netdev - [PATCH net-next 5/9] net: stmmac: loongson: convert to suspend()/resume() methods

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Message-Id: <E1ulXbs-008gqy-16@rmk-PC.armlinux.org.uk>
Date: Mon, 11 Aug 2025 19:51:04 +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>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-stm32@...md-mailman.stormreply.com,
	Matthias Brugger <matthias.bgg@...il.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH net-next 5/9] net: stmmac: loongson: convert to
 suspend()/resume() methods

Convert loongson to use the new suspend() and resume() methods rather
than implementing these in custom wrappers around the main driver's
suspend/resume methods. This allows this driver to use the stmmac
simple PM ops structure.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 .../ethernet/stmicro/stmmac/dwmac-loongson.c  | 73 +++++++++----------
 1 file changed, 34 insertions(+), 39 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
index e1591e6217d4..5769165ee5ba 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson.c
@@ -521,6 +521,37 @@ static int loongson_dwmac_fix_reset(void *priv, void __iomem *ioaddr)
 				  10000, 2000000);
 }
 
+static int loongson_dwmac_suspend(struct device *dev, void *bsp_priv)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	int ret;
+
+	ret = pci_save_state(pdev);
+	if (ret)
+		return ret;
+
+	pci_disable_device(pdev);
+	pci_wake_from_d3(pdev, true);
+	return 0;
+}
+
+static int loongson_dwmac_resume(struct device *dev, void *bsp_priv)
+{
+	struct pci_dev *pdev = to_pci_dev(dev);
+	int ret;
+
+	pci_restore_state(pdev);
+	pci_set_power_state(pdev, PCI_D0);
+
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
+
+	pci_set_master(pdev);
+
+	return 0;
+}
+
 static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	struct plat_stmmacenet_data *plat;
@@ -565,6 +596,8 @@ static int loongson_dwmac_probe(struct pci_dev *pdev, const struct pci_device_id
 	plat->bsp_priv = ld;
 	plat->setup = loongson_dwmac_setup;
 	plat->fix_soc_reset = loongson_dwmac_fix_reset;
+	plat->suspend = loongson_dwmac_suspend;
+	plat->resume = loongson_dwmac_resume;
 	ld->dev = &pdev->dev;
 	ld->loongson_id = readl(res.addr + GMAC_VERSION) & 0xff;
 
@@ -621,44 +654,6 @@ static void loongson_dwmac_remove(struct pci_dev *pdev)
 	pci_disable_device(pdev);
 }
 
-static int __maybe_unused loongson_dwmac_suspend(struct device *dev)
-{
-	struct pci_dev *pdev = to_pci_dev(dev);
-	int ret;
-
-	ret = stmmac_suspend(dev);
-	if (ret)
-		return ret;
-
-	ret = pci_save_state(pdev);
-	if (ret)
-		return ret;
-
-	pci_disable_device(pdev);
-	pci_wake_from_d3(pdev, true);
-	return 0;
-}
-
-static int __maybe_unused loongson_dwmac_resume(struct device *dev)
-{
-	struct pci_dev *pdev = to_pci_dev(dev);
-	int ret;
-
-	pci_restore_state(pdev);
-	pci_set_power_state(pdev, PCI_D0);
-
-	ret = pci_enable_device(pdev);
-	if (ret)
-		return ret;
-
-	pci_set_master(pdev);
-
-	return stmmac_resume(dev);
-}
-
-static SIMPLE_DEV_PM_OPS(loongson_dwmac_pm_ops, loongson_dwmac_suspend,
-			 loongson_dwmac_resume);
-
 static const struct pci_device_id loongson_dwmac_id_table[] = {
 	{ PCI_DEVICE_DATA(LOONGSON, GMAC1, &loongson_gmac_pci_info) },
 	{ PCI_DEVICE_DATA(LOONGSON, GMAC2, &loongson_gmac_pci_info) },
@@ -673,7 +668,7 @@ static struct pci_driver loongson_dwmac_driver = {
 	.probe = loongson_dwmac_probe,
 	.remove = loongson_dwmac_remove,
 	.driver = {
-		.pm = &loongson_dwmac_pm_ops,
+		.pm = &stmmac_simple_pm_ops,
 	},
 };
 
-- 
2.30.2