Commit da970726 authored by Wei Fang's avatar Wei Fang Committed by David S. Miller
Browse files

net: fec: add pm runtime force suspend and resume support 



Force mii bus into runtime pm suspend state during device suspends,
since phydev state is already PHY_HALTED, and there is no need to
access mii bus during device suspend state. Then force mii bus into
runtime pm resume state when device resumes.

Signed-off-by: default avatarWei Fang <wei.fang@nxp.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8a26a9de

drivers/net/ethernet/freescale/fec.h

+1 −0
Original line number Diff line number Diff line
@@ -584,6 +584,7 @@ struct fec_enet_private { 
	struct device_node *phy_node;

	bool	rgmii_txc_dly;

	bool	rgmii_rxc_dly;

	bool	rpm_active;

	int	link;

	int	full_duplex;

	int	speed;

drivers/net/ethernet/freescale/fec_main.c

+13 −0
Original line number Diff line number Diff line
@@ -4135,6 +4135,7 @@ static int __maybe_unused fec_suspend(struct device *dev) 
{

	struct net_device *ndev = dev_get_drvdata(dev);

	struct fec_enet_private *fep = netdev_priv(ndev);

	int ret;



	rtnl_lock();

	if (netif_running(ndev)) {
@@ -4159,6 +4160,15 @@ static int __maybe_unused fec_suspend(struct device *dev) 
		}

		/* It's safe to disable clocks since interrupts are masked */

		fec_enet_clk_enable(ndev, false);



		fep->rpm_active = !pm_runtime_status_suspended(dev);

		if (fep->rpm_active) {

			ret = pm_runtime_force_suspend(dev);

			if (ret < 0) {

				rtnl_unlock();

				return ret;

			}

		}

	}

	rtnl_unlock();
@@ -4189,6 +4199,9 @@ static int __maybe_unused fec_resume(struct device *dev) 


	rtnl_lock();

	if (netif_running(ndev)) {

		if (fep->rpm_active)

			pm_runtime_force_resume(dev);



		ret = fec_enet_clk_enable(ndev, true);

		if (ret) {

			rtnl_unlock();