linux-kernel - Re: [PATCH v2 net-next v2 12/12] net: dsa: mv88e6xxx: add addressing mode to info

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Date:	Tue, 14 Jun 2016 19:11:29 -0400
From:	Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:	Andrew Lunn <andrew@...n.ch>
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...oirfairelinux.com,
	"David S. Miller" <davem@...emloft.net>,
	Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH v2 net-next v2 12/12] net: dsa: mv88e6xxx: add addressing mode to info

Hi,

Andrew Lunn <andrew@...n.ch> writes:

> On Tue, Jun 14, 2016 at 06:24:17PM -0400, Vivien Didelot wrote:
>> Hi Andrew,
>> 
>> Andrew Lunn <andrew@...n.ch> writes:
>> 
>> >> -	ret = mdiobus_read_nested(bus, addr, reg);
>> >> +	ret = mdiobus_read_nested(bus, sw_addr + addr, reg);
>> >>  	if (ret < 0)
>> >>  		return ret;
>> >
>> > If we are doing direct access, doesn't it means sw_addr is 0?
>> >
>> > So isn't this pointless?
>> 
>> 6060 has no indirect access and directly responds to 16 SMI addresses,
>> regardless its chip address which can be strapped to either 0 or 16.
>
> Ah! O.K.
>
> wnr854t-setup.c uses 0.
> rd88f6183ap-ge-setup.c uses 0.
> wrt350n-v2-setup.c uses 0.
> rd88f5181l-fxo-setup.c uses 0.
> rd88f5181l-ge-setup.c uses 0.
> mach-bf518/boards/ezbrd.c uses 0.
>
> The 6060 is a very old device. I doubt we will get any new boards
> contributed using it. We are also going to have trouble actually
> finding a device with one in order to test a merged mv88e6xxx and
> mv88e6060 driver.
>
> So i say we ignore the possibility of an 6060 on 16, until one really
> comes along.

Sounds good to me!

Thanks,

        Vivien