linux-kernel - Re: [PATCH net-next v2 03/11] net: dsa: microchip: split ksz

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Message-ID: <20201112230254.v6bzsud3jlcmsjm2@skbuf>
Date:   Fri, 13 Nov 2020 01:02:54 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Christian Eggers <ceggers@...i.de>
Cc:     Jakub Kicinski <kuba@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Richard Cochran <richardcochran@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Kurt Kanzenbach <kurt.kanzenbach@...utronix.de>,
        George McCollister <george.mccollister@...il.com>,
        Marek Vasut <marex@...x.de>,
        Helmut Grohne <helmut.grohne@...enta.de>,
        Paul Barker <pbarker@...sulko.com>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>,
        Tristram Ha <Tristram.Ha@...rochip.com>,
        Woojung Huh <woojung.huh@...rochip.com>,
        Microchip Linux Driver Support <UNGLinuxDriver@...rochip.com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2 03/11] net: dsa: microchip: split ksz_common.h

On Thu, Nov 12, 2020 at 04:35:29PM +0100, Christian Eggers wrote:
> Parts of ksz_common.h (struct ksz_device) will be required in
> net/dsa/tag_ksz.c soon. So move the relevant parts into a new header
> file.
> 
> Signed-off-by: Christian Eggers <ceggers@...i.de>
> ---

I had to skip ahead to see what you're going to use struct ksz_port and
struct ksz_device for. It looks like you need:

	struct ksz_port::tstamp_rx_latency_ns
	struct ksz_device::ptp_clock_lock
	struct ksz_device::ptp_clock_time

Not more.

Why don't you go the other way around, i.e. exporting some functions
from your driver, and calling them from the tagger? You could even move
the entire ksz9477_tstamp_to_clock() into the driver as-is, as far as I
can see.