TI DaVinci EMAC: Add suspend/resume capability

Add suspend/resume capability to TI DaVinci EMAC driver.

Signed-off-by: Ranjith Lohithakshan <ranjithl@ti.com>
Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 27 insertions, 3 deletions

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index a876dce13b9e..f1b09c0992b4 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -2806,11 +2806,33 @@ static int __devexit davinci_emac_remove(struct platform_device *pdev)
         return 0;
 }
 
+static
+int davinci_emac_suspend(struct platform_device *pdev, pm_message_t state)
+{
+        struct net_device *dev = platform_get_drvdata(pdev);
+
+        if (netif_running(dev))
+                emac_dev_stop(dev);
+
+        clk_disable(emac_clk);
+
+        return 0;
+}
+
+static int davinci_emac_resume(struct platform_device *pdev)
+{
+        struct net_device *dev = platform_get_drvdata(pdev);
+
+        clk_enable(emac_clk);
+
+        if (netif_running(dev))
+                emac_dev_open(dev);
+
+        return 0;
+}
+
 /**
  * davinci_emac_driver: EMAC platform driver structure
- *
- * We implement only probe and remove functions - suspend/resume and
- * others not supported by this module
  */
 static struct platform_driver davinci_emac_driver = {
         .driver = {
@@ -2819,6 +2841,8 @@ static struct platform_driver davinci_emac_driver = {
         },
         .probe = davinci_emac_probe,
         .remove = __devexit_p(davinci_emac_remove),
+        .suspend = davinci_emac_suspend,
+        .resume = davinci_emac_resume,
 };
 
 /**