RK3288 board which has RTL8211E ethernet chip and ACT8846 PMU controller. The dts file has following info, and it includes rk3288.dtsi ---------------------------------------------------------------------------- &gmac { assigned-clocks = <&cru SCLK_MAC>; assigned-clock-parents = <&ext_gmac>; clock_in_out = "input"; pinctrl-names = "default"; pinctrl-0 = <&rgmii_pins>, <&phy_rst>, <&phy_pmeb>, <&phy_int>; phy-supply = <&vcc_lan>; phy-mode = "rgmii"; snps,reset-active-low; snps,reset-delays-us = <0 10000 100000>; snps,reset-gpio = <&gpio4 RK_PB0 GPIO_ACTIVE_LOW>; tx_delay = <0x30>; rx_delay = <0x10>; status = "okay"; }; ---------------------------------------------------------------------------- The ethernet never comes up and giving below error. root@LXCNAME:~# dmesg | grep eth [ 2.519105] rk_gmac-dwmac ff290000.ethernet: IRQ eth_lpi not found [ 2.526163] rk_gmac-dwmac ff290000.ethernet: PTP uses main clock [ 2.532916] rk_gmac-dwmac ff290000.ethernet: phy regulator is not available yet, deferred probing [ 2.574228] usbcore: registered new interface driver cdc_ether [ 3.358577] rk_gmac-dwmac ff290000.ethernet: IRQ eth_lpi not found [ 3.358633] rk_gmac-dwmac ff290000.ethernet: PTP uses main clock [ 3.358851] rk_gmac-dwmac ff290000.ethernet: clock input or output? (input). [ 3.358857] rk_gmac-dwmac ff290000.ethernet: TX delay(0x30). [ 3.358861] rk_gmac-dwmac ff290000.ethernet: RX delay(0x10). [ 3.358868] rk_gmac-dwmac ff290000.ethernet: integrated PHY? (no). [ 3.358895] rk_gmac-dwmac ff290000.ethernet: cannot get clock clk_mac_speed [ 3.358898] rk_gmac-dwmac ff290000.ethernet: clock input from PHY [ 3.363906] rk_gmac-dwmac ff290000.ethernet: init for RGMII [ 3.364096] rk_gmac-dwmac ff290000.ethernet: User ID: 0x10, Synopsys ID: 0x35 [ 3.364104] rk_gmac-dwmac ff290000.ethernet: DWMAC1000 [ 3.364107] rk_gmac-dwmac ff290000.ethernet: DMA HW capability register supported [ 3.364111] rk_gmac-dwmac ff290000.ethernet: RX Checksum Offload Engine supported [ 3.364114] rk_gmac-dwmac ff290000.ethernet: COE Type 2 [ 3.364118] rk_gmac-dwmac ff290000.ethernet: TX Checksum insertion supported [ 3.364121] rk_gmac-dwmac ff290000.ethernet: Wake-Up On Lan supported [ 3.364157] rk_gmac-dwmac ff290000.ethernet: Normal descriptors [ 3.364160] rk_gmac-dwmac ff290000.ethernet: Ring mode enabled [ 3.364164] rk_gmac-dwmac ff290000.ethernet: Enable RX Mitigation via HW Watchdog Timer [ 8.156632] rk_gmac-dwmac ff290000.ethernet eth0: validation of rgmii with support 0000000,00000000,00006280 and advertisement 0000000,00000000,00006280 failed: -22 [ 8.157755] rk_gmac-dwmac ff290000.ethernet eth0: stmmac_open: Cannot attach to PHY (error: -22) root@LXCNAME:~# dmesg | grep sdmmac root@LXCNAME:~# dmesg | grep stmmac [ 3.466622] libphy: stmmac: probed [ 3.490765] mdio_bus stmmac-0:00: attached PHY driver [unbound] (mii_bus:phy_addr=stmmac-0:00, irq=POLL) [ 3.504573] mdio_bus stmmac-0:01: attached PHY driver [unbound] (mii_bus:phy_addr=stmmac-0:01, irq=POLL) [ 3.567118] mdio_bus stmmac-0:02: attached PHY driver [unbound] (mii_bus:phy_addr=stmmac-0:02, irq=POLL) [ 3.577736] mdio_bus stmmac-0