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Message-Id: <1330545489-31169-3-git-send-email-eric.andersson@unixphere.com> Date: Wed, 29 Feb 2012 20:58:08 +0100 From: Eric Andersson <eric.andersson@...xphere.com> To: linux-kernel@...r.kernel.org Cc: arnd@...db.de, gregkh@...uxfoundation.org, christoph.mair@...il.com, stefan.nilsson@...xphere.com, zhengguang.guo@...ch-sensortec.com, peter.moeller@...bosch.com, Eric Andersson <eric.andersson@...xphere.com> Subject: [PATCH 2/3] Documentation: add sysfs ABI documentation for bmp18x This patch adds sysfs documentation for Bosch Sensortec's BMP18x pressure sensors. Reviewed-by: Stefan Nilsson <stefan.nilsson@...xphere.com> Signed-off-by: Eric Andersson <eric.andersson@...xphere.com> --- Documentation/ABI/testing/sysfs-i2c-bmp18x | 31 ++++++++++++++++++++++++++++ Documentation/ABI/testing/sysfs-spi-bmp18x | 31 ++++++++++++++++++++++++++++ 2 files changed, 62 insertions(+), 0 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-i2c-bmp18x create mode 100644 Documentation/ABI/testing/sysfs-spi-bmp18x diff --git a/Documentation/ABI/testing/sysfs-i2c-bmp18x b/Documentation/ABI/testing/sysfs-i2c-bmp18x new file mode 100644 index 0000000..f6c5799 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-i2c-bmp18x @@ -0,0 +1,31 @@ +What: /sys/bus/i2c/devices/<busnum>-<devaddr>/pressure0_input +Date: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.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: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.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: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.com> +Description: Tell the bmp18x 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. diff --git a/Documentation/ABI/testing/sysfs-spi-bmp18x b/Documentation/ABI/testing/sysfs-spi-bmp18x new file mode 100644 index 0000000..e3a9be3 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-spi-bmp18x @@ -0,0 +1,31 @@ +What: /sys/bus/spi/devices/spi<busnum>.<chipselect>/pressure0_input +Date: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.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/spi/devices/spi<busnum>.<chipselect>/temp0_input +Date: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.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/spi/devices/spi<busnum>.<chipselect>/oversampling +Date: February 2012 +Contact: Eric Andersson <eric.andersson@...xphere.com> +Description: Tell the bmp18x 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. -- 1.7.3.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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