Input: atmel_mxt_ts - support 12bit resolution
Atmel touchscreen chip can support 12bit resolution and this patch
modifies to get maximum x and y size from platform data.
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Iiro Valkonen <iiro.valkonen@atmel.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 4012436..a97905a 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -196,9 +196,12 @@
#define MXT_PRESS (1 << 6)
#define MXT_DETECT (1 << 7)
+/* Touch orient bits */
+#define MXT_XY_SWITCH (1 << 0)
+#define MXT_X_INVERT (1 << 1)
+#define MXT_Y_INVERT (1 << 2)
+
/* Touchscreen absolute values */
-#define MXT_MAX_XC 0x3ff
-#define MXT_MAX_YC 0x3ff
#define MXT_MAX_AREA 0xff
#define MXT_MAX_FINGER 10
@@ -246,6 +249,8 @@
struct mxt_info info;
struct mxt_finger finger[MXT_MAX_FINGER];
unsigned int irq;
+ unsigned int max_x;
+ unsigned int max_y;
};
static bool mxt_object_readable(unsigned int type)
@@ -549,8 +554,13 @@
if (!(status & (MXT_PRESS | MXT_MOVE)))
return;
- x = (message->message[1] << 2) | ((message->message[3] & ~0x3f) >> 6);
- y = (message->message[2] << 2) | ((message->message[3] & ~0xf3) >> 2);
+ x = (message->message[1] << 4) | ((message->message[3] >> 4) & 0xf);
+ y = (message->message[2] << 4) | ((message->message[3] & 0xf));
+ if (data->max_x < 1024)
+ x = x >> 2;
+ if (data->max_y < 1024)
+ y = y >> 2;
+
area = message->message[4];
dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
@@ -845,6 +855,20 @@
return 0;
}
+static void mxt_calc_resolution(struct mxt_data *data)
+{
+ unsigned int max_x = data->pdata->x_size - 1;
+ unsigned int max_y = data->pdata->y_size - 1;
+
+ if (data->pdata->orient & MXT_XY_SWITCH) {
+ data->max_x = max_y;
+ data->max_y = max_x;
+ } else {
+ data->max_x = max_x;
+ data->max_y = max_y;
+ }
+}
+
static ssize_t mxt_object_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -1052,31 +1076,32 @@
input_dev->open = mxt_input_open;
input_dev->close = mxt_input_close;
+ data->client = client;
+ data->input_dev = input_dev;
+ data->pdata = pdata;
+ data->irq = client->irq;
+
+ mxt_calc_resolution(data);
+
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
/* For single touch */
input_set_abs_params(input_dev, ABS_X,
- 0, MXT_MAX_XC, 0, 0);
+ 0, data->max_x, 0, 0);
input_set_abs_params(input_dev, ABS_Y,
- 0, MXT_MAX_YC, 0, 0);
+ 0, data->max_y, 0, 0);
/* For multi touch */
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
0, MXT_MAX_AREA, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_X,
- 0, MXT_MAX_XC, 0, 0);
+ 0, data->max_x, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
- 0, MXT_MAX_YC, 0, 0);
+ 0, data->max_y, 0, 0);
input_set_drvdata(input_dev, data);
-
- data->client = client;
- data->input_dev = input_dev;
- data->pdata = pdata;
- data->irq = client->irq;
-
i2c_set_clientdata(client, data);
error = mxt_initialize(data);