netbsd man page for hpacel

HPACEL(4)						   BSD Kernel Interfaces Manual 						 HPACEL(4)

NAME
     hpacel -- HP 3D DriveGuard accelerometer

SYNOPSIS
     hpacel* at acpi?

DESCRIPTION
     The hpacel device driver supports accelerometers that are commonly available in Hewlett-Packard laptops.  The supported chip is LIS3LV02DL
     from STMicroelectronics, although other chips from the same family, such as LIS3LV02DQ, may also work, provided that the vendor has imple-
     mented suitable ACPI access methods.

     The hpacel driver reports the acceleration readings of the X-, Y-, and Z-axis via the envsys(4) API and the envstat(8) command.

SEE ALSO
     acpi(4), aps(4), hpqlb(4), wmihp(4)

     STMicroelectronics, LIS3LV02DL: 3-Axis - +-2g/+-6g digital output low voltage linear accelerometer. AN2381 Application Note, Revision 1,
     http://www.st.com/stonline/products/literature/anp/12441.pdf, June, 2006.

HISTORY
     The hpacel device driver appeared in NetBSD 6.0.

AUTHORS
     Jukka Ruohonen <jruohonen@iki.fi>

BUGS
     The used accelerometer chip is capable of generating wake-up, direction detection, and free-fall interrupts.  In the ideal situation these
     could be used to evoke possible emergency action.	However, the hpacel driver only reports the readings from the accelerometer via
     sysmon_envsys(9).

BSD
								 September 7, 2011							       BSD