linux-kernel - Re: [PATCH net-next v5] net: sfp: extend SMBus support

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Message-ID: <66e8424c-86c9-4ad7-a3a7-3c277bfa5432@lunn.ch>
Date: Sun, 18 Jan 2026 16:39:38 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Jonas Jelonek <jelonek.jonas@...il.com>
Cc: Maxime Chevallier <maxime.chevallier@...tlin.com>,
	Russell King <linux@...linux.org.uk>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S . Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bjørn Mork <bjorn@...k.no>
Subject: Re: [PATCH net-next v5] net: sfp: extend SMBus support

On Sun, Jan 18, 2026 at 10:43:12AM +0100, Jonas Jelonek wrote:
> Hi,
> 
> On 16.01.26 15:25, Andrew Lunn wrote:
> >> But let's first figure-out if word-only smbus are really a thing
> > Some grep foo on /drivers/i2c/busses might answer that.
> 
> Did that and haven't found any driver in mainline which is word-only.
> All drivers with word access capability have byte access too.

So for the moment, maybe add a WARN_ON() for an I2C bus that only
supports word access, and we can deal with it only if we ever get a
report of it firing.

   Andrew