PROCESSOR-SDK-OMAPL138: Is RMII interface will work in MII interface

Hello Rejin,

It looks like the Ethernet interface can support either RMII or MII communication as per the datasheet. However, if you are using RMII signals to connect to an RMII PHY, then you should change your Linux devicetree to specify that the interface is RMII (NOT MII).

You should be able to refer to other Linux devicetree files in your SDK to get an idea of the differences in how to write your devicetree file.

Regards,

Nick

Hi Nick,

I tried the kernel building by modified the following this.

eth0: ethernet@220000 {
			compatible = "ti,davinci-dm6467-emac";
			reg = <0x220000 0x4000>;
			ti,davinci-ctrl-reg-offset = <0x3000>;
			ti,davinci-ctrl-mod-reg-offset = <0x2000>;
			ti,davinci-ctrl-ram-offset = <0>;
			ti,davinci-ctrl-ram-size = <0x2000>;
			ti,davinci-rmii-en = /bits/ 8 <1>;
			local-mac-address = [ 00 00 00 00 00 00 ];
			interrupts = <33
					34
					35
					36
					>;
			clocks = <&psc1 5>;
			power-domains = <&psc1 5>;
			status = "disabled";
		};

rmii_pins: pinmux_rmii_pins {
				pinctrl-single,bits = <
					/*
					 * RMII_TXD_1, RMII_TXD_0, RMII_TXEN
					 * RMII_RXD_1, RMII_RXN_0, RMII_RXER
					 */
					0x38 0x88888800 0xffffff00
					/*
					 * RMII_MHZ_50_CLK, RMII_CRS_DV
					 */
					0x3c 0x00000080 0x000000ff
				>;
			};

this is from da850.dtsi

&eth0 {
	pinctrl-names = "default";
	pinctrl-0 = <&rmii_pins>;
		 phy-mode = "rmii";
	status = "okay";
};

this is from da850-lcdk.dts

After all this changes, ping command not responding and returns 100% loss packet. But it is showing message "davinci_emac 1e20000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off" while plugging in the ethernet cable. 

One more thing Is there any interrupt line usage for ethernet interface?

Hello Rejin,

I will take a look at your post next week. Please ping the thread if you do not have a reply by the end of the week.

Regards,

Nick

Hi,

  Any idea from any one

Hi,

   how to close a thread. I accidently resolved this. Can you suggest a way to close this thread without resolve.

Hello Rejin,

No need to do anything on your end. It sounds like you did not mean to click the "This resolved my issue" button. I am not aware of a way to "undo" that button click, but that's ok. No further actions are needed on your side (for this specific thread).

Regards,

Nick