linux-kernel - Re: [PATCH 7/8] phy: helpers for USB ULPI PHY registering

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Message-ID: <20150129143441.GD2570@kuha.fi.intel.com>
Date:	Thu, 29 Jan 2015 16:34:41 +0200
From:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
To:	Felipe Balbi <balbi@...com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Baolu Lu <baolu.lu@...ux.intel.com>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Kishon Vijay Abraham I <kishon@...com>
Subject: Re: [PATCH 7/8] phy: helpers for USB ULPI PHY registering

On Wed, Jan 28, 2015 at 11:03:55PM -0600, Felipe Balbi wrote:
> On Fri, Jan 23, 2015 at 05:12:57PM +0200, Heikki Krogerus wrote:
> > ULPI PHYs need to be bound to their controllers with a
> > lookup. This adds helpers that the ULPI drivers can use to
> > do both, the registration of the PHY and the lookup, at the
> > same time.
> > 
> > Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> > Cc: Kishon Vijay Abraham I <kishon@...com>
> > ---
> >  drivers/phy/ulpi_phy.h | 31 +++++++++++++++++++++++++++++++
> >  1 file changed, 31 insertions(+)
> >  create mode 100644 drivers/phy/ulpi_phy.h
> > 
> > diff --git a/drivers/phy/ulpi_phy.h b/drivers/phy/ulpi_phy.h
> > new file mode 100644
> > index 0000000..ac49fb6
> > --- /dev/null
> > +++ b/drivers/phy/ulpi_phy.h
> > @@ -0,0 +1,31 @@
> > +#include <linux/phy/phy.h>
> > +
> > +/**
> > + * Helper that registers PHY for a ULPI device and adds a lookup for binding it
> > + * and it's controller, which is always the parent.
> > + */
> > +static inline struct phy
> > +*ulpi_phy_create(struct ulpi *ulpi, struct phy_ops *ops)
> > +{
> > +	struct phy *phy;
> > +	int ret;
> > +
> > +	phy = phy_create(&ulpi->dev, NULL, ops);
> > +	if (IS_ERR(phy))
> > +		return phy;
> > +
> > +	ret = phy_create_lookup(phy, "usb2-phy", dev_name(ulpi->dev.parent));
> 
> I wonder if this would break DT-based boot where PHY phandle is
> available. Kishon ?

If there are of_node for the PHY, we will not use this binding at all.

Br,

-- 
heikki
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