linux-kernel - RE: [PATCH] net: phy: use generic clause 45 autonegotiation done

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Date:   Thu, 19 Jul 2018 12:47:18 +0000
From:   Camelia Alexandra Groza <camelia.groza@....com>
To:     Andrew Lunn <andrew@...n.ch>
CC:     "rmk+kernel@...linux.org.uk" <rmk+kernel@...linux.org.uk>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] net: phy: use generic clause 45 autonegotiation done

> -----Original Message-----
> From: Andrew Lunn [mailto:andrew@...n.ch]
> Sent: Wednesday, July 18, 2018 17:39
> To: Camelia Alexandra Groza <camelia.groza@....com>
> Cc: f.fainelli@...il.com; davem@...emloft.net; netdev@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH] net: phy: use generic clause 45 autonegotiation done
> 
> On Wed, Jul 18, 2018 at 04:12:15PM +0300, Camelia Groza wrote:
> > Only Clause 22 PHYs can use genphy_aneg_done(). Use
> > genphy_c45_aneg_done() for PHYs that implement Clause 45 without the
> > Clause 22 register set.
> >
> > This change follows the model of phy_restart_aneg() which
> > differentiates between the two implementations in a similar way.
> 
> Hi Camelia
> 
> What about phy_config_aneg()? I would assume any sort of auto-neg action
> needs to check for c45 without c22, before calling a genphy_ function. Do you
> think it is possible to write a genphy_c45_config_aneg()? If not, we might
> want to return -EOPNOTSUPP.

Hi Andrew,

Adding Russell to the thread as well, since he wrote the c45 helpers.

Sure, I'll send a v2 with an additional generic phy_config_aneg(). I'll stick to returning -EOPNOTSUPP for c22-less PHYs for now.

Thanks,
Camelia