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lis3: update documentation to match latest changes

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[akpm@linux-foundation.org: s/q/g/ (Randy)]
Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Acked-by: Éric Piel <Eric.Piel@tremplin-utc.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Samu Onkalo 2009-12-14 18:01:46 -08:00 committed by Linus Torvalds
parent 32496c76b7
commit e956e6b770
1 changed files with 24 additions and 7 deletions
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31
Documentation/hwmon/lis3lv02d
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@ -20,18 +20,35 @@ sporting the feature officially called "HP Mobile Data Protection System 3D" or
models (full list can be found in drivers/hwmon/hp_accel.c) will have their
axis automatically oriented on standard way (eg: you can directly play
neverball). The accelerometer data is readable via
/sys/devices/platform/lis3lv02d.
/sys/devices/platform/lis3lv02d. Reported values are scaled
to mg values (1/1000th of earth gravity).
Sysfs attributes under /sys/devices/platform/lis3lv02d/:
position - 3D position that the accelerometer reports. Format: "(x,y,z)"
calibrate - read: values (x, y, z) that are used as the base for input
class device operation.
write: forces the base to be recalibrated with the current
position.
rate - reports the sampling rate of the accelerometer device in HZ
rate - read reports the sampling rate of the accelerometer device in HZ.
write changes sampling rate of the accelerometer device.
Only values which are supported by HW are accepted.
selftest - performs selftest for the chip as specified by chip manufacturer.
This driver also provides an absolute input class device, allowing
the laptop to act as a pinball machine-esque joystick.
the laptop to act as a pinball machine-esque joystick. Joystick device can be
calibrated. Joystick device can be in two different modes.
By default output values are scaled between -32768 .. 32767. In joystick raw
mode, joystick and sysfs position entry have the same scale. There can be
small difference due to input system fuzziness feature.
Events are also available as input event device.
Selftest is meant only for hardware diagnostic purposes. It is not meant to be
used during normal operations. Position data is not corrupted during selftest
but interrupt behaviour is not guaranteed to work reliably. In test mode, the
sensing element is internally moved little bit. Selftest measures difference
between normal mode and test mode. Chip specifications tell the acceptance
limit for each type of the chip. Limits are provided via platform data
to allow adjustment of the limits without a change to the actual driver.
Seltest returns either "OK x y z" or "FAIL x y z" where x, y and z are
measured difference between modes. Axes are not remapped in selftest mode.
Measurement values are provided to help HW diagnostic applications to make
final decision.
On HP laptops, if the led infrastructure is activated, support for a led
indicating disk protection will be provided as /sys/class/leds/hp::hddprotect.