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| author | Michael Hennerich <michael.hennerich@analog.com> | 2010-10-15 16:49:07 (GMT) |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2010-10-18 04:12:18 (GMT) |
| commit | 47026b25fc6cd2d7ec85d4a83c472bca20946a94 (patch) | |
| tree | 2a5d1c118a49c7d5c34271212dec4f30c3bb2915 /drivers/input/touchscreen/ad7877.c | |
| parent | e92c27fb5319d8b12f0c291c827e252f0e17afc4 (diff) | |
| download | linux-47026b25fc6cd2d7ec85d4a83c472bca20946a94.tar.xz | |
Input: ad7877 - implement EV_KEY:BTN_TOUCH reporting
Some input users such as Android or X require BTN_TOUCH events.
Implement EV_KEY:BTN_TOUCH and make sure that the release event
is not erroneous scheduled without a preceding valid touch.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input/touchscreen/ad7877.c')
| -rw-r--r-- | drivers/input/touchscreen/ad7877.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index 53f4d79..96c0a0d 100644 --- a/drivers/input/touchscreen/ad7877.c +++ b/drivers/input/touchscreen/ad7877.c @@ -333,7 +333,7 @@ static int ad7877_read_adc(struct spi_device *spi, unsigned command) return status ? : sample; } -static void ad7877_rx(struct ad7877 *ts) +static int ad7877_rx(struct ad7877 *ts) { struct input_dev *input_dev = ts->input; unsigned Rt; @@ -360,11 +360,17 @@ static void ad7877_rx(struct ad7877 *ts) Rt /= z1; Rt = (Rt + 2047) >> 12; + if (!timer_pending(&ts->timer)) + input_report_key(input_dev, BTN_TOUCH, 1); + input_report_abs(input_dev, ABS_X, x); input_report_abs(input_dev, ABS_Y, y); input_report_abs(input_dev, ABS_PRESSURE, Rt); input_sync(input_dev); + return 0; } + + return -EINVAL; } static inline void ad7877_ts_event_release(struct ad7877 *ts) @@ -372,6 +378,7 @@ static inline void ad7877_ts_event_release(struct ad7877 *ts) struct input_dev *input_dev = ts->input; input_report_abs(input_dev, ABS_PRESSURE, 0); + input_report_key(input_dev, BTN_TOUCH, 0); input_sync(input_dev); } @@ -413,11 +420,9 @@ static void ad7877_callback(void *_ts) struct ad7877 *ts = _ts; spin_lock_irq(&ts->lock); - - ad7877_rx(ts); + if (!ad7877_rx(ts)) + mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); ts->pending = 0; - mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); - spin_unlock_irq(&ts->lock); } @@ -728,6 +733,8 @@ static int __devinit ad7877_probe(struct spi_device *spi) input_dev->phys = ts->phys; input_dev->dev.parent = &spi->dev; + __set_bit(EV_KEY, input_dev->evbit); + __set_bit(BTN_TOUCH, input_dev->keybit); __set_bit(EV_ABS, input_dev->evbit); __set_bit(ABS_X, input_dev->absbit); __set_bit(ABS_Y, input_dev->absbit); |