diff options
author | James Morris <jmorris@namei.org> | 2008-11-13 19:29:12 -0500 |
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committer | James Morris <jmorris@namei.org> | 2008-11-13 19:29:12 -0500 |
commit | 2b828925652340277a889cbc11b2d0637f7cdaf7 (patch) | |
tree | 32fcb3d3e466fc419fad2d3717956a5b5ad3d35a /Documentation/hwmon/lis3lv02d | |
parent | 3a3b7ce9336952ea7b9564d976d068a238976c9d (diff) | |
parent | 58e20d8d344b0ee083febb18c2b021d2427e56ca (diff) |
Merge branch 'master' into next
Conflicts:
security/keys/internal.h
security/keys/process_keys.c
security/keys/request_key.c
Fixed conflicts above by using the non 'tsk' versions.
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'Documentation/hwmon/lis3lv02d')
-rw-r--r-- | Documentation/hwmon/lis3lv02d | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/hwmon/lis3lv02d b/Documentation/hwmon/lis3lv02d new file mode 100644 index 000000000000..65dfb0c0fd67 --- /dev/null +++ b/Documentation/hwmon/lis3lv02d | |||
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1 | Kernel driver lis3lv02d | ||
2 | ================== | ||
3 | |||
4 | Supported chips: | ||
5 | |||
6 | * STMicroelectronics LIS3LV02DL and LIS3LV02DQ | ||
7 | |||
8 | Author: | ||
9 | Yan Burman <burman.yan@gmail.com> | ||
10 | Eric Piel <eric.piel@tremplin-utc.net> | ||
11 | |||
12 | |||
13 | Description | ||
14 | ----------- | ||
15 | |||
16 | This driver provides support for the accelerometer found in various HP laptops | ||
17 | sporting the feature officially called "HP Mobile Data Protection System 3D" or | ||
18 | "HP 3D DriveGuard". It detect automatically laptops with this sensor. Known models | ||
19 | (for now the HP 2133, nc6420, nc2510, nc8510, nc84x0, nw9440 and nx9420) will | ||
20 | have their axis automatically oriented on standard way (eg: you can directly | ||
21 | play neverball). The accelerometer data is readable via | ||
22 | /sys/devices/platform/lis3lv02d. | ||
23 | |||
24 | Sysfs attributes under /sys/devices/platform/lis3lv02d/: | ||
25 | position - 3D position that the accelerometer reports. Format: "(x,y,z)" | ||
26 | calibrate - read: values (x, y, z) that are used as the base for input class device operation. | ||
27 | write: forces the base to be recalibrated with the current position. | ||
28 | rate - reports the sampling rate of the accelerometer device in HZ | ||
29 | |||
30 | This driver also provides an absolute input class device, allowing | ||
31 | the laptop to act as a pinball machine-esque joystick. | ||
32 | |||
33 | Axes orientation | ||
34 | ---------------- | ||
35 | |||
36 | For better compatibility between the various laptops. The values reported by | ||
37 | the accelerometer are converted into a "standard" organisation of the axes | ||
38 | (aka "can play neverball out of the box"): | ||
39 | * When the laptop is horizontal the position reported is about 0 for X and Y | ||
40 | and a positive value for Z | ||
41 | * If the left side is elevated, X increases (becomes positive) | ||
42 | * If the front side (where the touchpad is) is elevated, Y decreases (becomes negative) | ||
43 | * If the laptop is put upside-down, Z becomes negative | ||
44 | |||
45 | If your laptop model is not recognized (cf "dmesg"), you can send an email to the | ||
46 | authors to add it to the database. When reporting a new laptop, please include | ||
47 | the output of "dmidecode" plus the value of /sys/devices/platform/lis3lv02d/position | ||
48 | in these four cases. | ||
49 | |||