lis3: update documentation to match latest changes
[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>
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@ -20,18 +20,35 @@ sporting the feature officially called "HP Mobile Data Protection System 3D" or
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models (full list can be found in drivers/hwmon/hp_accel.c) will have their
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axis automatically oriented on standard way (eg: you can directly play
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neverball). The accelerometer data is readable via
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/sys/devices/platform/lis3lv02d.
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/sys/devices/platform/lis3lv02d. Reported values are scaled
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to mg values (1/1000th of earth gravity).
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Sysfs attributes under /sys/devices/platform/lis3lv02d/:
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position - 3D position that the accelerometer reports. Format: "(x,y,z)"
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calibrate - read: values (x, y, z) that are used as the base for input
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class device operation.
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write: forces the base to be recalibrated with the current
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position.
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rate - reports the sampling rate of the accelerometer device in HZ
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rate - read reports the sampling rate of the accelerometer device in HZ.
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write changes sampling rate of the accelerometer device.
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Only values which are supported by HW are accepted.
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selftest - performs selftest for the chip as specified by chip manufacturer.
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This driver also provides an absolute input class device, allowing
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the laptop to act as a pinball machine-esque joystick.
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the laptop to act as a pinball machine-esque joystick. Joystick device can be
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calibrated. Joystick device can be in two different modes.
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By default output values are scaled between -32768 .. 32767. In joystick raw
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mode, joystick and sysfs position entry have the same scale. There can be
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small difference due to input system fuzziness feature.
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Events are also available as input event device.
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Selftest is meant only for hardware diagnostic purposes. It is not meant to be
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used during normal operations. Position data is not corrupted during selftest
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but interrupt behaviour is not guaranteed to work reliably. In test mode, the
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sensing element is internally moved little bit. Selftest measures difference
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between normal mode and test mode. Chip specifications tell the acceptance
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limit for each type of the chip. Limits are provided via platform data
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to allow adjustment of the limits without a change to the actual driver.
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Seltest returns either "OK x y z" or "FAIL x y z" where x, y and z are
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measured difference between modes. Axes are not remapped in selftest mode.
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Measurement values are provided to help HW diagnostic applications to make
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final decision.
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On HP laptops, if the led infrastructure is activated, support for a led
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indicating disk protection will be provided as /sys/class/leds/hp::hddprotect.
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