linux-kernel - Re: [PATCH v5 net-next 08/13] net: phy: marvell-88q2xxx: add support for temperature sensor

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Date: Thu, 1 Feb 2024 05:39:25 -0800
From: Guenter Roeck <linux@...ck-us.net>
To: Andrew Lunn <andrew@...n.ch>
Cc: Dimitri Fedrau <dima.fedrau@...il.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>, Jean Delvare <jdelvare@...e.com>,
 Stefan Eichenberger <eichest@...il.com>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org
Subject: Re: [PATCH v5 net-next 08/13] net: phy: marvell-88q2xxx: add support
 for temperature sensor

On 2/1/24 05:27, Andrew Lunn wrote:
>>> +#ifdef CONFIG_HWMON
>>
>> HWMON is tristate, so this may be problematic if the driver is built
>> into the kernel and hwmon is built as module.
> 
> There should be Kconfig in addition to this, e.g.
> 
> config MAXLINEAR_GPHY
>          tristate "Maxlinear Ethernet PHYs"
>          select POLYNOMIAL if HWMON
>          depends on HWMON || HWMON=n
>          help
>            Support for the Maxlinear GPY115, GPY211, GPY212, GPY215,
>            GPY241, GPY245 PHYs.
> 
> So its forced to being built in, or not built at all.
> 

Even then it should be "#if IS_ENABLED(HWMON)" in the code.

Thanks,
Guenter