netdev - [PATCH net-next v4 2/7] phy: add hwtstamp

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Message-ID: <20251120174540.273859-3-vadim.fedorenko@linux.dev>
Date: Thu, 20 Nov 2025 17:45:35 +0000
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	Russell King <linux@...linux.org.uk>,
	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>,
	Andrew Lunn <andrew@...n.ch>
Cc: 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,
	Vadim Fedorenko <vadim.fedorenko@...ux.dev>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: [PATCH net-next v4 2/7] phy: add hwtstamp_get callback to phy drivers

PHY devices had lack of hwtstamp_get callback even though most of them
are tracking configuration info. Introduce new call back to
mii_timestamper.

Reviewed-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
Reviewed-by: Kory Maincent <kory.maincent@...tlin.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
---
 drivers/net/phy/phy.c           | 3 +++
 include/linux/mii_timestamper.h | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 350bc23c1fdb..13dd1691886d 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -478,6 +478,9 @@ int __phy_hwtstamp_get(struct phy_device *phydev,
 	if (!phydev)
 		return -ENODEV;
 
+	if (phydev->mii_ts && phydev->mii_ts->hwtstamp_get)
+		return phydev->mii_ts->hwtstamp_get(phydev->mii_ts, config);
+
 	return -EOPNOTSUPP;
 }
 
diff --git a/include/linux/mii_timestamper.h b/include/linux/mii_timestamper.h
index 08863c0e9ea3..3102c425c8e0 100644
--- a/include/linux/mii_timestamper.h
+++ b/include/linux/mii_timestamper.h
@@ -29,6 +29,8 @@ struct phy_device;
  *
  * @hwtstamp_set: Handles SIOCSHWTSTAMP ioctl for hardware time stamping.
  *
+ * @hwtstamp_get: Handles SIOCGHWTSTAMP ioctl for hardware time stamping.
+ *
  * @link_state: Allows the device to respond to changes in the link
  *		state.  The caller invokes this function while holding
  *		the phy_device mutex.
@@ -55,6 +57,9 @@ struct mii_timestamper {
 			     struct kernel_hwtstamp_config *kernel_config,
 			     struct netlink_ext_ack *extack);
 
+	int  (*hwtstamp_get)(struct mii_timestamper *mii_ts,
+			     struct kernel_hwtstamp_config *kernel_config);
+
 	void (*link_state)(struct mii_timestamper *mii_ts,
 			   struct phy_device *phydev);
 
-- 
2.47.3