Based on kernel version 4.16.1. Page generated on 2018-04-09 11:52 EST.
1 * Amlogic Meson DWMAC Ethernet controller 2 3 The device inherits all the properties of the dwmac/stmmac devices 4 described in the file stmmac.txt in the current directory with the 5 following changes. 6 7 Required properties on all platforms: 8 9 - compatible: Depending on the platform this should be one of: 10 - "amlogic,meson6-dwmac" 11 - "amlogic,meson8b-dwmac" 12 - "amlogic,meson-gxbb-dwmac" 13 Additionally "snps,dwmac" and any applicable more 14 detailed version number described in net/stmmac.txt 15 should be used. 16 17 - reg: The first register range should be the one of the DWMAC 18 controller. The second range is is for the Amlogic specific 19 configuration (for example the PRG_ETHERNET register range 20 on Meson8b and newer) 21 22 Required properties on Meson8b and newer: 23 - clock-names: Should contain the following: 24 - "stmmaceth" - see stmmac.txt 25 - "clkin0" - first parent clock of the internal mux 26 - "clkin1" - second parent clock of the internal mux 27 28 Optional properties on Meson8b and newer: 29 - amlogic,tx-delay-ns: The internal RGMII TX clock delay (provided 30 by this driver) in nanoseconds. Allowed values 31 are: 0ns, 2ns, 4ns, 6ns. 32 When phy-mode is set to "rgmii" then the TX 33 delay should be explicitly configured. When 34 not configured a fallback of 2ns is used. 35 When the phy-mode is set to either "rgmii-id" 36 or "rgmii-txid" the TX clock delay is already 37 provided by the PHY. In that case this 38 property should be set to 0ns (which disables 39 the TX clock delay in the MAC to prevent the 40 clock from going off because both PHY and MAC 41 are adding a delay). 42 Any configuration is ignored when the phy-mode 43 is set to "rmii". 44 45 Example for Meson6: 46 47 ethmac: ethernet@c9410000 { 48 compatible = "amlogic,meson6-dwmac", "snps,dwmac"; 49 reg = <0xc9410000 0x10000 50 0xc1108108 0x4>; 51 interrupts = <0 8 1>; 52 interrupt-names = "macirq"; 53 clocks = <&clk81>; 54 clock-names = "stmmaceth"; 55 } 56 57 Example for GXBB: 58 ethmac: ethernet@c9410000 { 59 compatible = "amlogic,meson-gxbb-dwmac", "snps,dwmac"; 60 reg = <0x0 0xc9410000 0x0 0x10000>, 61 <0x0 0xc8834540 0x0 0x8>; 62 interrupts = <0 8 1>; 63 interrupt-names = "macirq"; 64 clocks = <&clkc CLKID_ETH>, 65 <&clkc CLKID_FCLK_DIV2>, 66 <&clkc CLKID_MPLL2>; 67 clock-names = "stmmaceth", "clkin0", "clkin1"; 68 phy-mode = "rgmii"; 69 };