netdev - Re: [wpan-next v2 06/27] net: mac802154: Set the symbol duration automatically

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Date:   Fri, 14 Jan 2022 11:18:58 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <alex.aring@...il.com>
Cc:     Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan - ML <linux-wpan@...r.kernel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "open list:NETWORKING [GENERAL]" <netdev@...r.kernel.org>,
        Michael Hennerich <michael.hennerich@...log.com>,
        Harry Morris <h.morris@...coda.com>,
        Varka Bhadram <varkabhadram@...il.com>,
        Xue Liu <liuxuenetmail@...il.com>, Alan Ott <alan@...nal11.us>,
        David Girault <david.girault@...vo.com>,
        Romuald Despres <romuald.despres@...vo.com>,
        Frederic Blain <frederic.blain@...vo.com>,
        Nicolas Schodet <nico@...fr.eu.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        "linux-wireless@...r.kernel.org Wireless" 
        <linux-wireless@...r.kernel.org>
Subject: Re: [wpan-next v2 06/27] net: mac802154: Set the symbol duration
 automatically

Hi Alexander,

alex.aring@...il.com wrote on Thu, 13 Jan 2022 18:36:15 -0500:

> Hi,
> 
> On Wed, 12 Jan 2022 at 12:33, Miquel Raynal <miquel.raynal@...tlin.com> wrote:
> ...
> > +               case IEEE802154_4030KHZ_MEAN_PRF:
> > +                       duration = 3974;
> > +                       break;
> > +               case IEEE802154_62890KHZ_MEAN_PRF:
> > +                       duration = 1018;
> > +                       break;
> > +               default:
> > +                       break;
> > +               }
> > +               break;
> > +       default:
> > +               break;
> > +       }
> > +
> > +set_duration:
> > +       if (!duration)
> > +               pr_debug("Unknown PHY symbol duration, the driver should be fixed\n");  
> 
> Why should the driver be fixed? It's more this table which needs to be fixed?

Right.

> 
> > +       else
> > +               phy->symbol_duration = duration;  
> 
> Can you also set the lifs/sifs period after the duration is known?

Done.

Thanks,
Miquèl