linux-kernel - Re: [PATCH net-next v3 1/2] net: phy: marvell10g: implement suspend/resume callbacks

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Message-ID: <20190402095040.GB3354@kwain>
Date:   Tue, 2 Apr 2019 11:50:40 +0200
From:   Antoine Tenart <antoine.tenart@...tlin.com>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     Antoine Tenart <antoine.tenart@...tlin.com>, davem@...emloft.net,
        linux@...linux.org.uk, andrew@...n.ch, f.fainelli@...il.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        thomas.petazzoni@...tlin.com, maxime.chevallier@...tlin.com,
        gregory.clement@...tlin.com, miquel.raynal@...tlin.com,
        nadavh@...vell.com, stefanc@...vell.com, mw@...ihalf.com
Subject: Re: [PATCH net-next v3 1/2] net: phy: marvell10g: implement
 suspend/resume callbacks

Hi Heiner,

On Fri, Mar 29, 2019 at 10:32:02PM +0100, Heiner Kallweit wrote:
> On 26.03.2019 15:53, Antoine Tenart wrote:
> > This patch adds the suspend/resume callbacks for Marvell 10G PHYs. The
> > three PCS (base-t, base-r and 1000base-x) are set in low power (the PCS
> > are powered down) when the PHY isn't used.
> > 
> > Signed-off-by: Antoine Tenart <antoine.tenart@...tlin.com>
> > Reviewed-by: Andrew Lunn <andrew@...n.ch>
> > ---
> >  drivers/net/phy/marvell10g.c | 14 ++++++++++++++
> >  1 file changed, 14 insertions(+)
> > 
> > diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
> > index 100b401b1f4a..b56cd35182d5 100644
> > --- a/drivers/net/phy/marvell10g.c
> > +++ b/drivers/net/phy/marvell10g.c
> > @@ -226,11 +226,25 @@ static int mv3310_probe(struct phy_device *phydev)
> >  
> >  static int mv3310_suspend(struct phy_device *phydev)
> >  {
> > +	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_T + MDIO_CTRL1,
> > +		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
> > +	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_CTRL1,
> > +		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
> > +	phy_modify_mmd(phydev, MDIO_MMD_PCS, MV_PCS_1000BASEX + MDIO_CTRL1,
> > +		       MDIO_CTRL1_LPOWER, MDIO_CTRL1_LPOWER);
> > +
> When you re-submit this series, in addition to my previous comment:
> Instead of phy_modify_mmd() it would be clearer to use
> phy_set/clear_bits_mmd(). And checking the return value wouldn't hurt.

OK, will do.

Thanks!
Antoine

-- 
Antoine Ténart, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com