diff options
Diffstat (limited to 'Documentation/hwmon/lis3lv02d')
| -rw-r--r-- | Documentation/hwmon/lis3lv02d | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/Documentation/hwmon/lis3lv02d b/Documentation/hwmon/lis3lv02d index effe949a7282..21f090252209 100644 --- a/Documentation/hwmon/lis3lv02d +++ b/Documentation/hwmon/lis3lv02d | |||
| @@ -3,7 +3,8 @@ Kernel driver lis3lv02d | |||
| 3 | 3 | ||
| 4 | Supported chips: | 4 | Supported chips: |
| 5 | 5 | ||
| 6 | * STMicroelectronics LIS3LV02DL and LIS3LV02DQ | 6 | * STMicroelectronics LIS3LV02DL, LIS3LV02DQ (12 bits precision) |
| 7 | * STMicroelectronics LIS302DL, LIS3L02DQ, LIS331DL (8 bits) | ||
| 7 | 8 | ||
| 8 | Authors: | 9 | Authors: |
| 9 | Yan Burman <burman.yan@gmail.com> | 10 | Yan Burman <burman.yan@gmail.com> |
| @@ -13,13 +14,12 @@ Authors: | |||
| 13 | Description | 14 | Description |
| 14 | ----------- | 15 | ----------- |
| 15 | 16 | ||
| 16 | This driver provides support for the accelerometer found in various HP | 17 | This driver provides support for the accelerometer found in various HP laptops |
| 17 | laptops sporting the feature officially called "HP Mobile Data | 18 | sporting the feature officially called "HP Mobile Data Protection System 3D" or |
| 18 | Protection System 3D" or "HP 3D DriveGuard". It detects automatically | 19 | "HP 3D DriveGuard". It detects automatically laptops with this sensor. Known |
| 19 | laptops with this sensor. Known models (for now the HP 2133, nc6420, | 20 | models (full list can be found in drivers/hwmon/hp_accel.c) will have their |
| 20 | nc2510, nc8510, nc84x0, nw9440 and nx9420) will have their axis | 21 | axis automatically oriented on standard way (eg: you can directly play |
| 21 | automatically oriented on standard way (eg: you can directly play | 22 | neverball). The accelerometer data is readable via |
| 22 | neverball). The accelerometer data is readable via | ||
| 23 | /sys/devices/platform/lis3lv02d. | 23 | /sys/devices/platform/lis3lv02d. |
| 24 | 24 | ||
| 25 | Sysfs attributes under /sys/devices/platform/lis3lv02d/: | 25 | Sysfs attributes under /sys/devices/platform/lis3lv02d/: |
| @@ -33,12 +33,16 @@ rate - reports the sampling rate of the accelerometer device in HZ | |||
| 33 | This driver also provides an absolute input class device, allowing | 33 | This driver also provides an absolute input class device, allowing |
| 34 | the laptop to act as a pinball machine-esque joystick. | 34 | the laptop to act as a pinball machine-esque joystick. |
| 35 | 35 | ||
| 36 | On HP laptops, if the led infrastructure is activated, support for a led | ||
| 37 | indicating disk protection will be provided as /sys/class/leds/hp::hddprotect. | ||
| 38 | |||
| 36 | Another feature of the driver is misc device called "freefall" that | 39 | Another feature of the driver is misc device called "freefall" that |
| 37 | acts similar to /dev/rtc and reacts on free-fall interrupts received | 40 | acts similar to /dev/rtc and reacts on free-fall interrupts received |
| 38 | from the device. It supports blocking operations, poll/select and | 41 | from the device. It supports blocking operations, poll/select and |
| 39 | fasync operation modes. You must read 1 bytes from the device. The | 42 | fasync operation modes. You must read 1 bytes from the device. The |
| 40 | result is number of free-fall interrupts since the last successful | 43 | result is number of free-fall interrupts since the last successful |
| 41 | read (or 255 if number of interrupts would not fit). | 44 | read (or 255 if number of interrupts would not fit). See the hpfall.c |
| 45 | file for an example on using the device. | ||
| 42 | 46 | ||
| 43 | 47 | ||
| 44 | Axes orientation | 48 | Axes orientation |
| @@ -55,7 +59,7 @@ the accelerometer are converted into a "standard" organisation of the axes | |||
| 55 | * If the laptop is put upside-down, Z becomes negative | 59 | * If the laptop is put upside-down, Z becomes negative |
| 56 | 60 | ||
| 57 | If your laptop model is not recognized (cf "dmesg"), you can send an | 61 | If your laptop model is not recognized (cf "dmesg"), you can send an |
| 58 | email to the authors to add it to the database. When reporting a new | 62 | email to the maintainer to add it to the database. When reporting a new |
| 59 | laptop, please include the output of "dmidecode" plus the value of | 63 | laptop, please include the output of "dmidecode" plus the value of |
| 60 | /sys/devices/platform/lis3lv02d/position in these four cases. | 64 | /sys/devices/platform/lis3lv02d/position in these four cases. |
| 61 | 65 | ||