The patch titled
bmp085: Add interface documentation and link to datasheet.
has been added to the -mm tree. Its filename is
bmp085-add-interface-documentation-and-link-to-datasheet.patch
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------------------------------------------------------
Subject: bmp085: Add interface documentation and link to datasheet.
From: Christoph Mair <christoph.mair@xxxxxxxxx>
Signed-off-by: Christoph Mair <christoph.mair@xxxxxxxxx>
Cc: Jonathan Cameron <jic23@xxxxxxxxx>
Cc: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Cc: Datta Shubhrajyoti <shubhrajyoti@xxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/misc/bmp085.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff -puN drivers/misc/bmp085.c~bmp085-add-interface-documentation-and-link-to-datasheet drivers/misc/bmp085.c
--- a/drivers/misc/bmp085.c~bmp085-add-interface-documentation-and-link-to-datasheet
+++ a/drivers/misc/bmp085.c
@@ -1,5 +1,32 @@
/* Copyright (c) 2010 Christoph Mair <christoph.mair@xxxxxxxxx>
+ This driver supports the bmp085 digital barometric pressure
+ and temperature sensor from Bosch Sensortec. The datasheet
+ is avaliable from their website:
+ http://www.bosch-sensortec.com/content/language1/downloads/BST-BMP085-DS000-05.pdf
+
+ A pressure measurement is issued by reading from pressure0_input.
+ The return value ranges from 30000 to 110000 pascal with a resulution
+ of 1 pascal (0.01 millibar) which enables measurements from 9000m above
+ to 500m below sea level.
+
+ The temperature can be read from temp0_input. Values range from
+ -400 to 850 representing the ambient temperature in degree celsius
+ multiplied by 10.The resolution is 0.1 celsius.
+
+ Because ambient pressure is temperature dependent, a temperature
+ measurement will be executed automatically even if the user is reading
+ from pressure0_input. This happens if the last temperature measurement
+ has been executed more then one second ago.
+
+ To decrease RMS noise from pressure measurements, the bmp085 can
+ autonomously calculate the average of up to eight samples. This is
+ set up by writing to the oversampling sysfs file. Accepted values
+ are 0, 1, 2 and 3. 2^x when x is the value written to this file
+ specifies the number of samples used to calculate the ambient pressure.
+ RMS noise is specified with six pascal (without averaging) and decreases
+ down to 3 pascal when using an oversampling setting of 3.
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
_
Patches currently in -mm which might be from christoph.mair@xxxxxxxxx are
drivers-misc-support-for-the-pressure-sensor-bmp085-from-bosch-sensortec.patch
drivers-misc-support-for-the-pressure-sensor-bmp085-from-bosch-sensortec-fix.patch
drivers-misc-support-for-the-pressure-sensor-bmp085-from-bosch-sensortec-update.patch
add-abi-documentation-for-the-bmp085-digital-pressure-sensor.patch
bmp085-add-interface-documentation-and-link-to-datasheet.patch
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