diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
index f15cdb9..033317c 100644
--- a/arch/arm/common/edma.c
+++ b/arch/arm/common/edma.c
@@ -1809,6 +1809,7 @@ static int edma_pm_suspend(struct device *dev)

 	pm_runtime_put_sync(dev);

+	dev_err(dev, "%s\n", __func__);
 	return 0;
 }

@@ -1861,10 +1862,25 @@ static int edma_pm_resume(struct device *dev)

 	pm_runtime_put_sync(dev);

+	dev_err(dev, "%s\n", __func__);
 	return 0;
 }

+#if 1
 static SIMPLE_DEV_PM_OPS(edma_pm_ops, edma_pm_suspend, edma_pm_resume);
+#endif
+#if 0
+static const struct dev_pm_ops edma_pm_ops = {
+	.suspend_noirq = edma_pm_suspend,
+	.resume_noirq = edma_pm_resume,
+};
+#endif
+#if 0
+static const struct dev_pm_ops edma_pm_ops = {
+	.suspend_late = edma_pm_suspend,
+	.resume_early = edma_pm_resume,
+};
+#endif

 static struct platform_driver edma_driver = {
 	.driver = {
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index d4620a2..b917214 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -629,6 +629,7 @@ static int _od_suspend_noirq(struct device *dev)
 		}
 	}

+	dev_err(dev, "%s: suspended\n", __func__);
 	return ret;
 }

@@ -649,6 +650,7 @@ static int _od_resume_noirq(struct device *dev)
 		pm_generic_runtime_resume(dev);
 	}

+	dev_err(dev, "%s: resumed\n", __func__);
 	return pm_generic_resume_noirq(dev);
 }
 #else
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9f098a8..11d5f0f 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -518,6 +518,7 @@ static int device_resume_early(struct device *dev, pm_message_t state)
  Out:
 	TRACE_RESUME(error);

+	dev_err(dev, "%s enable\n", __func__);
 	pm_runtime_enable(dev);
 	return error;
 }
@@ -762,6 +763,7 @@ static void device_complete(struct device *dev, pm_message_t state)

 	device_unlock(dev);

+	dev_err(dev, "%s put\n", __func__);
 	pm_runtime_put(dev);
 }

@@ -934,6 +936,7 @@ static int device_suspend_late(struct device *dev, pm_message_t state)
 	pm_callback_t callback = NULL;
 	char *info = NULL;

+	dev_err(dev, "%s disable\n", __func__);
 	__pm_runtime_disable(dev, false);

 	if (dev->power.syscore)
@@ -1245,6 +1248,7 @@ static int device_prepare(struct device *dev, pm_message_t state)
 	 * block runtime suspend here, during the prepare phase, and allow
 	 * it again during the complete phase.
 	 */
+	dev_err(dev, "%s get\n", __func__);
 	pm_runtime_get_noresume(dev);

 	device_lock(dev);