netdev - Re: [PATCH v2 0/7] Add PTP support for BCM53128 switch

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Date:   Tue, 9 Nov 2021 12:39:36 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Martin Kaistra <martin.kaistra@...utronix.de>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Richard Cochran <richardcochran@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 0/7] Add PTP support for BCM53128 switch

On Tue, Nov 09, 2021 at 10:50:02AM +0100, Martin Kaistra wrote:
> Ideally, for the B53=m case, I would have liked to include the PTP
> support in the b53_module itself, however I couldn't find a way to do
> that without renaming either the common source file or the module, which
> I didn't want to do.
> 
> Instead, b53_ptp will be allowed as a loadable module, but only if
> b53_common is also a module, otherwise it will be built-in.

Does this not work?

obj-$(CONFIG_B53)		+= b53_common.o

ifdef CONFIG_B53_PTP
b53_common-objs += b53_ptp.o
endif

(haven't tried though)