netdev - [PATCH net-next] net: axiemac: add PM callbacks to support suspend/resume

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Date:   Tue,  1 Nov 2022 09:11:39 +0800
From:   Andy Chiu <andy.chiu@...ive.com>
To:     davem@...emloft.net, kuba@...nel.org, michal.simek@...inx.com,
        radhey.shyam.pandey@...inx.com
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        pabeni@...hat.com, edumazet@...gle.com, andy.chiu@...ive.com,
        greentime.hu@...ive.com
Subject: [PATCH net-next] net: axiemac: add PM callbacks to support suspend/resume

Support basic system-wide suspend and resume functions

Signed-off-by: Andy Chiu <andy.chiu@...ive.com>
---
 .../net/ethernet/xilinx/xilinx_axienet_main.c | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
index 441e1058104f..d082f2b10f4d 100644
--- a/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
+++ b/drivers/net/ethernet/xilinx/xilinx_axienet_main.c
@@ -2217,12 +2217,48 @@ static void axienet_shutdown(struct platform_device *pdev)
 	rtnl_unlock();
 }
 
+static int axienet_suspend(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+
+	if (!netif_running(ndev))
+		return 0;
+
+	netif_device_detach(ndev);
+
+	rtnl_lock();
+	axienet_stop(ndev);
+	rtnl_unlock();
+
+	return 0;
+}
+
+static int axienet_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+
+	if (!netif_running(ndev))
+		return 0;
+
+	rtnl_lock();
+	axienet_open(ndev);
+	rtnl_unlock();
+
+	netif_device_attach(ndev);
+
+	return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(axienet_pm_ops,
+				axienet_suspend, axienet_resume);
+
 static struct platform_driver axienet_driver = {
 	.probe = axienet_probe,
 	.remove = axienet_remove,
 	.shutdown = axienet_shutdown,
 	.driver = {
 		 .name = "xilinx_axienet",
+		 .pm = &axienet_pm_ops,
 		 .of_match_table = axienet_of_match,
 	},
 };
-- 
2.36.0