netdev - Re: [net-next 1/4] i40e: add support for PTP external synchronization clock

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Date:   Mon, 16 Nov 2020 17:53:25 -0800
From:   Richard Cochran <richardcochran@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     Tony Nguyen <anthony.l.nguyen@...el.com>, davem@...emloft.net,
        Piotr Kwapulinski <piotr.kwapulinski@...el.com>,
        netdev@...r.kernel.org, sassmann@...hat.com,
        Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
        Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
        Andrew Bowers <andrewx.bowers@...el.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: Re: [net-next 1/4] i40e: add support for PTP external
 synchronization clock

On Mon, Nov 16, 2020 at 05:07:37PM -0800, Jakub Kicinski wrote:
> On Fri, 13 Nov 2020 16:10:54 -0800 Tony Nguyen wrote:

> > +/* get PTP pins for ioctl */
> > +#define SIOCGPINS	(SIOCDEVPRIVATE + 0)
> > +/* set PTP pins for ioctl */
> > +#define SIOCSPINS	(SIOCDEVPRIVATE + 1)
> 
> This is unexpected.. is it really normal to declare private device
> IOCTLs to configure PPS pins? Or are you just exposing this so you're
> able to play with GPIOs from user space?

I missed the full patch, but I'd like to point out that we already
have a rather fully featured pin control API.  If something is missing
from that API, then please, let's discuss it!

Thanks,
Richard