net: phy: Add pm support to Broadcom iProc mdio mux driver

Add support for suspend and resume to the Broadcom iProc mdio
mux driver.

Signed-off-by: Arun Parameswaran <arun.parameswaran@broadcom.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/mdio-mux-bcm-iproc.c

@@ -286,6 +286,32 @@ static int mdio_mux_iproc_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int mdio_mux_iproc_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iproc_mdiomux_desc *md = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(md->core_clk);
+
+	return 0;
+}
+
+static int mdio_mux_iproc_resume(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct iproc_mdiomux_desc *md = platform_get_drvdata(pdev);
+
+	clk_prepare_enable(md->core_clk);
+	mdio_mux_iproc_config(md);
+
+	return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mdio_mux_iproc_pm_ops,
+			 mdio_mux_iproc_suspend, mdio_mux_iproc_resume);
+
 static const struct of_device_id mdio_mux_iproc_match[] = {
 	{
 		.compatible = "brcm,mdio-mux-iproc",
@@ -298,6 +324,7 @@ static struct platform_driver mdiomux_iproc_driver = {
 	.driver = {
 		.name		= "mdio-mux-iproc",
 		.of_match_table = mdio_mux_iproc_match,
+		.pm		= &mdio_mux_iproc_pm_ops,
 	},
 	.probe		= mdio_mux_iproc_probe,
 	.remove		= mdio_mux_iproc_remove,