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Goodix touchscreens export through their registers a Product ID and
Firmware Version. The Product ID is an ASCII encoding of the product name
(e.g.: "911").
Export to sysfs (through the input subsystem) the product id and firmware
version read from the device rather than using constant values.
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Fix sparse warning:
drivers/input/touchscreen/goodix.c:182:26: warning: Variable length array is used.
Replace the variable length array with fixed length.
Some Goodix devices have maximum 5 touch points, while others have 10 touch
points. Using the maximum length (80 bytes) for all devices will lead to
wasting 40 bytes on stack when using devices with maximum 5 touch points.
However, that is preferable to using kmalloc which will use even more
resources.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Fix alignment to match open parenthesis detected by running checkpatch.pl
--strict.
Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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The MSB of the first byte read via I2C at the coordinates address
indicates whether the data is valid or ready (called "buffer status" in
the datasheets) when an interrupt is raised. Previously, this bit was
ignored, which resulted in a lot of incorrect detections of "finger
removed" events.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This change adds device tree support and binding information for Goodix
GT9xx series touchscreen controller. It also adds support for 5-finger
chips, like GT911 and GT912, which can be found on ARM tablets, such as
Wexler TAB7200 and MSI Primo73.
Datasheets can be found here:
https://drive.google.com/folderview?id=0BxCVOQS3ZymGfmJyY2RKbE5XbVlKNlktVTlwV0lxNEdxd2dzeWZER094cmJPVnMxN1F0Yzg&usp=sharing
Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Use max number of touches from device config instead of hardcoding.
Signed-off-by: Aleksei Mamlin <mamlinav@gmail.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Acked-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Antonio Ospite <ao2@ao2.it>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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Add a driver for the Goodix touchscreen panel found in Onda v975w tablets.
The driver is based off the Android driver gt9xx.c found in some Android
code dumps, but now bears no resemblance to the original driver.
The driver was tested on the aforementioned tablet.
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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