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@xxxxxxxxxxxx>
---
drivers/input/touchscreen/atmel_mxt_ts.c | 16 ++++++++--------
1 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index a9e0b54..2746b0d 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -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) {
--
1.7.7.3
--
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