netdev - [net-next 3/4] net: ethernet: renesas: rcar_gen4

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Message-ID: <20260201183745.1075399-4-niklas.soderlund+renesas@ragnatech.se>
Date: Sun,  1 Feb 2026 19:37:44 +0100
From: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
To: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Richard Cochran <richardcochran@...il.com>,
	netdev@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org
Cc: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
Subject: [net-next 3/4] net: ethernet: renesas: rcar_gen4_ptp: Add helper to read time

Instead of accessing the Gen4 PTP specific structure directly in drivers
add a helper to read the time. This is done in preparation to
completely hide the Gen4 PTP specific structure from users.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>
---
 drivers/net/ethernet/renesas/rcar_gen4_ptp.c | 10 ++++++++++
 drivers/net/ethernet/renesas/rcar_gen4_ptp.h |  2 ++
 drivers/net/ethernet/renesas/rtsn.c          |  9 +--------
 3 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/renesas/rcar_gen4_ptp.c b/drivers/net/ethernet/renesas/rcar_gen4_ptp.c
index 75bf7aac089b..a14a16cf5fe6 100644
--- a/drivers/net/ethernet/renesas/rcar_gen4_ptp.c
+++ b/drivers/net/ethernet/renesas/rcar_gen4_ptp.c
@@ -194,6 +194,16 @@ int rcar_gen4_ptp_clock_index(struct rcar_gen4_ptp_private *priv)
 }
 EXPORT_SYMBOL_GPL(rcar_gen4_ptp_clock_index);
 
+void rcar_gen4_ptp_gettime64(struct rcar_gen4_ptp_private *priv,
+			     struct timespec64 *ts)
+{
+	if (!priv->initialized)
+		return;
+
+	priv->info.gettime64(&priv->info, ts);
+}
+EXPORT_SYMBOL_GPL(rcar_gen4_ptp_gettime64);
+
 MODULE_AUTHOR("Yoshihiro Shimoda");
 MODULE_DESCRIPTION("Renesas R-Car Gen4 gPTP driver");
 MODULE_LICENSE("GPL");
diff --git a/drivers/net/ethernet/renesas/rcar_gen4_ptp.h b/drivers/net/ethernet/renesas/rcar_gen4_ptp.h
index c141cd38a40d..fffccda401f5 100644
--- a/drivers/net/ethernet/renesas/rcar_gen4_ptp.h
+++ b/drivers/net/ethernet/renesas/rcar_gen4_ptp.h
@@ -24,5 +24,7 @@ struct rcar_gen4_ptp_private *rcar_gen4_ptp_alloc(struct platform_device *pdev,
 						  void __iomem *addr);
 
 int rcar_gen4_ptp_clock_index(struct rcar_gen4_ptp_private *priv);
+void rcar_gen4_ptp_gettime64(struct rcar_gen4_ptp_private *priv,
+			     struct timespec64 *ts);
 
 #endif	/* #ifndef __RCAR_GEN4_PTP_H__ */
diff --git a/drivers/net/ethernet/renesas/rtsn.c b/drivers/net/ethernet/renesas/rtsn.c
index ce1047743970..85052b47afb9 100644
--- a/drivers/net/ethernet/renesas/rtsn.c
+++ b/drivers/net/ethernet/renesas/rtsn.c
@@ -104,13 +104,6 @@ static void rtsn_ctrl_data_irq(struct rtsn_private *priv, bool enable)
 	}
 }
 
-static void rtsn_get_timestamp(struct rtsn_private *priv, struct timespec64 *ts)
-{
-	struct rcar_gen4_ptp_private *ptp_priv = priv->ptp_priv;
-
-	ptp_priv->info.gettime64(&ptp_priv->info, ts);
-}
-
 static int rtsn_tx_free(struct net_device *ndev, bool free_txed_only)
 {
 	struct rtsn_private *priv = netdev_priv(ndev);
@@ -133,7 +126,7 @@ static int rtsn_tx_free(struct net_device *ndev, bool free_txed_only)
 				struct skb_shared_hwtstamps shhwtstamps;
 				struct timespec64 ts;
 
-				rtsn_get_timestamp(priv, &ts);
+				rcar_gen4_ptp_gettime64(priv->ptp_priv, &ts);
 				memset(&shhwtstamps, 0, sizeof(shhwtstamps));
 				shhwtstamps.hwtstamp = timespec64_to_ktime(ts);
 				skb_tstamp_tx(skb, &shhwtstamps);
-- 
2.52.0