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Message-ID: <YrGXEReoc3qweU1S@shell.armlinux.org.uk>
Date: Tue, 21 Jun 2022 11:01:53 +0100
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Marcin Wojtas <mw@...ihalf.com>
Cc: Andrew Lunn <andrew@...n.ch>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
netdev <netdev@...r.kernel.org>,
"Rafael J. Wysocki" <rafael@...nel.org>,
Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
Len Brown <lenb@...nel.org>, vivien.didelot@...il.com,
Florian Fainelli <f.fainelli@...il.com>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, pabeni@...hat.com,
Heiner Kallweit <hkallweit1@...il.com>,
Grzegorz Bernacki <gjb@...ihalf.com>,
Grzegorz Jaszczyk <jaz@...ihalf.com>,
Tomasz Nowicki <tn@...ihalf.com>,
Samer El-Haj-Mahmoud <Samer.El-Haj-Mahmoud@....com>,
upstream@...ihalf.com
Subject: Re: [net-next: PATCH 01/12] net: phy: fixed_phy: switch to fwnode_
API
On Tue, Jun 21, 2022 at 11:56:06AM +0200, Marcin Wojtas wrote:
> pon., 20 cze 2022 o 19:59 Andrew Lunn <andrew@...n.ch> napisaĆ(a):
> >
> > On Mon, Jun 20, 2022 at 05:02:14PM +0200, Marcin Wojtas wrote:
> > > This patch allows to use fixed_phy driver and its helper
> > > functions without Device Tree dependency, by swtiching from
> > > of_ to fwnode_ API.
> >
> > Do you actually need this? phylink does not use this code, it has its
> > own fixed link implementation. And that implementation is not limited
> > to 1G.
> >
>
> Yes, phylink has its own fixed-link handling, however the
> net/dsa/port.c relies on fixed_phy helpers these are not 1:1
> equivalents. I assumed this migration (fixed_phy -> phylink) is not
> straightforward and IMO should be handled separately. Do you recall
> justification for not using phylink in this part of net/dsa/*?
All modern DSA drivers use phylink and not fixed-phy as far as I'm
aware - there are a number that still implement the .adjust_link
callback, but note in dsa_port_link_register_of():
if (!ds->ops->adjust_link) {
...
return 0;
}
dev_warn(ds->dev,
"Using legacy PHYLIB callbacks. Please migrate to PHYLINK!\n");
It's really just that they haven't been migrated.
--
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