Re: [net-next PATCH v1 3/7] net: phy: Introduce fwnode_get_phy_id()

[Andrew Lunn]

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.

  Andrew