net: ethernet: ti: cpsw_new: fix suspend/resume

Add missed suspend/resume callbacks to properly restore networking after
suspend/resume cycle.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 8ed7857..15672d0 100644 (file)
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -17,6 +17,7 @@
 #include <linux/phy.h>
 #include <linux/phy/phy.h>
 #include <linux/delay.h>
+#include <linux/pinctrl/consumer.h>
 #include <linux/pm_runtime.h>
 #include <linux/gpio/consumer.h>
 #include <linux/of.h>
@@ -2070,9 +2071,61 @@ static int cpsw_remove(struct platform_device *pdev)
        return 0;
 }
 
+static int __maybe_unused cpsw_suspend(struct device *dev)
+{
+       struct cpsw_common *cpsw = dev_get_drvdata(dev);
+       int i;
+
+       rtnl_lock();
+
+       for (i = 0; i < cpsw->data.slaves; i++) {
+               struct net_device *ndev = cpsw->slaves[i].ndev;
+
+               if (!(ndev && netif_running(ndev)))
+                       continue;
+
+               cpsw_ndo_stop(ndev);
+       }
+
+       rtnl_unlock();
+
+       /* Select sleep pin state */
+       pinctrl_pm_select_sleep_state(dev);
+
+       return 0;
+}
+
+static int __maybe_unused cpsw_resume(struct device *dev)
+{
+       struct cpsw_common *cpsw = dev_get_drvdata(dev);
+       int i;
+
+       /* Select default pin state */
+       pinctrl_pm_select_default_state(dev);
+
+       /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
+       rtnl_lock();
+
+       for (i = 0; i < cpsw->data.slaves; i++) {
+               struct net_device *ndev = cpsw->slaves[i].ndev;
+
+               if (!(ndev && netif_running(ndev)))
+                       continue;
+
+               cpsw_ndo_open(ndev);
+       }
+
+       rtnl_unlock();
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
+
 static struct platform_driver cpsw_driver = {
        .driver = {
                .name    = "cpsw-switch",
+               .pm      = &cpsw_pm_ops,
                .of_match_table = cpsw_of_mtable,
        },
        .probe = cpsw_probe,