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authorÉric Piel <eric.piel@tremplin-utc.net>2009-12-14 18:01:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 08:53:36 -0800
commitbc62c1471773fc32adcfc05100abd16fa2b6e126 (patch)
tree34894261672d0c73c01b46ed92ebad7eb75ea8c4 /Documentation/hwmon/lis3lv02d
parent66c8569bf990064b3f11e0f211a81a46e0b627ff (diff)
downloadop-kernel-dev-bc62c1471773fc32adcfc05100abd16fa2b6e126.zip
op-kernel-dev-bc62c1471773fc32adcfc05100abd16fa2b6e126.tar.gz
lis3: update documentation and comments
Most of the documentation and comments were written when the driver was only supporting one type of chip, only via ACPI/HP. Update the info to the much clearer understanding that we have now. Signed-off-by: Éric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/hwmon/lis3lv02d')
-rw-r--r--Documentation/hwmon/lis3lv02d24
1 files changed, 14 insertions, 10 deletions
diff --git a/Documentation/hwmon/lis3lv02d b/Documentation/hwmon/lis3lv02d
index effe949..21f0902 100644
--- a/Documentation/hwmon/lis3lv02d
+++ b/Documentation/hwmon/lis3lv02d
@@ -3,7 +3,8 @@ Kernel driver lis3lv02d
Supported chips:
- * STMicroelectronics LIS3LV02DL and LIS3LV02DQ
+ * STMicroelectronics LIS3LV02DL, LIS3LV02DQ (12 bits precision)
+ * STMicroelectronics LIS302DL, LIS3L02DQ, LIS331DL (8 bits)
Authors:
Yan Burman <burman.yan@gmail.com>
@@ -13,13 +14,12 @@ Authors:
Description
-----------
-This driver provides support for the accelerometer found in various HP
-laptops sporting the feature officially called "HP Mobile Data
-Protection System 3D" or "HP 3D DriveGuard". It detects automatically
-laptops with this sensor. Known models (for now the HP 2133, nc6420,
-nc2510, nc8510, nc84x0, nw9440 and nx9420) will have their axis
-automatically oriented on standard way (eg: you can directly play
-neverball). The accelerometer data is readable via
+This driver provides support for the accelerometer found in various HP laptops
+sporting the feature officially called "HP Mobile Data Protection System 3D" or
+"HP 3D DriveGuard". It detects automatically laptops with this sensor. Known
+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.
Sysfs attributes under /sys/devices/platform/lis3lv02d/:
@@ -33,12 +33,16 @@ rate - reports the sampling rate of the accelerometer device in HZ
This driver also provides an absolute input class device, allowing
the laptop to act as a pinball machine-esque joystick.
+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.
+
Another feature of the driver is misc device called "freefall" that
acts similar to /dev/rtc and reacts on free-fall interrupts received
from the device. It supports blocking operations, poll/select and
fasync operation modes. You must read 1 bytes from the device. The
result is number of free-fall interrupts since the last successful
-read (or 255 if number of interrupts would not fit).
+read (or 255 if number of interrupts would not fit). See the hpfall.c
+file for an example on using the device.
Axes orientation
@@ -55,7 +59,7 @@ the accelerometer are converted into a "standard" organisation of the axes
* If the laptop is put upside-down, Z becomes negative
If your laptop model is not recognized (cf "dmesg"), you can send an
-email to the authors to add it to the database. When reporting a new
+email to the maintainer to add it to the database. When reporting a new
laptop, please include the output of "dmidecode" plus the value of
/sys/devices/platform/lis3lv02d/position in these four cases.
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