On Wed, Nov 25, 2015 at 07:14:13PM +0100, Michael Trimarchi wrote:

Hi Shawn

On Wed, Nov 18, 2015 at 4:10 PM, Michael Trimarchi
[off-list ref] wrote:

quoted

www.engicam.com/en/products/embedded/som/standard/i-core-rqs-m6s-dl-d-q

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
---
I'm not quite sure how ethernet tuning parameter
are working in other setup and this seems the
correct way to use it

As you can see my way to connect the ethernet phy is different. I have
seen that most of the boards put all the tuning under fec but unfortunately
this does not work. I don't know if people check if their value are correctly
written to the phy.

Hmm, I'm not sure what example you are looking at.  But here is what I
see from arch/arm/boot/dts/imx6qdl-sabrelite.dtsi

&fec {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_enet>;
        phy-mode = "rgmii";
        phy-reset-gpios = <&gpio3 23 GPIO_ACTIVE_LOW>;
        txen-skew-ps = <0>;
        txc-skew-ps = <3000>;
        rxdv-skew-ps = <0>;
        rxc-skew-ps = <3000>;
        rxd0-skew-ps = <0>;
        rxd1-skew-ps = <0>;
        rxd2-skew-ps = <0>;
        rxd3-skew-ps = <0>;
        txd0-skew-ps = <0>;
        txd1-skew-ps = <0>;
        txd2-skew-ps = <0>;
        txd3-skew-ps = <0>;
        interrupts-extended = <&gpio1 6 IRQ_TYPE_LEVEL_HIGH>,
                              <&intc 0 119 IRQ_TYPE_LEVEL_HIGH>;
        status = "okay";
};

Shawn

quoted

+
+&fec {
+       pinctrl-names = "default";
+       pinctrl-0 = <&pinctrl_enet_3>;
+       phy-handle = <&eth_phy>;
+       phy-mode = "rgmii";
+       status = "okay";
+       mdio {
+               eth_phy: ethernet-phy {
+                       rxc-skew-ps = <1140>;
+                       txc-skew-ps = <1140>;
+                       txen-skew-ps = <600>;
+                       rxdv-skew-ps = <240>;
+                       rxd0-skew-ps = <420>;
+                       rxd1-skew-ps = <600>;
+                       rxd2-skew-ps = <420>;
+                       rxd3-skew-ps = <240>;
+                       txd0-skew-ps = <60>;
+                       txd1-skew-ps = <60>;
+                       txd2-skew-ps = <60>;
+                       txd3-skew-ps = <240>;
+               };
+       };
+};
+