linux-kernel - Re: [PATCH v6 05/11] dt-bindings: net: dwmac-sun8i: update documentation about integrated PHY

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Date:   Thu, 28 Sep 2017 09:37:08 +0200
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     robh+dt@...nel.org, mark.rutland@....com,
        maxime.ripard@...e-electrons.com, wens@...e.org,
        linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, peppe.cavallaro@...com,
        alexandre.torgue@...com, f.fainelli@...il.com,
        frowand.list@...il.com, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH v6 05/11] dt-bindings: net: dwmac-sun8i: update
 documentation about integrated PHY

On Wed, Sep 27, 2017 at 04:02:10PM +0200, Andrew Lunn wrote:
> Hi Corentin
> 
> > +Required properties for the mdio-mux node:
> > +  - compatible = "mdio-mux"
> 
> This is too generic. Please add a more specific compatible for this
> particular mux. You can keep "mdio-mux", since that is what the MDIO
> subsystem will look for.
> 

I will add allwinner,sun8i-h3-mdio-mux

> > +Required properties of the integrated phy node:
> >  - clocks: a phandle to the reference clock for the EPHY
> >  - resets: a phandle to the reset control for the EPHY
> > +- phy-is-integrated
> 
> So the last thing you said is that the mux is not the problem
> here. Something else is locking up. Did you discover what?
> 
> I really would like phy-is-integrated to go away.
> 

I have found the problem: by enabling ephy clk/reset the timeout does not occur anymore.
So we could remove phy-is-integrated by:
Moving internal phy clk/reset handling in mdio_mux_syscon_switch_fn()
But this means:
- getting internalphy node always by manually get internal_mdio/internal_phy (and not by the given phyhandle)
- doing some unnecessary tasks (enable/scan/disable) when external_phy is needed

Regards