netdev - [PATCH RFC net-next 6/7] net: stmmac: add helpers to indicate WoL enable status

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Message-Id: <E1ugQ33-006KDR-Nj@rmk-PC.armlinux.org.uk>
Date: Mon, 28 Jul 2025 16:45:57 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH RFC net-next 6/7] net: stmmac: add helpers to indicate WoL
 enable status

Add two helpers to abstract the WoL enable status at the PHY and MAC to
make the code easier to read.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac.h          | 10 ++++++++++
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c     | 11 +++++------
 drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c |  4 ++--
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
index e1df59a643e3..2ae7174ec4b8 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h
@@ -373,6 +373,16 @@ enum stmmac_state {
 	STMMAC_SERVICE_SCHED,
 };
 
+static inline bool stmmac_wol_enabled_mac(struct stmmac_priv *priv)
+{
+	return priv->plat->pmt && device_may_wakeup(priv->device);
+}
+
+static inline bool stmmac_wol_enabled_phy(struct stmmac_priv *priv)
+{
+	return !priv->plat->pmt && device_may_wakeup(priv->device);
+}
+
 int stmmac_mdio_unregister(struct net_device *ndev);
 int stmmac_mdio_register(struct net_device *ndev);
 int stmmac_mdio_reset(struct mii_bus *mii);
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 7d467b494685..f44f8b1b0efa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7857,7 +7857,7 @@ int stmmac_suspend(struct device *dev)
 		priv->plat->serdes_powerdown(ndev, priv->plat->bsp_priv);
 
 	/* Enable Power down mode by programming the PMT regs */
-	if (device_may_wakeup(priv->device) && priv->plat->pmt) {
+	if (stmmac_wol_enabled_mac(priv)) {
 		stmmac_pmt(priv, priv->hw, priv->wolopts);
 		priv->irq_wake = 1;
 	} else {
@@ -7868,11 +7868,10 @@ int stmmac_suspend(struct device *dev)
 	mutex_unlock(&priv->lock);
 
 	rtnl_lock();
-	if (device_may_wakeup(priv->device) && !priv->plat->pmt)
+	if (stmmac_wol_enabled_phy(priv))
 		phylink_speed_down(priv->phylink, false);
 
-	phylink_suspend(priv->phylink,
-			device_may_wakeup(priv->device) && priv->plat->pmt);
+	phylink_suspend(priv->phylink, stmmac_wol_enabled_mac(priv));
 	rtnl_unlock();
 
 	if (stmmac_fpe_supported(priv))
@@ -7939,7 +7938,7 @@ int stmmac_resume(struct device *dev)
 	 * this bit because it can generate problems while resuming
 	 * from another devices (e.g. serial console).
 	 */
-	if (device_may_wakeup(priv->device) && priv->plat->pmt) {
+	if (stmmac_wol_enabled_mac(priv)) {
 		mutex_lock(&priv->lock);
 		stmmac_pmt(priv, priv->hw, 0);
 		mutex_unlock(&priv->lock);
@@ -7992,7 +7991,7 @@ int stmmac_resume(struct device *dev)
 	 * workqueue thread, which will race with initialisation.
 	 */
 	phylink_resume(priv->phylink);
-	if (device_may_wakeup(priv->device) && !priv->plat->pmt)
+	if (stmmac_wol_enabled_phy(priv))
 		phylink_speed_up(priv->phylink);
 
 	rtnl_unlock();
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 38b1c04c92a2..19f370bb934c 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -954,7 +954,7 @@ static int __maybe_unused stmmac_pltfr_noirq_suspend(struct device *dev)
 	if (!netif_running(ndev))
 		return 0;
 
-	if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
+	if (!stmmac_wol_enabled_mac(priv)) {
 		/* Disable clock in case of PWM is off */
 		clk_disable_unprepare(priv->plat->clk_ptp_ref);
 
@@ -975,7 +975,7 @@ static int __maybe_unused stmmac_pltfr_noirq_resume(struct device *dev)
 	if (!netif_running(ndev))
 		return 0;
 
-	if (!device_may_wakeup(priv->device) || !priv->plat->pmt) {
+	if (!stmmac_wol_enabled_mac(priv)) {
 		/* enable the clk previously disabled */
 		ret = pm_runtime_force_resume(dev);
 		if (ret)
-- 
2.30.2