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NetBSD 6.1.5 - man page for hpacel (netbsd section 4)

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
     implemented 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


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