sh_eth: add more PM methods

Add sh_eth_{suspend|resume}() implementing {suspend|resume|freeze|thaw|poweroff|
restore}() PM methods to make it possible to restore from hibernation not only
in Linux  but also in e.g. U-Boot and  to have more determined state on resume/
restore.

Signed-off-by: Mikhail Ulyanov <mikhail.ulyanov@cogentembedded.com>
[Sergei: moved sh_eth_{suspend|resume}() before sh_eth_runtime_nop(), enclosed
them with #ifdef CONFIG_PM_SLEEP, reordered the local variables, got rid of
*goto* and label, reordered macro invocations, renamed, modified the changelog.]
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 96219de153e1509a2332ac218163dcadec6e19eb..fe0277a35507935d45359b6e8a0cc2ba4f0dae1f 100644 (file)
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2947,6 +2947,36 @@ static int sh_eth_drv_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+static int sh_eth_suspend(struct device *dev)
+{
+       struct net_device *ndev = dev_get_drvdata(dev);
+       int ret = 0;
+
+       if (netif_running(ndev)) {
+               netif_device_detach(ndev);
+               ret = sh_eth_close(ndev);
+       }
+
+       return ret;
+}
+
+static int sh_eth_resume(struct device *dev)
+{
+       struct net_device *ndev = dev_get_drvdata(dev);
+       int ret = 0;
+
+       if (netif_running(ndev)) {
+               ret = sh_eth_open(ndev);
+               if (ret < 0)
+                       return ret;
+               netif_device_attach(ndev);
+       }
+
+       return ret;
+}
+#endif
+
 static int sh_eth_runtime_nop(struct device *dev)
 {
        /* Runtime PM callback shared between ->runtime_suspend()
@@ -2960,6 +2990,7 @@ static int sh_eth_runtime_nop(struct device *dev)
 }
 
 static const struct dev_pm_ops sh_eth_dev_pm_ops = {
+       SET_SYSTEM_SLEEP_PM_OPS(sh_eth_suspend, sh_eth_resume)
        SET_RUNTIME_PM_OPS(sh_eth_runtime_nop, sh_eth_runtime_nop, NULL)
 };
 #define SH_ETH_PM_OPS (&sh_eth_dev_pm_ops)