netdev - Re: [PATCH net-next v5 3/5] net: phy: Kconfig: Add ptp library support and 1588 optional flag in Microchip phys

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Message-ID: <Z1B-s8-p1QC9SKGr@shell.armlinux.org.uk>
Date: Wed, 4 Dec 2024 16:09:23 +0000
From: "Russell King (Oracle)" <linux@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>
Cc: Divya.Koppera@...rochip.com, Arun.Ramadoss@...rochip.com,
	UNGLinuxDriver@...rochip.com, hkallweit1@...il.com,
	davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
	pabeni@...hat.com, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, richardcochran@...il.com,
	vadim.fedorenko@...ux.dev
Subject: Re: [PATCH net-next v5 3/5] net: phy: Kconfig: Add ptp library
 support and 1588 optional flag in Microchip phys

On Wed, Dec 04, 2024 at 05:02:46PM +0100, Andrew Lunn wrote:
> > > How many different PTP implementations does Microchip have?
> > > 
> > > I see mscc_ptp.c, lan743x_ptp.c, lan966x_ptp.c and sparx5_ptp.c. Plus this
> > > one.
> > > 
> > 
> > These are MAC specific PTP. The library that we implemented is for PHYs.
> 
> And the difference is? Marvell has one PTP implementation they use in
> the PHYs and MACs in Ethernet switches. The basic core is the same,
> with different wrappers around it.

... and I have code that implements a library for Marvell PTP, which is
dependent on the timestamping stuff getting sorted. I tested it
recently, and at least the user API wasn't working as intended in
mainline kernels.

When we actually get to a point where we can choose between the MAC and
the PHY timestamper, I'll go back to working on that library. Sadly,
that's not yet.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!