TDA2SX: how to configure the two emac slaves as fixed-link and autoeth respectively

Part Number: TDA2SX

Dear TI,

I am working with my TDA2SX custom board. The vision sdk version is 3.6. And the related uboot and kernel tags.

I have my emac0 port connected to on-board MCU without phy chip and emac1 port connected to a realtec phy chip to the outside.

This is my kernel dts snippet decompiled from my dtb file:

ethernet@48484000 {
			compatible = "ti,dra7-cpsw", "ti,cpsw";
			ti,hwmods = "gmac";
			clocks = <0x11b 0x11c>;
			clock-names = "fck", "cpts";
			cpdma_channels = <0x8>;
			ale_entries = <0x400>;
			bd_ram_size = <0x2000>;
			mac_control = <0x20>;
			slaves = <0x2>;
			active_slave = <0x0>;
			cpts_clock_mult = <0x784cfe14>;
			cpts_clock_shift = <0x1d>;
			reg = <0x48484000 0x1000 0x48485200 0x2e00>;
			#address-cells = <0x1>;
			#size-cells = <0x1>;
			ti,no-idle;
			interrupts = <0x0 0x14e 0x4 0x0 0x14f 0x4 0x0 0x150 0x4 0x0 0x151 0x4>;
			ranges;
			syscon = <0x8>;
			status = "okay";
			dual_emac;

			mdio@48485000 {
				compatible = "ti,cpsw-mdio";
				#address-cells = <0x1>;
				#size-cells = <0x0>;
				ti,hwmods = "davinci_mdio";
				bus_freq = <0xf4240>;
				reg = <0x48485000 0x100>;
				linux,phandle = <0x11d>;
				phandle = <0x11d>;
			};

			slave@48480200 {
				mac-address = [00 00 00 00 00 00];
				phy-mode = "rmii";
				dual_emac_res_vlan = <0x1>;

				fixed-link {
					speed = <0x64>;
					full-duplex;
				};
			};

			slave@48480300 {
				mac-address = [00 00 00 00 00 00];
				phy_id = <0x11d 0x1>;
				phy-mode = "mii";
				dual_emac_res_vlan = <0x2>;
			};

			cpsw-phy-sel@4a002554 {
				compatible = "ti,dra7xx-cpsw-phy-sel";
				reg = <0x4a002554 0x4>;
				reg-names = "gmii-sel";
			};

Then i can only get one eth port returned by issue ifconfig.

root@dra7xx-evm:~# ifconfig
eth0      Link encap:Ethernet  HWaddr A8:E2:C1:D9:29:2A
          inet6 addr: fe80::aae2:c1ff:fed9:292a%763612/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:17828 errors:0 dropped:0 overruns:0 frame:0
          TX packets:10 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1435901 (1.3 MiB)  TX bytes:1332 (1.3 KiB)
          Interrupt:92

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1%763612/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

As i have enabled the "dual_emac" property. Why can not i get both eth0 and eth1 ports, which just same as the evm board.
What should i do to make the eth1 interface working normally? Are there any files from the rootfs need to be checked?

Regardss
Liu Gan