netdev - Re: [PATCH v3 3/3] net: dsa: mv88e632x: Add SERDES ops

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Date: Tue, 18 Jul 2023 08:24:47 +0000
From: "Sverdlin, Alexander" <alexander.sverdlin@...mens.com>
To: "linux@...linux.org.uk" <linux@...linux.org.uk>, "Haener, Michael"
	<michael.haener@...mens.com>
CC: "andrew@...n.ch" <andrew@...n.ch>, "olteanv@...il.com"
	<olteanv@...il.com>, "davem@...emloft.net" <davem@...emloft.net>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"f.fainelli@...il.com" <f.fainelli@...il.com>, "kuba@...nel.org"
	<kuba@...nel.org>, "edumazet@...gle.com" <edumazet@...gle.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>, "pabeni@...hat.com"
	<pabeni@...hat.com>
Subject: Re: [PATCH v3 3/3] net: dsa: mv88e632x: Add SERDES ops

Hello Russell,

On Tue, 2023-07-18 at 08:48 +0100, Russell King (Oracle) wrote:
> On Tue, Jul 18, 2023 at 08:47:23AM +0100, Russell King (Oracle) wrote:
> > On Tue, Jul 18, 2023 at 08:59:31AM +0200, M. Haener wrote:
> > > From: Michael Haener <michael.haener@...mens.com>
> > > 
> > > The 88e632x family has several SERDES 100/1000 blocks. By adding these
> > > operations, these functionalities can be used.
> > > 
> > > Signed-off-by: Michael Haener <michael.haener@...mens.com>
> > > ---
> > > Changelog:
> > > v3: rebased onto main branch
> > > v2: rebased onto Russell Kings series dsa/88e6xxx/phylink
> > 
> > I think you're missing something - you seem to be adding support to read
> > the statistics from these blocks, but you're not actually driving them
> > at all in terms of reading their status or configuring them.
> > 
> > You need to modify drivers/net/dsa/mv88e6xxx/pcs-6352.c for that.
> 
> ... and this is why you need to be able to test on recent kernels!

are you absolutely sure about it?

mv88e6352_serdes_get_stats() remained in serdes.c after your rework and
as I see it, your rework is about link status, but you didn't touch
registers and statistics.

-- 
Alexander Sverdlin
Siemens AG
www.siemens.com