linux-kernel - Re: [net-next PATCH v3 4/5] net: phy: Introduce fwnode_get_phy

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Message-ID: <20200511145959.GA20671@lsv03152.swis.in-blr01.nxp.com>
Date:   Mon, 11 May 2020 20:29:59 +0530
From:   Calvin Johnson <calvin.johnson@....nxp.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     Jeremy Linton <jeremy.linton@....com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        linux.cj@...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>,
        Varun Sethi <V.Sethi@....com>,
        "Rajesh V . Bikkina" <rajesh.bikkina@....com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Diana Madalina Craciun <diana.craciun@....com>,
        netdev <netdev@...r.kernel.org>, Marcin Wojtas <mw@...ihalf.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Makarand Pawagi <makarand.pawagi@....com>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        Pankaj Bansal <pankaj.bansal@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>
Subject: Re: [net-next PATCH v3 4/5] net: phy: Introduce fwnode_get_phy_id()

On Mon, May 11, 2020 at 03:04:57PM +0200, Andrew Lunn wrote:
> > NXP's LX2160ARDB platform currently has the following MDIO-PHY connection.
> > 
> > MDIO-1 ==> one 40G PHY, two 1G PHYs(C45), two 10G PHYs(C22)
> > MDIO-2 ==> one 25G PHY
> 
> It has been suggested that ACPI only support a one to one
> mapping. Each MAC has one MDIO bus, with one PHY on it. KISS.
> 
> This clearly does not work for your hardware. So not only do we need
> to solve how PHY properties are described, we also need an equivalent
> of phy-handle, so a MAC can indicate which PHY it is connected to.
> 

Right. I had introduced fwnode_get_phy_node() to take care of phy-handle.

> So in effect, you seem to be heading towards a pretty full
> reproduction of the DT binding. Before you go too much further and
> waste too much of your time, you might want confirmation from the ACPI
> people this is not too advanced for what ACPI can do and they tell you
> to forget ACPI for this hardware and stick with DT.

I've copied the patchset to Rafael and acpi ML.
Waiting for their response.

Thanks
Calvin