. The valid values for "phy-mode" are defined in [4].
+managed
+-------
+Optional property, which specifies the PHY management type.
+The valid values for "managed" are defined in [4].
+
+fixed-link
+----------
+The "fixed-link" is described by a the data-only subnode of the
+MAC port, which is linked in the _DSD package via
+hierarchical data extension (UUID dbb8e3e6-5886-4ba6-8795-1319f52a966b
+in accordance with [5] "_DSD Implementation Guide" document).
+The subnode should comprise a required property ("speed") and
+possibly the optional ones - complete list of parameters and
+their values are specified in [4].
+
The following ASL example illustrates the usage of these properties.
DSDT entry for MDIO node
@@ -121,6 +136,44 @@ phy-mode and phy-handle are used as explained earlier.
})
}
+MAC node example where "managed" property is specified.
+-------------------------------------------------------
+::
+ Scope(\_SB.PP21.ETH0)
+ {
+ Name (_DSD, Package () {
+ ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ Package () {
+ Package () {"phy-mode", "sgmii"},
+ Package () {"managed", "in-band-status"}
+ }
+ })
+ }
+
+MAC node example with a "fixed-link" subnode.
+---------------------------------------------
+::
+ Scope(\_SB.PP21.ETH1)
+ {
+ Name (_DSD, Package () {
+ ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ Package () {
+ Package () {"phy-mode", "sgmii"},
+ },
+ ToUUID("dbb8e3e6-5886-4ba6-8795-1319f52a966b"),
+ Package () {
+ Package () {"fixed-link", "LNK0"}
+ }
+ })
+ Name (LNK0, Package(){ // Data-only subnode of port
+ ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
+ Package () {
+ Package () {"speed", 1000},
+ Package () {"full-duplex", 1}
+ }
+ })
+ }
+
References
==========
@@ -131,3 +184,5 @@ References
[3] Documentation/firmware-guide/acpi/DSD-properties-rules.rst
[4] Documentation/devicetree/bindings/net/ethernet-controller.yaml
+
+[5] https://github.com/UEFI/DSD-Guide/blob/main/dsd-guide.pdf
Document additional MAC configuration modes which can be processed by the existing fwnode_ phylink helpers: * "managed" standard ACPI _DSD property [1] * "fixed-link" data-only subnode linked in the _DSD package via generic mechanism of the hierarchical data extension [2] [1] https://www.uefi.org/sites/default/files/resources/_DSD-device-properties-UUID.pdf [2] https://github.com/UEFI/DSD-Guide/blob/main/dsd-guide.pdf Signed-off-by: Marcin Wojtas <mw@semihalf.com> --- Documentation/firmware-guide/acpi/dsd/phy.rst | 55 ++++++++++++++++++++ 1 file changed, 55 insertions(+)