netdev - Re: [net-next PATCH 3/3] net: phy: add support for PHY package MMD read/write

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Message-ID: <65638d68.050a0220.17be1.86fe@mx.google.com>
Date: Sun, 26 Nov 2023 19:24:37 +0100
From: Christian Marangi <ansuelsmth@...il.com>
To: Andrew Lunn <andrew@...n.ch>
Cc: Florian Fainelli <florian.fainelli@...adcom.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Vladimir Oltean <olteanv@...il.com>,
	David Epping <david.epping@...singlinkelectronics.com>,
	Harini Katakam <harini.katakam@....com>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [net-next PATCH 3/3] net: phy: add support for PHY package MMD
 read/write

On Sun, Nov 26, 2023 at 07:14:52PM +0100, Andrew Lunn wrote:
> On Sun, Nov 26, 2023 at 01:37:48AM +0100, Christian Marangi wrote:
> > Some PHY in PHY package may require to read/write MMD regs to correctly
> > configure the PHY package.
> > 
> > Add support for these additional required function in both lock and no
> > lock variant.
> 
> You are assuming the PHY only supports C45 over C22. But what about
> those PHYs which have native C45? And maybe don't have C22 at all?
> 
> You should refactor the code of __phy_read_mmd() into a helper and use
> it here.
>

Have to be honest here and chose the ""easy"" way. Was a little scared
by all the complexity with mmd with C45 and C22... The idea was to add
C22 support for now and if used by others extend the function. But I
guess with the generic approach we are taking it's better to handle it
now. Will update this in v2.

-- 
	Ansuel