Some Notes about ARM world

Especially related to AT91SAM9G25 and AT91SAMA5D3 SoCs.

http://free-electrons.com/blog/linux-3-16/ says

Huge cleanup of ADC/touchscreen handling: improvements in the IIO at91_adc driver to support more SoC families, and conversions of several Atmel platforms to use this driver, and then finally removal of the old atmel_tsadcc driver.

root@acqua:/# xinput_calibrator 
	Setting calibration data: 0, 4095, 0, 4095
Calibrating EVDEV driver for "at91_adc" id=6
	current calibration values (from XInput): min_x=0, max_x=4095 and min_y=0, max_y=4095

Doing dynamic recalibration:
	Setting calibration data: 419, 3640, 357, 3781
	--> Making the calibration permanent <--
  copy the snippet below into '/etc/X11/xorg.conf.d/99-calibration.conf' (/usr/share/X11/xorg.conf.d/ in some distro's)
Section "InputClass"
	Identifier	"calibration"
	MatchProduct	"at91_adc"
	Option	"Calibration"	"419 3640 357 3781"
	Option	"SwapAxes"	"0"
EndSection

http://events.linuxfoundation.org/sites/events/files/slides/belloni-alsa-asoc_0.pdf