linux-kernel - [PATCH net-next v1 1/3] r816e: add a fake driver r816e for RTL8116af

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Message-ID: <20260127113425.1989-2-javen_xu@realsil.com.cn>
Date: Tue, 27 Jan 2026 19:34:23 +0800
From: javen <javen_xu@...lsil.com.cn>
To: <hkallweit1@...il.com>, <nic_swsd@...ltek.com>, <andrew+netdev@...n.ch>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <horms@...nel.org>
CC: <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Javen Xu
	<javen_xu@...lsil.com.cn>
Subject: [PATCH net-next v1 1/3] r816e: add a fake driver r816e for RTL8116af

From: Javen Xu <javen_xu@...lsil.com.cn>

The driver is for the #fun which DID is 0x816e. The kernel could set
correct power state for #fun through the driver when suspending.

Signed-off-by: Javen Xu <javen_xu@...lsil.com.cn>
---
 drivers/net/ethernet/realtek/r816e/r816e.c | 75 ++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 drivers/net/ethernet/realtek/r816e/r816e.c

diff --git a/drivers/net/ethernet/realtek/r816e/r816e.c b/drivers/net/ethernet/realtek/r816e/r816e.c
new file mode 100644
index 000000000000..71674019de2c
--- /dev/null
+++ b/drivers/net/ethernet/realtek/r816e/r816e.c
@@ -0,0 +1,75 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  r816e is the Linux device driver released for Realtek RTL8116AF nic
+ *  with PCI-Express interface, which is used for power management.
+ *
+ *  Copyright(c) 2026 Realtek Semiconductor Corp.
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+
+static struct pci_device_id rtl816e_pci_tbl[] = {
+	{ PCI_VDEVICE(REALTEK, 0x816e), },
+	{ 0, },
+};
+
+MODULE_DEVICE_TABLE(pci, rtl816e_pci_tbl);
+
+static int rtl816e_probe(struct pci_dev *pdev,
+			 const struct pci_device_id *ent)
+{
+	int rc;
+
+	/* enable device (incl. PCI PM wakeup and hotplug setup) */
+	rc = pcim_enable_device(pdev);
+	if (rc < 0)
+		return dev_err_probe(&pdev->dev, rc, "enable failure\n");
+
+	dev_info(&pdev->dev, "enable device\n");
+
+	return rc;
+}
+
+static void rtl816e_remove(struct pci_dev *pdev) {}
+
+static int rtl816e_pm_suspend(struct device *device)
+{
+	return 0;
+}
+
+static int rtl816e_pm_resume(struct device *device)
+{
+	return 0;
+}
+
+static const struct dev_pm_ops rtl816e_pm_ops = {
+	SYSTEM_SLEEP_PM_OPS(rtl816e_pm_suspend, rtl816e_pm_resume)
+};
+
+static struct pci_driver rtl816e_pci_driver = {
+	.name		= "r816e",
+	.id_table	= rtl816e_pci_tbl,
+	.probe		= rtl816e_probe,
+	.remove		= rtl816e_remove,
+#ifdef CONFIG_PM
+	.driver.pm  = pm_ptr(&rtl816e_pm_ops),
+#endif
+};
+
+static int __init rtl816e_init_module(void)
+{
+	return pci_register_driver(&rtl816e_pci_driver);
+}
+
+static void __exit rtl816e_cleanup_module(void)
+{
+	pci_unregister_driver(&rtl816e_pci_driver);
+}
+
+module_init(rtl816e_init_module);
+module_exit(rtl816e_cleanup_module);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("RealTek RTL816E driver");
-- 
2.43.0