usb: dwc3: omap: use runtime API's to enable clocks
authorKishon Vijay Abraham I <kishon@ti.com>
Fri, 25 Jan 2013 03:00:47 +0000 (08:30 +0530)
committerFelipe Balbi <balbi@ti.com>
Fri, 25 Jan 2013 07:15:54 +0000 (09:15 +0200)
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>
drivers/usb/dwc3/dwc3-omap.c

index 78bb2f668f1fb13eef9620353a82b7eb9036cb4c..80942301893cee5619f143cb268c11b207af86d8 100644 (file)
@@ -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;