MLK-9786 net: fec: Add busfreq support to the driver

Add request_bus_freq() and release_bus_freq() calls to the
various drivers to ensure that the DDR and AHB are the requested
frequency before the driver starts its task.

Signed-off-by: Fugang Duan <B38611@freescale.com>

drivers/net/ethernet/freescale/fec_main.c

@@ -2840,6 +2840,7 @@ fec_enet_open(struct net_device *ndev)
 	device_set_wakeup_enable(&ndev->dev, fep->wol_flag &
 				 FEC_WOL_FLAG_ENABLE);
 
+	pm_runtime_get_sync(ndev->dev.parent);
 	if ((id_entry->driver_data & FEC_QUIRK_BUG_WAITMODE) &&
 	    !fec_enet_irq_workaround(fep))
 		pm_qos_add_request(&fep->pm_qos_req,
@@ -2877,8 +2878,9 @@ fec_enet_close(struct net_device *ndev)
 	fep->phy_dev = NULL;
 
 	fec_enet_clk_enable(ndev, false);
-	pm_qos_remove_request(&ndev->pm_qos_req);
+	pm_qos_remove_request(&fep->pm_qos_req);
 	pinctrl_pm_select_sleep_state(&fep->pdev->dev);
+	pm_runtime_put_sync_suspend(ndev->dev.parent);
 	fec_enet_free_buffers(ndev);
 
 	return 0;
@@ -3392,6 +3394,7 @@ fec_probe(struct platform_device *pdev)
 		fep->bufdesc_ex = false;
 	}
 
+	pm_runtime_enable(&pdev->dev);
 	ret = fec_enet_clk_enable(ndev, true);
 	if (ret)
 		goto failed_clk;
@@ -3580,7 +3583,22 @@ static int __maybe_unused fec_resume(struct device *dev)
 	return ret;
 }
 
-static SIMPLE_DEV_PM_OPS(fec_pm_ops, fec_suspend, fec_resume);
+static int fec_runtime_suspend(struct device *dev)
+{
+	release_bus_freq(BUS_FREQ_HIGH);
+	return 0;
+}
+
+static int fec_runtime_resume(struct device *dev)
+{
+	request_bus_freq(BUS_FREQ_HIGH);
+	return 0;
+}
+
+static const struct dev_pm_ops fec_pm_ops = {
+	SET_RUNTIME_PM_OPS(fec_runtime_suspend, fec_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(fec_suspend, fec_resume)
+};
 
 static struct platform_driver fec_driver = {
 	.driver	= {