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@xxxxxx>
---
drivers/usb/dwc3/dwc3-omap.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index cb4037a..850a0cf 100644
--- 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>
@@ -272,6 +273,13 @@ static int __devinit 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);
@@ -348,6 +356,8 @@ static int __devinit dwc3_omap_probe(struct platform_device *pdev)
static int __devexit dwc3_omap_remove(struct platform_device *pdev)
{
+ pm_runtime_put_sync(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
device_for_each_child(&pdev->dev, NULL, dwc3_omap_remove_core);
return 0;
--
1.7.9.5
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