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

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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: Wei Fang <wei.fang@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Wei Fang 2022-09-06 16:39:23 +08:00 committed by David S. Miller
parent 8a26a9dee5
commit da970726ea
2 changed files with 14 additions and 0 deletions
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1
drivers/net/ethernet/freescale/fec.h
View File

@ -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;

13
drivers/net/ethernet/freescale/fec_main.c
View File

@ -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();