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Message-ID: <20201001040016.GC9110@lsv03152.swis.in-blr01.nxp.com>
Date: Thu, 1 Oct 2020 09:30:16 +0530
From: Calvin Johnson <calvin.johnson@....nxp.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Russell King - ARM Linux admin <linux@...linux.org.uk>,
Grant Likely <grant.likely@....com>,
"Rafael J . Wysocki" <rafael@...nel.org>,
Jeremy Linton <jeremy.linton@....com>,
Andy Shevchenko <andy.shevchenko@...il.com>,
Florian Fainelli <f.fainelli@...il.com>,
Cristi Sovaiala <cristian.sovaiala@....com>,
Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
Ioana Ciornei <ioana.ciornei@....com>,
Madalin Bucur <madalin.bucur@....nxp.com>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
linux-kernel@...r.kernel.org, linux.cj@...il.com,
netdev@...r.kernel.org, linux-acpi@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Diana Madalina Craciun <diana.craciun@....com>,
Laurentiu Tudor <laurentiu.tudor@....com>,
"David S. Miller" <davem@...emloft.net>,
Heiner Kallweit <hkallweit1@...il.com>,
Jakub Kicinski <kuba@...nel.org>
Subject: Re: [net-next PATCH v1 3/7] net: phy: Introduce fwnode_get_phy_id()
On Wed, Sep 30, 2020 at 08:19:02PM +0200, Andrew Lunn wrote:
> On Wed, Sep 30, 2020 at 07:07:25PM +0100, Russell King - ARM Linux admin wrote:
> > On Wed, Sep 30, 2020 at 06:34:40PM +0200, Andrew Lunn wrote:
> > > > @@ -2866,7 +2888,15 @@ EXPORT_SYMBOL_GPL(device_phy_find_device);
> > > > */
> > > > struct fwnode_handle *fwnode_get_phy_node(struct fwnode_handle *fwnode)
> > > > {
> > > > - return fwnode_find_reference(fwnode, "phy-handle", 0);
> > > > + struct fwnode_handle *phy_node;
> > > > +
> > > > + phy_node = fwnode_find_reference(fwnode, "phy-handle", 0);
> > > > + if (is_acpi_node(fwnode) || !IS_ERR(phy_node))
> > > > + return phy_node;
> > > > + phy_node = fwnode_find_reference(fwnode, "phy", 0);
> > > > + if (IS_ERR(phy_node))
> > > > + phy_node = fwnode_find_reference(fwnode, "phy-device", 0);
> > > > + return phy_node;
> > >
> > > Why do you have three different ways to reference a PHY?
> >
> > Compatibility with the DT version - note that "phy" and "phy-device"
> > are only used for non-ACPI fwnodes. This should allow us to convert
> > drivers where necessary without fear of causing DT regressions.
>
> Ah.
>
> A comment would be good here.
Sure. Will add comment.
Thanks
Calvin
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