[PATCH] net: phy: realtek: Add tx/rx delay config for 8211e

Andre Przywara andre.przywara at arm.com
Thu Nov 4 14:40:42 CET 2021

On Thu, 4 Nov 2021 09:13:49 -0400
Tom Rini <trini at konsulko.com> wrote:

Hi Tom,

> On Tue, Oct 12, 2021 at 09:07:32PM -0500, Samuel Holland wrote:
> > Some boards need to change the tx/rx delay config in order for
> > gigabit Ethernet to work.
> > 
> > In Linux commit bbc4d71d6354 ("net: phy: realtek: fix rtl8211e rx/tx
> > delay config"), Realtek documented the bits for overriding the delays
> > from the hardware straps.
> > 
> > Copy the logic from linux, so the delay config is set from the PHY's
> > interface type (the phy-mode property in the device tree).
> > 
> > This removes the need for a one-off workaround for the Pine A64+ board.
> > 
> > Signed-off-by: Samuel Holland <samuel at sholland.org>
> > ---
> > This change is needed for the Allwinner D1 Nezha board, which has
> > incorrect hardware straps.  
> OK, so this breaks my pine64+.  It's the 1GB memory model from the
> original Kickstarter with an 8211e on it.  My dhcp just times out now,
> with this applied.  Let me know if there's some specifics you want me to
> try for debug or talk to me off-list and I can try and setup access to
> the board for you.

Many thanks for testing and the report. I will have a closer look tonight,
I should have quite some boards to be able to reproduce it.


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