linux-kernel - Re: [PATCH v5 00/20] net-next: stmmac: add dwmac-sun8i ethernet driver

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Date:   Mon, 1 May 2017 16:45:41 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Chen-Yu Tsai <wens@...e.org>
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        alexandre.torgue@...com, devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH v5 00/20] net-next: stmmac: add dwmac-sun8i ethernet
 driver

On Mon, May 01, 2017 at 10:28:46PM +0800, Chen-Yu Tsai wrote:
> On Mon, May 1, 2017 at 10:01 PM, Andrew Lunn <andrew@...n.ch> wrote:
> > On Mon, May 01, 2017 at 02:45:00PM +0200, Corentin Labbe wrote:
> >> Hello
> >>
> >> This patch series add the driver for dwmac-sun8i which handle the Ethernet MAC
> >> present on Allwinner H3/H5/A83T/A64 SoCs.
> >>
> >> This driver is the continuation of the sun8i-emac driver.
> >> During the development, it appeared that in fact the hardware was a modified
> >> version of some dwmac.
> >> So the driver is now written as a glue driver for stmmac.
> >>
> >> It supports 10/100/1000 Mbit/s speed with half/full duplex.
> >> It can use an internal PHY (MII 10/100) or an external PHY
> >> via RGMII/RMII.
> >
> > Hi Corentin
> >
> > Sorry if this has been asked before....
> >
> > Does the internal PHY have a phy driver? It seems like
> > tx-delay-ps/rx-delay-ps are properties of this internal PHY, and so
> > should be in the phy driver, if it has one.
> 
> Nope. These affect the delay lines for the external PHY interface.

Oh, yes. I understood the patch wrong.

None of the patches actually use these properties. Are they actually
needed? We should avoid adding vendor specific properties, if they are
not used.

    Andrew