Re: [PATCH v15 2/4] phy: Add media type and speed serdes configuration interfaces

[Steen Hegelund <steen.hegelund@microchip.com>]

Hi Leon,

On Sun, 2021-02-21 at 07:59 +0200, Leon Romanovsky wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you
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> 
> On Thu, Feb 18, 2021 at 05:14:49PM +0100, Steen Hegelund wrote:
> > Provide new phy configuration interfaces for media type and speed
> > that
> > allows e.g. PHYs used for ethernet to be configured with this
> > information.
> > 
> > Signed-off-by: Lars Povlsen <lars.povlsen@microchip.com>
> > Signed-off-by: Steen Hegelund <steen.hegelund@microchip.com>
> > Reviewed-by: Andrew Lunn <andrew@lunn.ch>
> > Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
> > ---
> > 

...

> >  int phy_validate(struct phy *phy, enum phy_mode mode, int submode,
> >                union phy_configure_opts *opts);
> > @@ -344,6 +356,20 @@ static inline int phy_set_mode_ext(struct phy
> > *phy, enum phy_mode mode,
> >  #define phy_set_mode(phy, mode) \
> >       phy_set_mode_ext(phy, mode, 0)
> > 
> > +static inline int phy_set_media(struct phy *phy, enum phy_media
> > media)
> > +{
> > +     if (!phy)
> > +             return 0;
> 
> I'm curious, why do you check for the NULL in all newly introduced
> functions?
> How is it possible that calls to phy_*() supply NULL as the main
> struct?
> 
> Thanks

I do not know the history of that, but all the functions in the
interface that takes a phy as input and returns a status follow that
pattern.  Maybe Kishon and Vinod knows the origin?

> 
> > +     return -ENODEV;
> > +}
> > +
> > +static inline int phy_set_speed(struct phy *phy, int speed)
> > +{
> > +     if (!phy)
> > +             return 0;
> > +     return -ENODEV;
> > +}
> > +
> >  static inline enum phy_mode phy_get_mode(struct phy *phy)
> >  {
> >       return PHY_MODE_INVALID;
> > --
> > 2.30.0
> > 

Best Regards
Steen