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Message-ID: <Y/zKJUHUhEgXjKFG@shell.armlinux.org.uk> Date: Mon, 27 Feb 2023 15:20:05 +0000 From: "Russell King (Oracle)" <linux@...linux.org.uk> To: Köry Maincent <kory.maincent@...tlin.com> Cc: andrew@...n.ch, davem@...emloft.net, f.fainelli@...il.com, hkallweit1@...il.com, kuba@...nel.org, netdev@...r.kernel.org, richardcochran@...il.com, Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Maxime Chevallier <maxime.chevallier@...tlin.com> Subject: Re: [PATCH RFC net-next] net: phy: add Marvell PHY PTP support [multicast/DSA issues] On Mon, Feb 27, 2023 at 03:40:37PM +0100, Köry Maincent wrote: > Hello RMK, > > > Hence why I'm at the point of giving up; I don't see that PTP will be > > of very limited benefit on my network with all these issues, and in > > any case, NTP has been "good enough" for the last 20+ years. Given > > that only a limited number of machines will be able to implement PTP > > support anyway, NTP will have to run along side it. > > I see this patch has been abandoned. > I am testing it with a ZynqMP board (macb ethernet) and it seems to more or > less work. It got tx timestamp timeout at initialization but after some times > (~20 seconds) ptp4l manages to set it working. Also the IEEE 802.3 > network PTP mode is not working, it constantly throw rx timestamp overrun > errors. > I will aim at fixing these issues and adding support to interrupts. It would be > good to have it accepted mainline. What do you think is missing for that? It isn't formally abandoned, but is permanently on-hold as merging Marvell PHY PTP support into mainline _will_ regress the superior PTP support on the Macchiatobin platform for the reasons outlined in: https://lore.kernel.org/netdev/20200729220748.GW1605@shell.armlinux.org.uk/ Attempting to fix this problem was basically rejected by the PTP maintainer, and thus we're at a deadlock over the issue, and Marvell PHY PTP support can never be merged into mainline. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!
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