mirror of
https://github.com/torvalds/linux.git
synced 2024-12-30 23:02:08 +00:00
4b379fec4e
Signed-off-by: Quentin Schulz <quentin.schulz@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
Microsemi Ocelot SerDes muxing driver
|
|
-------------------------------------
|
|
|
|
On Microsemi Ocelot, there is a handful of registers in HSIO address
|
|
space for setting up the SerDes to switch port muxing.
|
|
|
|
A SerDes X can be "muxed" to work with switch port Y or Z for example.
|
|
One specific SerDes can also be used as a PCIe interface.
|
|
|
|
Hence, a SerDes represents an interface, be it an Ethernet or a PCIe one.
|
|
|
|
There are two kinds of SerDes: SERDES1G supports 10/100Mbps in
|
|
half/full-duplex and 1000Mbps in full-duplex mode while SERDES6G supports
|
|
10/100Mbps in half/full-duplex and 1000/2500Mbps in full-duplex mode.
|
|
|
|
Also, SERDES6G number (aka "macro") 0 is the only interface supporting
|
|
QSGMII.
|
|
|
|
This is a child of the HSIO syscon ("mscc,ocelot-hsio", see
|
|
Documentation/devicetree/bindings/mips/mscc.txt) on the Microsemi Ocelot.
|
|
|
|
Required properties:
|
|
|
|
- compatible: should be "mscc,vsc7514-serdes"
|
|
- #phy-cells : from the generic phy bindings, must be 2.
|
|
The first number defines the input port to use for a given
|
|
SerDes macro. The second defines the macro to use. They are
|
|
defined in dt-bindings/phy/phy-ocelot-serdes.h
|
|
|
|
Example:
|
|
|
|
serdes: serdes {
|
|
compatible = "mscc,vsc7514-serdes";
|
|
#phy-cells = <2>;
|
|
};
|
|
|
|
ethernet {
|
|
port1 {
|
|
phy-handle = <&phy_foo>;
|
|
/* Link SERDES1G_5 to port1 */
|
|
phys = <&serdes 1 SERDES1G_5>;
|
|
};
|
|
};
|