Add PM ops for Suspend to Idle. When the system suspended,
the Ethernet Serdes's clock will be stopped. So, this driver needs
to re-initialize the Ethernet Serdes by phy_init() in
renesas_eth_sw_resume(). Otherwise, timeout happened in phy_power_on().
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
drivers/net/ethernet/renesas/rswitch.c | 43 ++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/drivers/net/ethernet/renesas/rswitch.c b/drivers/net/ethernet/renesas/rswitch.c
index e5a41e7880d8..43a7795d6591 100644
--- a/drivers/net/ethernet/renesas/rswitch.c
+++ b/drivers/net/ethernet/renesas/rswitch.c
@@ -17,6 +17,7 @@
#include <linux/of_net.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
+#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
@@ -1315,6 +1316,7 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
if (!phydev)
goto out;
__set_bit(rdev->etha->phy_interface, phydev->host_interfaces);
+ phydev->mac_managed_pm = true;
phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
rdev->etha->phy_interface);
@@ -1995,11 +1997,52 @@ static void renesas_eth_sw_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
}
+static int renesas_eth_sw_suspend(struct device *dev)
+{
+ struct rswitch_private *priv = dev_get_drvdata(dev);
+ struct net_device *ndev;
+ unsigned int i;
+
+ rswitch_for_each_enabled_port(priv, i) {
+ ndev = priv->rdev[i]->ndev;
+ if (netif_running(ndev)) {
+ netif_device_detach(ndev);
+ rswitch_stop(ndev);
+ }
+ if (priv->rdev[i]->serdes->init_count)
+ phy_exit(priv->rdev[i]->serdes);
+ }
+
+ return 0;
+}
+
+static int renesas_eth_sw_resume(struct device *dev)
+{
+ struct rswitch_private *priv = dev_get_drvdata(dev);
+ struct net_device *ndev;
+ unsigned int i;
+
+ rswitch_for_each_enabled_port(priv, i) {
+ phy_init(priv->rdev[i]->serdes);
+ ndev = priv->rdev[i]->ndev;
+ if (netif_running(ndev)) {
+ rswitch_open(ndev);
+ netif_device_attach(ndev);
+ }
+ }
+
+ return 0;
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(renesas_eth_sw_pm_ops, renesas_eth_sw_suspend,
+ renesas_eth_sw_resume);
+
static struct platform_driver renesas_eth_sw_driver_platform = {
.probe = renesas_eth_sw_probe,
.remove_new = renesas_eth_sw_remove,
.driver = {
.name = "renesas_eth_sw",
+ .pm = pm_sleep_ptr(&renesas_eth_sw_pm_ops),
.of_match_table = renesas_eth_sw_of_table,
}
};
--
2.25.1
