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

[Andrew Lunn]

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>

    Andrew