netdev - Re: [PATCH net-next] net: phy: marvell: mv88e6390 temperature sensor reading

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Date:   Wed, 10 Jan 2018 15:05:59 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Florian Fainelli <f.fainelli@...il.com>
Cc:     David Miller <davem@...emloft.net>, netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH net-next] net: phy: marvell: mv88e6390 temperature sensor
 reading

> > > +static int m88e6390_hwmon_probe(struct phy_device *phydev)
> > > +{
> > > +	return marvell_hwmon_probe(phydev, &m88e6390_hwmon_chip_info);
> > > +}
> > >  #else
> > >  static int m88e1121_hwmon_probe(struct phy_device *phydev)
> > >  {
> > > @@ -1794,6 +1927,11 @@ static int m88e1510_hwmon_probe(struct phy_device *phydev)
> > >  {
> > >  	return 0;
> > >  }
> > > +
> > > +static int m88e6390_hwmon_probe(struct phy_device *phydev)
> > > +{
> > > +	return 0;
> > > +}
> > 
> > Instead of having to define m88e6390_hwmon_probe() twice, I would just
> > make marvell_hwmon_probe() a stub when CONFIG_HWMON=n?
> 
> Yes, i could do that. But again, i'm just following the pattern from
> the other two sensors.

Humm, actually, no. It makes it more complex. If marvell_hwmon_probe()
is a stub, and we keep m88e6390_hwmon_probe() as the real
implementation, it means we need m88e6390_hwmon_chip_info, so we can
pass it. Either i need a stub version of m88e6390_hwmon_chip_info, or
i just build all the hwmon code even when CONFIG_HWMON is
disabled. The compiler might be able to figure out it is all unused
and throw it away, but i doubt it.

Having m88e6390_hwmon_probe() a stub is much simpler.

       Andrew