linux-kernel - [PATCH 1/2] Add ABI documentation for the bmp085 digital pressure sensor.

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Date:	Sat, 26 Jun 2010 13:10:23 +0200
From:	Christoph Mair <christoph.mair@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org,
	Jonathan Cameron <kernel@...23.retrosnub.co.uk>,
	Stefan Schmidt <stefan@...enfreihafen.org>,
	Datta Shubhrajyoti <shubhrajyoti@...com>,
	Christoph Mair <christoph.mair@...il.com>
Subject: [PATCH 1/2] Add ABI documentation for the bmp085 digital pressure sensor.

Signed-off-by: Christoph Mair <christoph.mair@...il.com>
---
 Documentation/ABI/testing/sysfs-i2c-bmp085 |   31 ++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/ABI/testing/sysfs-i2c-bmp085

diff --git a/Documentation/ABI/testing/sysfs-i2c-bmp085 b/Documentation/ABI/testing/sysfs-i2c-bmp085
new file mode 100644
index 0000000..585962a
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-i2c-bmp085
@@ -0,0 +1,31 @@
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input
+Date:		June 2010
+Contact:	Christoph Mair <christoph.mair@...il.com>
+Description:	Start a pressure measurement and read the result. Values
+		represent the ambient air pressure in pascal (0.01 millibar).
+
+		Reading: returns the current air pressure.
+
+
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/temp0_input
+Date:		June 2010
+Contact:	Christoph Mair <christoph.mair@...il.com>
+Description:	Measure the ambient temperature. The returned value represents
+		the ambient temperature in units of 0.1 degree celsius.
+
+		Reading: returns the current temperature.
+
+
+What:		/sys/bus/i2c/devices/<busnum>-<devaddr>/oversampling
+Date:		June 2010
+Contact:	Christoph Mair <christoph.mair@...il.com>
+Description:	Tell the bmp085 to use more samples to calculate a pressure
+		value. When writing to this file the chip will use 2^x samples
+		to calculate the next pressure value with x being the value
+		written. Using this feature will decrease RMS noise and
+		increase the measurement time.
+
+		Reading: returns the current oversampling setting.
+
+		Writing: sets a new oversampling setting.
+		Accepted values: 0..3.
-- 
1.7.1

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