linux-kernel - Re: [net-next PATCH v2 04/14] net: phy: Introduce fwnode_get_phy

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Date:   Thu, 17 Dec 2020 13:58:04 +0530
From:   Calvin Johnson <calvin.johnson@....nxp.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Grant Likely <grant.likely@....com>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Jeremy Linton <jeremy.linton@....com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Russell King - ARM Linux admin <linux@...linux.org.uk>,
        Cristi Sovaiala <cristian.sovaiala@....com>,
        Florin Laurentiu Chiculita <florinlaurentiu.chiculita@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        Madalin Bucur <madalin.bucur@....nxp.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Marcin Wojtas <mw@...ihalf.com>,
        Pieter Jansen Van Vuuren <pieter.jansenvv@...boosystems.io>,
        Jon <jon@...id-run.com>, "linux.cj" <linux.cj@...il.com>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        Diana Madalina Craciun <diana.craciun@....com>,
        ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm Mailing List <linux-arm-kernel@...ts.infradead.org>,
        netdev <netdev@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: Re: [net-next PATCH v2 04/14] net: phy: Introduce fwnode_get_phy_id()

On Tue, Dec 15, 2020 at 07:28:10PM +0200, Andy Shevchenko wrote:
> On Tue, Dec 15, 2020 at 6:44 PM Calvin Johnson
> <calvin.johnson@....nxp.com> wrote:
> >
> > Extract phy_id from compatible string. This will be used by
> > fwnode_mdiobus_register_phy() to create phy device using the
> > phy_id.
> 
> ...
> 
> > +       if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) == 2) {
> > +               *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
> > +               return 0;
> > +       }
> > +       return -EINVAL;
> 
> Perhaps traditional pattern, i.e.
>        if (sscanf(cp, "ethernet-phy-id%4x.%4x", &upper, &lower) != 2)
>                return -EINVAL;
> 
>        *phy_id = ((upper & 0xFFFF) << 16) | (lower & 0xFFFF);
>        return 0;
> 
> And perhaps GENMASK() ?

Sure. Will rewrite accordingly.

Thanks
Calvin