Input: wacom - pass touch resolution to clients through input_absinfo

[cascardo/linux.git] / drivers / input / tablet / wacom_wac.c

diff --git a/drivers/input/tablet/wacom_wac.c b/drivers/input/tablet/wacom_wac.c
index f44c822..367fa82 100644 (file)
--- a/drivers/input/tablet/wacom_wac.c
+++ b/drivers/input/tablet/wacom_wac.c
@@ -1101,6 +1101,13 @@ void wacom_setup_device_quirks(struct wacom_features *features)
        }
 }
 
+static unsigned int wacom_calculate_touch_res(unsigned int logical_max,
+                                             unsigned int physical_max)
+{
+       /* Touch physical dimensions are in 100th of mm */
+       return (logical_max * 100) / physical_max;
+}
+
 void wacom_setup_input_capabilities(struct input_dev *input_dev,
                                    struct wacom_wac *wacom_wac)
 {
@@ -1228,8 +1235,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
        case TABLETPC:
                if (features->device_type == BTN_TOOL_DOUBLETAP ||
                    features->device_type == BTN_TOOL_TRIPLETAP) {
-                       input_set_abs_params(input_dev, ABS_RX, 0, features->x_phy, 0, 0);
-                       input_set_abs_params(input_dev, ABS_RY, 0, features->y_phy, 0, 0);
+                       input_abs_set_res(input_dev, ABS_X,
+                               wacom_calculate_touch_res(features->x_max,
+                                                       features->x_phy));
+                       input_abs_set_res(input_dev, ABS_Y,
+                               wacom_calculate_touch_res(features->y_max,
+                                                       features->y_phy));
                        __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
                }
 
@@ -1272,6 +1283,12 @@ void wacom_setup_input_capabilities(struct input_dev *input_dev,
                        input_set_abs_params(input_dev, ABS_MT_PRESSURE,
                                             0, features->pressure_max,
                                             features->pressure_fuzz, 0);
+                       input_abs_set_res(input_dev, ABS_X,
+                               wacom_calculate_touch_res(features->x_max,
+                                                       features->x_phy));
+                       input_abs_set_res(input_dev, ABS_Y,
+                               wacom_calculate_touch_res(features->y_max,
+                                                       features->y_phy));
                } else if (features->device_type == BTN_TOOL_PEN) {
                        __set_bit(BTN_TOOL_RUBBER, input_dev->keybit);
                        __set_bit(BTN_TOOL_PEN, input_dev->keybit);