Re: [net-next PATCH v5 13/15] phylink: introduce phylink_fwnode_phy_connect()

[Calvin Johnson]

On Mon, Feb 08, 2021 at 03:31:11PM +0000, Russell King - ARM Linux admin wrote:
> On Mon, Feb 08, 2021 at 08:42:42PM +0530, Calvin Johnson wrote:
> > +int phylink_fwnode_phy_connect(struct phylink *pl,
> > +			       struct fwnode_handle *fwnode,
> > +			       u32 flags)
> > +{
> > +	struct fwnode_handle *phy_fwnode;
> > +	struct phy_device *phy_dev;
> > +	int ret;
> > +
> > +	if (is_of_node(fwnode)) {
> > +		/* Fixed links and 802.3z are handled without needing a PHY */
> > +		if (pl->cfg_link_an_mode == MLO_AN_FIXED ||
> > +		    (pl->cfg_link_an_mode == MLO_AN_INBAND &&
> > +		     phy_interface_mode_is_8023z(pl->link_interface)))
> > +			return 0;
> 
> This difference between ACPI and DT really needs to be described in the
> commit description.
> 
> For example, why is it acceptable to have a PHY in fixed-link mode if
> we're using ACPI, and not DT?
> 
> If we look at the phylink code, accepting a PHY when in fixed-link mode
> is basically not supported... so why should ACPI allow this?

DT and ACPI should handle fixed-link in similar manner. I'll remove the OF
check.

Thanks
Calvin