Merge branch 'pm-devfreq' into pm-for-linus

* pm-devfreq:
  PM/Devfreq: Add Exynos4-bus device DVFS driver for Exynos4210/4212/4412.
  PM / devfreq: separate error paths from successful path

drivers/devfreq/Kconfig

@@ -65,4 +65,17 @@ config DEVFREQ_GOV_USERSPACE
 
 comment "DEVFREQ Drivers"
 
+config ARM_EXYNOS4_BUS_DEVFREQ
+	bool "ARM Exynos4210/4212/4412 Memory Bus DEVFREQ Driver"
+	depends on CPU_EXYNOS4210 || CPU_EXYNOS4212 || CPU_EXYNOS4412
+	select ARCH_HAS_OPP
+	select DEVFREQ_GOV_SIMPLE_ONDEMAND
+	help
+	  This adds the DEVFREQ driver for Exynos4210 memory bus (vdd_int)
+	  and Exynos4212/4412 memory interface and bus (vdd_mif + vdd_int).
+	  It reads PPMU counters of memory controllers and adjusts
+	  the operating frequencies and voltages with OPP support.
+	  To operate with optimal voltages, ASV support is required
+	  (CONFIG_EXYNOS_ASV).
+
 endif # PM_DEVFREQ

drivers/devfreq/Makefile

@@ -3,3 +3,6 @@ obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)	+= governor_simpleondemand.o
 obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE)	+= governor_performance.o
 obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE)	+= governor_powersave.o
 obj-$(CONFIG_DEVFREQ_GOV_USERSPACE)	+= governor_userspace.o
+
+# DEVFREQ Drivers
+obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos4_bus.o

drivers/devfreq/devfreq.c

@@ -347,7 +347,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 		if (!IS_ERR(devfreq)) {
 			dev_err(dev, "%s: Unable to create devfreq for the device. It already has one.\n", __func__);
 			err = -EINVAL;
-			goto out;
+			goto err_out;
 		}
 	}
 
@@ -356,7 +356,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 		dev_err(dev, "%s: Unable to create devfreq for the device\n",
 			__func__);
 		err = -ENOMEM;
-		goto out;
+		goto err_out;
 	}
 
 	mutex_init(&devfreq->lock);
@@ -399,17 +399,16 @@ struct devfreq *devfreq_add_device(struct device *dev,
 				   devfreq->next_polling);
 	}
 	mutex_unlock(&devfreq_list_lock);
-	goto out;
+out:
+	return devfreq;
+
 err_init:
 	device_unregister(&devfreq->dev);
 err_dev:
 	mutex_unlock(&devfreq->lock);
 	kfree(devfreq);
-out:
-	if (err)
-		return ERR_PTR(err);
-	else
-		return devfreq;
+err_out:
+	return ERR_PTR(err);
 }
 
 /**