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Input: atmel_mxt_ts - use T9 reportid range to init number of mt slots

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Atmel mxt devices can report one finger for each T9 reportid.
Therefore, this range can be used to report the max number of MT-B slots
to userspace instead of assuming a fixed 10.

Note that mxt_initialized() must complete early, since the input_dev
properties now depend on values in the object table.

Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
This commit is contained in:
Daniel Kurtz 2012-06-28 21:08:22 +08:00 committed by Henrik Rydberg
parent 04a79181c4
commit cb15911509
1 changed files with 8 additions and 8 deletions
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16
drivers/input/touchscreen/atmel_mxt_ts.c
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@ -212,8 +212,6 @@
/* Touchscreen absolute values */
#define MXT_MAX_AREA 0xff
#define MXT_MAX_FINGER 10
struct mxt_info {
u8 family_id;
u8 variant_id;
@ -1086,6 +1084,7 @@ static int __devinit mxt_probe(struct i2c_client *client,
struct mxt_data *data;
struct input_dev *input_dev;
int error;
unsigned int num_mt_slots;
if (!pdata)
return -EINVAL;
@ -1115,6 +1114,10 @@ static int __devinit mxt_probe(struct i2c_client *client,
mxt_calc_resolution(data);
error = mxt_initialize(data);
if (error)
goto err_free_mem;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
@ -1128,9 +1131,10 @@ static int __devinit mxt_probe(struct i2c_client *client,
0, 255, 0, 0);
/* For multi touch */
error = input_mt_init_slots(input_dev, MXT_MAX_FINGER);
num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1;
error = input_mt_init_slots(input_dev, num_mt_slots);
if (error)
goto err_free_mem;
goto err_free_object;
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,
@ -1143,10 +1147,6 @@ static int __devinit mxt_probe(struct i2c_client *client,
input_set_drvdata(input_dev, data);
i2c_set_clientdata(client, data);
error = mxt_initialize(data);
if (error)
goto err_free_mem;
error = request_threaded_irq(client->irq, NULL, mxt_interrupt,
pdata->irqflags, client->name, data);
if (error) {