diff --git a/drivers/input/mouse/alps.c b/drivers/input/mouse/alps.c
index 262d1057c1da..341a6c3bf907 100644
--- a/drivers/input/mouse/alps.c
+++ b/drivers/input/mouse/alps.c
@@ -2467,14 +2467,14 @@ static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
 
 	if (IS_SS4PLUS_DEV(priv->dev_id)) {
 		num_x_electrode =
-			SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
+			SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
 		num_y_electrode =
-			SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
+			SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
 
 		priv->x_max =
-			(num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
+			(num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
 		priv->y_max =
-			(num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
+			(num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
 
 		x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
 		y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
@@ -2500,6 +2500,11 @@ static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
 	priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
 	priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
 
+	psmouse_err(psmouse,
+		    "test1 pitch %dx%d num-electrodes %dx%d physical size %dx%dmm res %dx%d max %dx%d\n",
+		    x_pitch, y_pitch, num_x_electrode, num_y_electrode,
+		    x_phys / 10, y_phys / 10, priv->x_res, priv->y_res, priv->x_max, priv->y_max);
+
 	return 0;
 }