linux-kernel - Re: [PATCH net-next 2/3] net: dsa: mv88e6xxx: extend PTP gettime function to read system clock

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Message-ID: <CAFfN3gUNrnjdOt8bW2EugzjSZMb_vvdEaLN0yOv_06=roqcJYQ@mail.gmail.com>
Date:   Mon, 19 Aug 2019 19:14:25 +0200
From:   Hubert Feurstein <h.feurstein@...il.com>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     netdev <netdev@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH net-next 2/3] net: dsa: mv88e6xxx: extend PTP gettime
 function to read system clock

Hi Andrew,

Am Mo., 19. Aug. 2019 um 15:27 Uhr schrieb Andrew Lunn <andrew@...n.ch>:
>
> > @@ -45,7 +45,8 @@ static int mv88e6xxx_smi_direct_write(struct mv88e6xxx_chip *chip,
> >  {
> >       int ret;
> >
> > -     ret = mdiobus_write_nested(chip->bus, dev, reg, data);
> > +     ret = mdiobus_write_sts_nested(chip->bus, dev, reg, data,
> > +                                    chip->ptp_sts);
> >       if (ret < 0)
> >               return ret;
> >
>
> Please also make a similar change to mv88e6xxx_smi_indirect_write().
> The last write in that function should be timestamped.
Since it is already the last write it should be already ok (The
mv88e6xxx_smi_indirect_write
calls the mv88e6xxx_smi_direct_write which initiates the timestamping).

Hubert