atmel_mxt - Add atmel MXT touchscreen driver (Acer c720p)

Operating Systems / DragonFlyBSD - Matthew Dillon [apollo.backplane.com] - 14 August 2014 20:52 UTC

- Implements the communications infrastructure on the hardware backend and emulates an elographics tablet on the frontend.

- X Configuration is:

Section "InputDevice" Identifier "TouchScreen0" Driver "elographics" Option "Device" "/dev/atmel1-4a" # Option "ZAxisMapping" "4 5 6 7" EndSection

- System configuration is (in /boot/loader.conf):

ig4_load="YES" atmel_mxt_load="YES"

- Currently only tested and only likely to work with the Acer c720p. Can do basic touchscreen operations... hold-move-and-release for button-1. Can move or resize windows (you may want to make your resize widgets bigger). Can hit buttons and hotlinks in browsers. Cannot scroll a browser window on its own.

- Noise issues. I've noticed that both my chromebooks have a lot of mouse pointer jitter with both the trackpad and the touchscreen, more than I can actually fix. I've noticed some complaints on the linux forums too so it aint just us.

The jitter is reduced if you put the laptop on your lap, and appears to go away entirely if the laptop is on your lap AND the power is disconnected (i.e. running on battery).

45be1c6 atmel_mxt - Add atmel MXT touchscreen driver (Acer c720p)
sys/dev/smbus/Makefile | 2 +-
sys/dev/smbus/atmel_mxt/Makefile | 10 +
sys/dev/smbus/atmel_mxt/atmel_mxt.c | 1090 ++++++++++++++++++++++++++++++++++
sys/dev/smbus/atmel_mxt/atmel_mxt.h | 35 ++
sys/dev/smbus/atmel_mxt/obp-utils.c | 122 ++++
sys/dev/smbus/atmel_mxt/obp-utils.h | 495 +++++++++++++++
sys/dev/smbus/atmel_mxt/test_atmel.c | 242 ++++++++
7 files changed, 1995 insertions(+), 1 deletion(-)

Upstream: gitweb.dragonflybsd.org

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