netdev - Re: [PATCH net-next v2 2/9] phy: add hwtstamp

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Message-ID: <a4b391f4-7acd-4109-a144-b128b2cc09b2@lunn.ch>
Date: Thu, 13 Nov 2025 14:36:10 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
Cc: "Russell King (Oracle)" <linux@...linux.org.uk>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Heiner Kallweit <hkallweit1@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Andrei Botila <andrei.botila@....nxp.com>,
	Richard Cochran <richardcochran@...il.com>,
	Simon Horman <horms@...nel.org>,
	Vladimir Oltean <vladimir.oltean@....com>,
	Jacob Keller <jacob.e.keller@...el.com>,
	Kory Maincent <kory.maincent@...tlin.com>,
	bcm-kernel-feedback-list@...adcom.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next v2 2/9] phy: add hwtstamp_get callback to phy
 drivers

> I was planning to remove SIOCSHWTSTAMP/SIOCGHWTSTAMP dev_eth_ioctl calls
> later once everything has landed and we have tests confirming that ioctl
> and netlink interfaces work exactly the same way.

I don't think you can remove SIOCSHWTSTAMP, it is ABI. All you can
really do is change the implementation so that it uses the same path
as the netlink code.

You can avoid this for _get by never adding it in the first
place. Only support the netlink API for PHYs.

	Andrew