[linux-sunxi] Re: [PATCH] ARM: dts: sun7i: pcduino3-nano: enable RGMII RX/TX delay on PHY

Chen-Yu Tsai wens at kernel.org
Sun Nov 22 23:42:54 EST 2020


On Mon, Oct 26, 2020 at 12:34 AM Andrew Lunn <andrew at lunn.ch> wrote:
>
> On Sun, Oct 25, 2020 at 02:01:44PM +0000, Adam Sampson wrote:
> > The RX/TX delays for the Ethernet PHY on the Linksprite pcDuino 3 Nano
> > are configured in hardware, using resistors that are populated to pull
> > the RTL8211E's RXDLY/TXDLY pins low or high as needed.
> >
> > phy-mode should be set to rgmii-id to reflect this. Previously it was
> > set to rgmii, which used to work but now results in the delays being
> > disabled again as a result of the bugfix in commit bbc4d71d6354 ("net:
> > phy: realtek: fix rtl8211e rx/tx delay config").
> >
> > Tested on two pcDuino 3 Nano boards purchased in 2015. Without this fix,
> > Ethernet works unreliably on one board and doesn't work at all on the
> > other.
> >
> > Fixes: 061035d456c9 ("ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board")
> > Signed-off-by: Adam Sampson <ats at offog.org>
>
> Reviewed-by: Andrew Lunn <andrew at lunn.ch>

Looks like none of the maintainers were listed in the recipients.

Acked-by: Chen-Yu Tsai <wens at csie.org>



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