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

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

     hpacel -- HP 3D DriveGuard accelerometer

     hpacel* at acpi?

     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.

     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.

     The hpacel device driver appeared in NetBSD 6.0.

     Jukka Ruohonen <jruohonen@iki.fi>

     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

BSD					September 7, 2011				      BSD
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