From 47026b25fc6cd2d7ec85d4a83c472bca20946a94 Mon Sep 17 00:00:00 2001 From: Michael Hennerich Date: Fri, 15 Oct 2010 09:49:07 -0700 Subject: [PATCH] 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 Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/ad7877.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/input/touchscreen/ad7877.c b/drivers/input/touchscreen/ad7877.c index 53f4d79ee530..96c0a0d4b69c 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); -- 2.20.1