Input: elan_i2c - fix calculating number of x and y traces.

According to Elan's firmware engineers we should not be subtracting 1 form the raw number of x and y traces so that the pitch size is correct. For example, if the touchpad x resolution is 2800 and x trace number is 20, the pitch size of x should be 2800/20 = 140, not 2800/19 = 147.36. Signed-off-by: Duson Lin <dusonlin@emc.com.tw> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
mariux64 · Apr 20, 2015 · 9f42380 · 9f42380
1 parent 090ad32
commit 9f42380
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Showing 2 changed files with 4 additions and 4 deletions.
diff --git a/drivers/input/mouse/elan_i2c_i2c.c b/drivers/input/mouse/elan_i2c_i2c.c
@@ -365,8 +365,8 @@ static int elan_i2c_get_num_traces(struct i2c_client *client,
 		return error;
 	}
 
-	*x_traces = val[0] - 1;
-	*y_traces = val[1] - 1;
+	*x_traces = val[0];
+	*y_traces = val[1];
 
 	return 0;
 }

diff --git a/drivers/input/mouse/elan_i2c_smbus.c b/drivers/input/mouse/elan_i2c_smbus.c
@@ -268,8 +268,8 @@ static int elan_smbus_get_num_traces(struct i2c_client *client,
 		return error;
 	}
 
-	*x_traces = val[1] - 1;
-	*y_traces = val[2] - 1;
+	*x_traces = val[1];
+	*y_traces = val[2];
 
 	return 0;
 }