netdev - Re: [net-next PATCH v2 0/3] Introduce new APIs to support phylink and phy layers

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Message-ID: <20200427143238.GA26436@lsv03152.swis.in-blr01.nxp.com>
Date:   Mon, 27 Apr 2020 20:02:38 +0530
From:   Calvin Johnson <calvin.johnson@....nxp.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
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>,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        Diana Madalina Craciun <diana.craciun@....com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        linux-acpi@...r.kernel.org, Marcin Wojtas <mw@...ihalf.com>,
        Makarand Pawagi <makarand.pawagi@....com>,
        "Rajesh V . Bikkina" <rajesh.bikkina@....com>,
        Varun Sethi <V.Sethi@....com>, linux-kernel@...r.kernel.org,
        Pankaj Bansal <pankaj.bansal@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [net-next PATCH v2 0/3] Introduce new APIs to support phylink
 and phy layers

On Mon, Apr 27, 2020 at 02:58:20PM +0100, Russell King - ARM Linux admin wrote:
> On Mon, Apr 27, 2020 at 06:54:06PM +0530, Calvin Johnson wrote:
> > Following functions are defined:
> >   phylink_fwnode_phy_connect()
> >   phylink_device_phy_connect()
> >   fwnode_phy_find_device()
> >   device_phy_find_device()
> >   fwnode_get_phy_node()
> > 
> > First two help in connecting phy to phylink instance.
> > Next two help in finding a phy on a mdiobus.
> > Last one helps in getting phy_node from a fwnode.
> > 
> > Changes in v2:
> >   move phy code from base/property.c to net/phy/phy_device.c
> >   replace acpi & of code to get phy-handle with fwnode_find_reference
> >   replace of_ and acpi_ code with generic fwnode to get phy-handle.
> > 
> > Calvin Johnson (3):
> >   device property: Introduce phy related fwnode functions
> >   net: phy: alphabetically sort header includes
> >   phylink: Introduce phylink_fwnode_phy_connect()
> 
> Thanks for this, but there's more work that needs to be done here.  I
> also think that we must have an ack from ACPI people before this can be
> accepted - you are in effect proposing a new way for representing PHYs
> in ACPI.

Thanks for your review.

Agree that we need an ack from ACPI people.
However, I don't think it is a completely new way as similar acpi approach to
get phy-handle is already in place.
Please see this:
https://elixir.bootlin.com/linux/v5.7-rc3/source/drivers/net/ethernet/apm/xgene/xgene_enet_hw.c#L832

Please let me know, if you see more work than the ones you pointed out in your
review comments on previous patches.

Thanks
Calvin