linux-kernel - [PATCH net-next 1/3] net: ethernet: ave: Add suspend/resume support

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Message-Id: <1543478793-13719-2-git-send-email-hayashi.kunihiko@socionext.com>
Date:   Thu, 29 Nov 2018 17:06:31 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Subject: [PATCH net-next 1/3] net: ethernet: ave: Add suspend/resume support

This patch introduces suspend and resume functions to ave driver.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
---
 drivers/net/ethernet/socionext/sni_ave.c | 44 ++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/drivers/net/ethernet/socionext/sni_ave.c b/drivers/net/ethernet/socionext/sni_ave.c
index 6732f5c..64115b1 100644
--- a/drivers/net/ethernet/socionext/sni_ave.c
+++ b/drivers/net/ethernet/socionext/sni_ave.c
@@ -1734,6 +1734,49 @@ static int ave_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int ave_suspend(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ave_private *priv = netdev_priv(ndev);
+	int ret = 0;
+
+	if (netif_running(ndev)) {
+		ret = ave_stop(ndev);
+		netif_device_detach(ndev);
+	}
+
+	return ret;
+}
+
+static int ave_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct ave_private *priv = netdev_priv(ndev);
+	int ret = 0;
+
+	ave_global_reset(ndev);
+
+	if (ndev->phydev) {
+		ret = phy_resume(ndev->phydev);
+		if (ret)
+			return ret;
+	}
+
+	if (netif_running(ndev)) {
+		ret = ave_open(ndev);
+		netif_device_attach(ndev);
+	}
+
+	return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(ave_pm_ops, ave_suspend, ave_resume);
+#define AVE_PM_OPS	(&ave_pm_ops)
+#else
+#define AVE_PM_OPS	NULL
+#endif
+
 static int ave_pro4_get_pinmode(struct ave_private *priv,
 				phy_interface_t phy_mode, u32 arg)
 {
@@ -1908,6 +1951,7 @@ static struct platform_driver ave_driver = {
 	.remove = ave_remove,
 	.driver	= {
 		.name = "ave",
+		.pm   = AVE_PM_OPS,
 		.of_match_table	= of_ave_match,
 	},
 };
-- 
2.7.4