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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>
This commit is contained in:
Joonyoung Shim 2011-04-12 23:14:38 -07:00 committed by Dmitry Torokhov
parent 4203306506
commit 910d805130
1 changed files with 39 additions and 14 deletions
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53
drivers/input/touchscreen/atmel_mxt_ts.c
View File

@ -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_data {
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 @@ static void mxt_input_touchevent(struct mxt_data *data,
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 @@ static int mxt_initialize(struct mxt_data *data)
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 @@ static int __devinit mxt_probe(struct i2c_client *client,
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);