Re: [PATCHv2 1/3] phy: core: Add devm_of_phy_get_by_index to phy-core

[Arun Ramamurthy]

On 15-04-15 02:59 AM, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Tuesday 14 April 2015 03:40 AM, Arun Ramamurthy wrote:
> > Some generic drivers, such as ehci, may use multiple phys and for such
> > drivers referencing phy(s) by name(s) does not make sense. Instead of
> > inventing new naming schemes and using custom code to iterate through
> > them,
> > such drivers are better of using nameless phy bindings and using this
> > newly
> > introduced API to iterate through them.
> >
> > Signed-off-by: Arun Ramamurthy <arun.ramamurthy@xxxxxxxxxxxx>
> > Reviewed-by: Ray Jui <rjui@xxxxxxxxxxxx>
> > Reviewed-by: Scott Branden <sbranden@xxxxxxxxxxxx>
> > ---
> >   drivers/phy/phy-core.c  | 32 ++++++++++++++++++++++++++++++++
> >   include/linux/phy/phy.h |  2 ++
> >   2 files changed, 34 insertions(+)
> >
> > diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c
> > index 3791838..964a84d 100644
> > --- a/drivers/phy/phy-core.c
> > +++ b/drivers/phy/phy-core.c
> > @@ -623,6 +623,38 @@ struct phy *devm_of_phy_get(struct device *dev,
> > struct device_node *np,
> >   EXPORT_SYMBOL_GPL(devm_of_phy_get);
> >
> >   /**
> > + * devm_of_phy_get_by_index() - lookup and obtain a reference to a
> > phy by index.
> > + * @dev: device that requests this phy
> > + * @np: node containing the phy
> > + * @index: index of the phy
> > + *
> > + * Gets the phy using _of_phy_get(), and associates a device with it
> > using
> > + * devres. On driver detach, release function is invoked on the
> > devres data,
> > + * then, devres data is freed.
> > + *
> > + */
> > +struct phy *devm_of_phy_get_by_index(struct device *dev, struct
> > device_node *np,
> > +                     int index)
> > +{
> > +    struct phy **ptr, *phy;
> > +
> > +    ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL);
> > +    if (!ptr)
> > +        return ERR_PTR(-ENOMEM);
> > +
> > +    phy = _of_phy_get(np, index);
> > +    if (!IS_ERR(phy)) {
> > +        *ptr = phy;
> > +        devres_add(dev, ptr);
> > +    } else {
> > +        devres_free(ptr);
> > +    }
> > +
> > +    return phy;
> > +}
> > +EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index);
> > +
> > +/**
> >    * phy_create() - create a new phy
> >    * @dev: device that is creating the new phy
> >    * @node: device node of the phy
> > diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
> > index a0197fa..ae2ffaf 100644
> > --- a/include/linux/phy/phy.h
> > +++ b/include/linux/phy/phy.h
> > @@ -133,6 +133,8 @@ struct phy *devm_phy_get(struct device *dev, const
> > char *string);
> >   struct phy *devm_phy_optional_get(struct device *dev, const char
> > *string);
> >   struct phy *devm_of_phy_get(struct device *dev, struct device_node *np,
> >                   const char *con_id);
> > +struct phy *devm_of_phy_get_by_index(struct device *dev, struct
> > device_node *np,
> > +                     int index);
>
> Add stubs for this function too. Also update the Documentation/phy.txt.
Kishon, I have added stubs for this function in my next patch set. 
However I am still unclear on whether I need to make GENERIC_PHY an 
invisible option or change my "select" to "depend" ? It seems like there 
was no consensus on this? Do you have any final thoughts before i send 
out the next patch set? Thanks

> Thanks
> Kishon
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/