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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/net/dwmac-sun8i.txt | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/dwmac-sun8i.txt b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt new file mode 100644 index 000000000000..08e708c73193 --- /dev/null +++ b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt @@ -0,0 +1,78 @@ +* Allwinner sun8i GMAC ethernet controller + +This device is a platform glue layer for stmmac. +Please see stmmac.txt for the other unchanged properties. + +Required properties: +- compatible: should be one of the following string: + "allwinner,sun8i-a83t-emac" + "allwinner,sun8i-h3-emac" + "allwinner,sun50i-a64-emac" +- reg: address and length of the register for the device. +- interrupts: interrupt for the device +- interrupt-names: should be "macirq" +- clocks: A phandle to the reference clock for this device +- clock-names: should be "stmmaceth" +- resets: A phandle to the reset control for this device +- reset-names: should be "stmmaceth" +- phy-mode: See ethernet.txt +- phy-handle: See ethernet.txt +- #address-cells: shall be 1 +- #size-cells: shall be 0 +- syscon: A phandle to the syscon of the SoC with one of the following + compatible string: + - allwinner,sun8i-h3-system-controller + - allwinner,sun50i-a64-system-controller + - allwinner,sun8i-a83t-system-controller + +Optional properties: +- allwinner,tx-delay-ps: TX clock delay chain value in ps. Range value is 0-700. Default is 0) +- allwinner,rx-delay-ps: RX clock delay chain value in ps. Range value is 0-3100. Default is 0) +Both delay properties need to be a multiple of 100. They control the delay for +external PHY. + +Optional properties for "allwinner,sun8i-h3-emac": +- allwinner,leds-active-low: EPHY LEDs are active low + +Required child node of emac: +- mdio bus node: should be named mdio + +Required properties of the mdio node: +- #address-cells: shall be 1 +- #size-cells: shall be 0 + +The device node referenced by "phy" or "phy-handle" should be a child node +of the mdio node. See phy.txt for the generic PHY bindings. + +Required properties of the phy node with "allwinner,sun8i-h3-emac": +- clocks: a phandle to the reference clock for the EPHY +- resets: a phandle to the reset control for the EPHY + +Example: + +emac: ethernet@1c0b000 { + compatible = "allwinner,sun8i-h3-emac"; + syscon = <&syscon>; + reg = <0x01c0b000 0x104>; + interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>; + interrupt-names = "macirq"; + resets = <&ccu RST_BUS_EMAC>; + reset-names = "stmmaceth"; + clocks = <&ccu CLK_BUS_EMAC>; + clock-names = "stmmaceth"; + #address-cells = <1>; + #size-cells = <0>; + + phy-handle = <&int_mii_phy>; + phy-mode = "mii"; + allwinner,leds-active-low; + mdio: mdio { + #address-cells = <1>; + #size-cells = <0>; + int_mii_phy: ethernet-phy@1 { + reg = <1>; + clocks = <&ccu CLK_BUS_EPHY>; + resets = <&ccu RST_BUS_EPHY>; + }; + }; +}; |