[Letux-kernel] jz4730 Ethernet - works now (unreliable and with some deficiencies)

[H. Nikolaus Schaller]

Hi David,

> Am 22.06.2021 um 21:44 schrieb David Boddie <david at boddie.org.uk>:
> 
> On Fri Mar 12 14:58:05 CET 2021, H. Nikolaus Schaller wrote:
> 
>> * where do we get the MAC address from?
>> 
>> 	- is there some EEPROM or NVRAM encoding the MAC address?
>> 	- the devices have a sticker with an individual MAC address printed on it
>> 	- but that may just be the WiFI MAC - in our good old l400-2.6 kernel
>> 	there was a hack to call get_ethernet_addr() - have to research what it
>> 	was doing
> 
> I know you already figured out how the kernel gets the MAC address and I
> guess you verified that it matches the sticker on the bottom of the case.

Yes it does - if U-Boot provides:

ethaddr=${ethaddr}

But - somehow the kernel parameters are not properly passed/merged.
So therefore I currently have some hack in my build script.

> 
> Based on photos I took of the inside of my Minibook, I think the WiFi MAC
> is written on a sticker on the motherboard.

I think there is some flash/nvram inside the WiFi module and processed by
the USB driver inside the module. It did magically work like with any WiFi
stick you would plug in.

BR,
Nikolaus