diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c
index 6c9ad92..2011567 100644
--- a/drivers/rtc/rtc-dev.c
+++ b/drivers/rtc/rtc-dev.c
@@ -141,13 +141,13 @@
 	/* try the driver's ioctl interface */
 	if (ops->ioctl) {
 		err = ops->ioctl(class_dev->dev, cmd, arg);
-		if (err != -EINVAL)
+		if (err != -ENOIOCTLCMD)
 			return err;
 	}
 
 	/* if the driver does not provide the ioctl interface
 	 * or if that particular ioctl was not implemented
-	 * (-EINVAL), we will try to emulate here.
+	 * (-ENOIOCTLCMD), we will try to emulate here.
 	 */
 
 	switch (cmd) {
@@ -233,7 +233,7 @@
 		break;
 
 	default:
-		err = -EINVAL;
+		err = -ENOTTY;
 		break;
 	}
 
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index 2bc8aad..a997529 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -247,7 +247,7 @@
 		rtc_freq = arg;
 		return 0;
 	}
-	return -EINVAL;
+	return -ENOIOCTLCMD;
 }
 
 static int sa1100_rtc_read_time(struct device *dev, struct rtc_time *tm)
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index e1f7e8e..e1fa5fe 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -71,7 +71,7 @@
 		return 0;
 
 	default:
-		return -EINVAL;
+		return -ENOIOCTLCMD;
 	}
 }
 
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 4d49fd5..277596c 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -270,7 +270,7 @@
 		epoch = arg;
 		break;
 	default:
-		return -EINVAL;
+		return -ENOIOCTLCMD;
 	}
 
 	return 0;