diff --git a/drivers/hwmon/asus_atk0110.c b/drivers/hwmon/asus_atk0110.c
index bff0103610c1..fe4fa29c9219 100644
--- a/drivers/hwmon/asus_atk0110.c
+++ b/drivers/hwmon/asus_atk0110.c
@@ -593,7 +593,11 @@ static int atk_add_sensor(struct atk_data *data, union acpi_object *obj)
 	sensor->data = data;
 	sensor->id = flags->integer.value;
 	sensor->limit1 = limit1->integer.value;
-	sensor->limit2 = limit2->integer.value;
+	if (data->old_interface)
+		sensor->limit2 = limit2->integer.value;
+	else
+		/* The upper limit is expressed as delta from lower limit */
+		sensor->limit2 = sensor->limit1 + limit2->integer.value;
 
 	snprintf(sensor->input_attr_name, ATTR_NAME_SIZE,
 			"%s%d_input", base_name, start + *num);
diff --git a/drivers/hwmon/smsc47m1.c b/drivers/hwmon/smsc47m1.c
index a92dbb97ee99..ba75bfcf14ce 100644
--- a/drivers/hwmon/smsc47m1.c
+++ b/drivers/hwmon/smsc47m1.c
@@ -86,6 +86,7 @@ superio_exit(void)
 #define SUPERIO_REG_ACT		0x30
 #define SUPERIO_REG_BASE	0x60
 #define SUPERIO_REG_DEVID	0x20
+#define SUPERIO_REG_DEVREV	0x21
 
 /* Logical device registers */
 
@@ -429,6 +430,9 @@ static int __init smsc47m1_find(unsigned short *addr,
 	 * The LPC47M292 (device id 0x6B) is somewhat compatible, but it
 	 * supports a 3rd fan, and the pin configuration registers are
 	 * unfortunately different.
+	 * The LPC47M233 has the same device id (0x6B) but is not compatible.
+	 * We check the high bit of the device revision register to
+	 * differentiate them.
 	 */
 	switch (val) {
 	case 0x51:
@@ -448,6 +452,13 @@ static int __init smsc47m1_find(unsigned short *addr,
 		sio_data->type = smsc47m1;
 		break;
 	case 0x6B:
+		if (superio_inb(SUPERIO_REG_DEVREV) & 0x80) {
+			pr_debug(DRVNAME ": "
+				 "Found SMSC LPC47M233, unsupported\n");
+			superio_exit();
+			return -ENODEV;
+		}
+
 		pr_info(DRVNAME ": Found SMSC LPC47M292\n");
 		sio_data->type = smsc47m2;
 		break;