netdev - Re: [PATCH RFC] net: dsa: mv88e6xxx: fully support SERDES on Topaz family

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Message-ID: <20190826145327.GB16288@t480s.localdomain>
Date:   Mon, 26 Aug 2019 14:53:27 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     Marek Behun <marek.behun@....cz>
Cc:     netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: Re: [PATCH RFC] net: dsa: mv88e6xxx: fully support SERDES on Topaz
 family

On Mon, 26 Aug 2019 20:36:14 +0200, Marek Behun <marek.behun@....cz> wrote:
> > Ask yourself what is the single task achieved by this function, and name this
> > operation accordingly. It seems to change the CMODE to be writable, only
> > supported by certain switch models right? So in addition to port_get_cmode
> > and port_set_cmode, you can add port_set_cmode_writable, and call it right
> > before or after port_set_cmode in mv88e6xxx_port_setup_mac.
> 
> Andrew's complaint was also about this function being called every time
> cmode is to be changed. The cmode does need to be made writable only
> once. In this sense it does make sense to put into into
> mv88e6xxx_setup_port.

mv88e6xxx_port_setup_mac is called by mv88e6xxx_setup_port as expected and also
.phylink_mac_config. I don't think they are called that often and both deal
with configuration, so I'd prefer to keep this consistent and group the two
operations together in mv88e6xxx_port_setup_mac, if that's good for Andrew too.


Thanks,

	Vivien