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Diffstat (limited to 'Documentation/ABI/testing/sysfs-i2c-bmp085')
-rw-r--r-- | Documentation/ABI/testing/sysfs-i2c-bmp085 | 31 |
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diff --git a/Documentation/ABI/testing/sysfs-i2c-bmp085 b/Documentation/ABI/testing/sysfs-i2c-bmp085 new file mode 100644 index 000000000000..585962ad0465 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-i2c-bmp085 | |||
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1 | What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input | ||
2 | Date: June 2010 | ||
3 | Contact: Christoph Mair <christoph.mair@gmail.com> | ||
4 | Description: Start a pressure measurement and read the result. Values | ||
5 | represent the ambient air pressure in pascal (0.01 millibar). | ||
6 | |||
7 | Reading: returns the current air pressure. | ||
8 | |||
9 | |||
10 | What: /sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input | ||
11 | Date: June 2010 | ||
12 | Contact: Christoph Mair <christoph.mair@gmail.com> | ||
13 | Description: Measure the ambient temperature. The returned value represents | ||
14 | the ambient temperature in units of 0.1 degree celsius. | ||
15 | |||
16 | Reading: returns the current temperature. | ||
17 | |||
18 | |||
19 | What: /sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling | ||
20 | Date: June 2010 | ||
21 | Contact: Christoph Mair <christoph.mair@gmail.com> | ||
22 | Description: Tell the bmp085 to use more samples to calculate a pressure | ||
23 | value. When writing to this file the chip will use 2^x samples | ||
24 | to calculate the next pressure value with x being the value | ||
25 | written. Using this feature will decrease RMS noise and | ||
26 | increase the measurement time. | ||
27 | |||
28 | Reading: returns the current oversampling setting. | ||
29 | |||
30 | Writing: sets a new oversampling setting. | ||
31 | Accepted values: 0..3. | ||