netdev - Re: [PATCH] net: dsa: rtl8366rb: Support port 4 (WAN)

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Date:   Wed, 8 Aug 2018 14:57:38 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        netdev@...r.kernel.org, openwrt-devel@...ts.openwrt.org,
        LEDE Development List <lede-dev@...ts.infradead.org>
Subject: Re: [PATCH] net: dsa: rtl8366rb: Support port 4 (WAN)

On Wed, Aug 08, 2018 at 02:38:55PM +0200, Linus Walleij wrote:
> The totally undocumented IO mode needs to be set to enumerator
> 0 to enable port 4 also known as WAN in most configurations,
> for ordinary traffic. The 3 bits in the register come up as
> 010 after reset, but need to be set to 000.
> 
> The Realtek source code contains a name for these bits, but
> no explanation of what the 8 different IO modes may be.

Hi Linus

I'm guessing this is MII, RMII, GMII, RGMII etc.

If it is, using phy-mode would be good. But that can wait until we
actually know.
 
> Set it to zero for the time being and drop a comment so
> people know what is going on if they run into trouble. This
> "mode zero" works fine with the D-Link DIR-685 with
> RTL8366RB.
> 
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew