usb: dwc3: omap: use runtime API's to enable clocks

Before accessing any register, runtime API's should be invoked to enable
the clocks. runtime API's are added here to prevent abort during register
access.

Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 78bb2f668f1fb13eef9620353a82b7eb9036cb4c..80942301893cee5619f143cb268c11b207af86d8 100644 (file)
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -43,6 +43,7 @@
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/dwc3-omap.h>
+#include <linux/pm_runtime.h>
 #include <linux/dma-mapping.h>
 #include <linux/ioport.h>
 #include <linux/io.h>
@@ -336,6 +337,13 @@ static int dwc3_omap_probe(struct platform_device *pdev)
        omap->irq       = irq;
        omap->base      = base;
 
+       pm_runtime_enable(dev);
+       ret = pm_runtime_get_sync(dev);
+       if (ret < 0) {
+               dev_err(dev, "get_sync failed with err %d\n", ret);
+               return ret;
+       }
+
        reg = dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_STATUS);
 
        utmi_mode = of_get_property(node, "utmi-mode", &size);
@@ -416,6 +424,8 @@ static int dwc3_omap_remove(struct platform_device *pdev)
 
        platform_device_unregister(omap->usb2_phy);
        platform_device_unregister(omap->usb3_phy);
+       pm_runtime_put_sync(&pdev->dev);
+       pm_runtime_disable(&pdev->dev);
        device_for_each_child(&pdev->dev, NULL, dwc3_omap_remove_core);
 
        return 0;