Hi Anand,

On 01.11.2020 15:07, Anand Moon wrote:

Hi Lukasz,

On Thu, 1 Oct 2020 at 19:25, Łukasz Stelmach [off-list ref] wrote:

quoted

Add a placeholder for a MAC address. A bootloader may fill it
to set the MAC address and override EEPROM settings.

Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
Changes in v2:
  - use local-mac-address and leave mac-address to be added by a bootloader

  arch/arm/boot/dts/exynos5422-odroidxu3.dts | 18 ++++++++++++++++++
  1 file changed, 18 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3.dts b/arch/arm/boot/dts/exynos5422-odroidxu3.dts
index db0bc17a667b..d0f6ac5fa79d 100644
--- a/arch/arm/boot/dts/exynos5422-odroidxu3.dts
+++ b/arch/arm/boot/dts/exynos5422-odroidxu3.dts

@@ -70,3 +70,21 @@ &pwm {
  &usbdrd_dwc3_1 {
         dr_mode = "peripheral";
  };
+
+&usbhost2 {
+       #address-cells = <1>;
+       #size-cells = <0>;
+
+       hub@1 {
+               compatible = "usb8087,0024";
+               reg = <1>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               ethernet: usbether@1 {
+                       compatible = "usb0c45,6310";
+                       reg = <1>;
+                       local-mac-address = [00 00 00 00 00 00]; /* Filled in by a bootloader */
+               };
+       };
+};
--

2.26.2

Thanks for this patch, can you share some example on how to set the
mac address via u-boot bootargs

A little bit hacky script to set permanent board unique MAC address:

# setexp.b u0 *0x10000014; setexp.b u1 *0x10000015; setexp.b u2 
*0x10000016; setexp.b u3 *0x10000017; setenv ethaddr 
0:0:${u0}:${u1}:${u2}:${u3}; setenv usbethaddr ${ethaddr};

Then if there is proper ethernet0 alias set, u-boot will then 
automatically save the configured MAC address to the device tree. I've 
just check this on recent u-boot v2020.10 and Odroid U3 board.

Lukasz will send updated patch soon (with proper alias entry).

If you want to hack setting MAC address manually, this will work with 
the current patch:

# setexp.b u0 *0x10000014; setexp.b u1 *0x10000015; setexp.b u2 
*0x10000016; setexp.b u3 *0x10000017; fdt addr ${fdtaddr}; fdt set 
/soc/usb@12110000/hub@1/usbether@1 local-mac-address [ 0 0 ${u0} ${u1} 
${u2} ${u3} ]

also can you update this patch for exynos5422-odroidxu3-lite.dts and
exynos4412-odroidu3.dts.

Also odroid-x2 and odroid-xu. Lukasz will take care of them.

Best regards

-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland


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