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Date: Fri, 24 Apr 2020 13:04:15 +0300 From: Heikki Krogerus <heikki.krogerus@...ux.intel.com> To: Calvin Johnson <calvin.johnson@....nxp.com> Cc: linux.cj@...il.com, Jeremy Linton <jeremy.linton@....com>, Andrew Lunn <andrew@...n.ch>, Andy Shevchenko <andy.shevchenko@...il.com>, Florian Fainelli <f.fainelli@...il.com>, Russell King - ARM Linux admin <linux@...linux.org.uk>, Cristi Sovaiala <cristian.sovaiala@....com>, Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>, Ioana Ciornei <ioana.ciornei@....com>, Madalin Bucur <madalin.bucur@....nxp.com>, Laurentiu Tudor <laurentiu.tudor@....com>, linux-acpi@...r.kernel.org, Diana Madalina Craciun <diana.craciun@....com>, linux-arm-kernel@...ts.infradead.org, Pankaj Bansal <pankaj.bansal@....com>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org, Varun Sethi <V.Sethi@....com>, Marcin Wojtas <mw@...ihalf.com>, Makarand Pawagi <makarand.pawagi@....com>, "Rajesh V . Bikkina" <rajesh.bikkina@....com>, Andy Shevchenko <andriy.shevchenko@...ux.intel.com>, Dmitry Torokhov <dmitry.torokhov@...il.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "Rafael J. Wysocki" <rafael@...nel.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de> Subject: Re: [net-next PATCH v1 1/2] device property: Introduce fwnode_phy_find_device() On Fri, Apr 24, 2020 at 08:46:16AM +0530, Calvin Johnson wrote: > Define fwnode_phy_find_device() to iterate an mdiobus and find the > phy device of the provided phy fwnode. > > Signed-off-by: Calvin Johnson <calvin.johnson@....nxp.com> > --- > > drivers/base/property.c | 41 ++++++++++++++++++++++++++++++++++++++++ > include/linux/property.h | 5 +++++ > 2 files changed, 46 insertions(+) > > diff --git a/drivers/base/property.c b/drivers/base/property.c > index 5f35c0ccf5e0..7c0c14c800b7 100644 > --- a/drivers/base/property.c > +++ b/drivers/base/property.c > @@ -870,6 +870,47 @@ int device_get_phy_mode(struct device *dev) > } > EXPORT_SYMBOL_GPL(device_get_phy_mode); > > +/** > + * fwnode_phy_find_device - Give a phy fwnode to find the corresponding > + * phy_device on the mdiobus. > + * @phy_fwnode: Pointer to the phy's fwnode. > + * > + * If successful, returns a pointer to the phy_device with the embedded > + * struct device refcount incremented by one, or NULL on failure. > + */ > +struct phy_device *fwnode_phy_find_device(struct fwnode_handle *phy_fwnode) > +{ > + struct device *d; > + struct mdio_device *mdiodev; > + > + if (!phy_fwnode) > + return NULL; > + > + d = bus_find_device_by_fwnode(&mdio_bus_type, phy_fwnode); > + if (d) { > + mdiodev = to_mdio_device(d); > + if (mdiodev->flags & MDIO_DEVICE_FLAG_PHY) > + return to_phy_device(d); > + put_device(d); > + } > + > + return NULL; > +} > +EXPORT_SYMBOL(fwnode_phy_find_device); > + > +/** > + * device_phy_find_device - For the given device, get the phy_device > + * @dev: Pointer to the given device > + * > + * If successful, returns a pointer to the phy_device with the embedded > + * struct device refcount incremented by one, or NULL on failure. > + */ > +struct phy_device *device_phy_find_device(struct device *dev) > +{ > + return fwnode_phy_find_device(dev_fwnode(dev)); > +} > +EXPORT_SYMBOL_GPL(device_phy_find_device); Let's not put any more subsystem specific functions into property.c. thanks, -- heikki
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