mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 20:45:31 +07:00
5b8b64843a
Add device tree binding documentation for the Synopsys DWC Ethernet QoS driver supporting revision 4.10a of the hardware IP. Signed-off-by: Lars Persson <larper@axis.com> Signed-off-by: David S. Miller <davem@davemloft.net>
76 lines
2.6 KiB
Plaintext
76 lines
2.6 KiB
Plaintext
* Synopsys DWC Ethernet QoS IP version 4.10 driver (GMAC)
|
|
|
|
|
|
Required properties:
|
|
- compatible: Should be "snps,dwc-qos-ethernet-4.10"
|
|
- reg: Address and length of the register set for the device
|
|
- clocks: Phandles to the reference clock and the bus clock
|
|
- clock-names: Should be "phy_ref_clk" for the reference clock and "apb_pclk"
|
|
for the bus clock.
|
|
- interrupt-parent: Should be the phandle for the interrupt controller
|
|
that services interrupts for this device
|
|
- interrupts: Should contain the core's combined interrupt signal
|
|
- phy-mode: See ethernet.txt file in the same directory
|
|
|
|
Optional properties:
|
|
- dma-coherent: Present if dma operations are coherent
|
|
- mac-address: See ethernet.txt in the same directory
|
|
- local-mac-address: See ethernet.txt in the same directory
|
|
- snps,en-lpi: If present it enables use of the AXI low-power interface
|
|
- snps,write-requests: Number of write requests that the AXI port can issue.
|
|
It depends on the SoC configuration.
|
|
- snps,read-requests: Number of read requests that the AXI port can issue.
|
|
It depends on the SoC configuration.
|
|
- snps,burst-map: Bitmap of allowed AXI burst lengts, with the LSB
|
|
representing 4, then 8 etc.
|
|
- snps,txpbl: DMA Programmable burst length for the TX DMA
|
|
- snps,rxpbl: DMA Programmable burst length for the RX DMA
|
|
- snps,en-tx-lpi-clockgating: Enable gating of the MAC TX clock during
|
|
TX low-power mode.
|
|
- phy-handle: See ethernet.txt file in the same directory
|
|
- mdio device tree subnode: When the GMAC has a phy connected to its local
|
|
mdio, there must be device tree subnode with the following
|
|
required properties:
|
|
- compatible: Must be "snps,dwc-qos-ethernet-mdio".
|
|
- #address-cells: Must be <1>.
|
|
- #size-cells: Must be <0>.
|
|
|
|
For each phy on the mdio bus, there must be a node with the following
|
|
fields:
|
|
|
|
- reg: phy id used to communicate to phy.
|
|
- device_type: Must be "ethernet-phy".
|
|
- fixed-mode device tree subnode: see fixed-link.txt in the same directory
|
|
|
|
Examples:
|
|
ethernet2@40010000 {
|
|
clock-names = "phy_ref_clk", "apb_pclk";
|
|
clocks = <&clkc 17>, <&clkc 15>;
|
|
compatible = "snps,dwc-qos-ethernet-4.10";
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <0x0 0x1e 0x4>;
|
|
reg = <0x40010000 0x4000>;
|
|
phy-handle = <&phy2>;
|
|
phy-mode = "gmii";
|
|
|
|
snps,en-tx-lpi-clockgating;
|
|
snps,en-lpi;
|
|
snps,write-requests = <2>;
|
|
snps,read-requests = <16>;
|
|
snps,burst-map = <0x7>;
|
|
snps,txpbl = <8>;
|
|
snps,rxpbl = <2>;
|
|
|
|
dma-coherent;
|
|
|
|
mdio {
|
|
#address-cells = <0x1>;
|
|
#size-cells = <0x0>;
|
|
phy2: phy@1 {
|
|
compatible = "ethernet-phy-ieee802.3-c22";
|
|
device_type = "ethernet-phy";
|
|
reg = <0x1>;
|
|
};
|
|
};
|
|
};
|