[PATCH] gmac: sun8i: r40: add gmac tx_delay support

[Jernej Škrabec]

Dne torek, 02. januar 2024 ob 16:58:07 CET je Jakub Kicinski napisal(a):
> On Thu, 21 Dec 2023 15:16:54 +0800 fuyao wrote:
> > I don't see it in the user manual also.
> > 
> > it works fine in 100M, but it doesn't work good in 1G without tx_delay
> > in my board.
> > 
> > Read the sdk from allwinner I found in:
> > 
> > https://sourcegraph.com/github.com/tinalinux/linux-3.10/-/blob/arch/arm/boot/dts/sun8iw11p1.dtsi?L1826
> > https://sourcegraph.com/github.com/tinalinux/linux-3.10@r40-v1.y/-/blob/drivers/net/ethernet/allwinner/sunxi-gmac.c?L877
> > 
> > And I add it to my board, it works fine.
> > 
> > So, I think it may be exist register but not documented.
> 
> Unless Allwinner can chime in we should at least document the situation
> clearly in the commit message (incl. what HW+config was tested, exactly)
> and add a comment in the code?
> 

I agree. Fuyao, please do that.

Best regards,
Jernej