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| author | Michael Hennerich <michael.hennerich@analog.com> | 2012-07-06 10:44:19 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-06 19:12:26 -0700 |
| commit | 6680884a44207efe8ef6bc56b1c932cce2b89994 (patch) | |
| tree | aca3138305a44c4766e19c69d4da43fc16e810d4 /drivers/input/touchscreen/ad7879.c | |
| parent | f2bb26b9b7652287719f08f080c09c2d7ddcf6b5 (diff) | |
| download | lwn-6680884a44207efe8ef6bc56b1c932cce2b89994.tar.gz lwn-6680884a44207efe8ef6bc56b1c932cce2b89994.zip | |
Input: ad7879 - add option to correct xy axis
Sebastian Zenker reported that driver swaps x and y samples when the
touchscreen leads are connected in accordance with the datasheet
specification. Transposed axis can be typically corrected by touch
screen calibration however this bug also negatively influences touch
pressure measurements.
Add an option to correct x and y axis.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reported-and-tested-by: Sebastian Zenker <sebastian.zenker@gmx.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/touchscreen/ad7879.c')
| -rw-r--r-- | drivers/input/touchscreen/ad7879.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index e2482b40da51..e60709261951 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -118,6 +118,7 @@ struct ad7879 { unsigned int irq; bool disabled; /* P: input->mutex */ bool suspended; /* P: input->mutex */ + bool swap_xy; u16 conversion_data[AD7879_NR_SENSE]; char phys[32]; u8 first_conversion_delay; @@ -161,6 +162,9 @@ static int ad7879_report(struct ad7879 *ts) z1 = ts->conversion_data[AD7879_SEQ_Z1] & MAX_12BIT; z2 = ts->conversion_data[AD7879_SEQ_Z2] & MAX_12BIT; + if (ts->swap_xy) + swap(x, y); + /* * The samples processed here are already preprocessed by the AD7879. * The preprocessing function consists of a median and an averaging @@ -520,6 +524,7 @@ struct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, ts->dev = dev; ts->input = input_dev; ts->irq = irq; + ts->swap_xy = pdata->swap_xy; setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts); |