From: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> Add documentation for adxl372 3-axis accelerometer. Signed-off-by: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx> --- Documentation/iio/adxl372.rst | 46 +++++++++++++++++++++++++++++++++++ Documentation/iio/index.rst | 1 + 2 files changed, 47 insertions(+) create mode 100644 Documentation/iio/adxl372.rst diff --git a/Documentation/iio/adxl372.rst b/Documentation/iio/adxl372.rst new file mode 100644 index 000000000000..f8fe5f438400 --- /dev/null +++ b/Documentation/iio/adxl372.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver adxl372 +===================== + +Supported chips: + * Analog Devices ADXL372 + Prefix: 'adxl372' + Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL372.pdf + +Author: Stefan Popa <stefan.popa@xxxxxxxxxx> + + +Description +----------- + +The ADXL372 is an ultralow power, 3-axis, ±200 g MEMS accelerometer +that consumes 22 μA at a 3200 Hz output data rate (ODR). + +The ADXL372 provides 12-bit output data at 100 mg/LSB scale factor. + +Using the FIFO Buffer +--------------------- + +The ADXL372 includes a deep, 512 sample FIFO buffer. +The 512 FIFO samples can be allotted in several ways, such as the following: + + 170 sample sets of concurrent 3-axis data + 256 sample sets of concurrent 2-axis data (see scan_elements/in_accel_*_en) + 512 sample sets of single-axis data + 170 sets of impact event peak (x, y, z) + +By default when using the buffer adxl372 will store all +acceleration data. To store only the peak acceleration data, the user must +select the peak data trigger: adxl372-dev0-peak + +The user can set the thresholds for each axis for activity and inactivity in: +- events/in_accel_*_thresh_rising_value +- events/in_accel_*_thresh_falling_value + +An inactivity/activity event is detected when acceleration in all enabled +axes remains below/above a specified threshold for a specified time. The user +can set these timings in: +- events/thresh_falling_period +- events/thresh_rising_period + diff --git a/Documentation/iio/index.rst b/Documentation/iio/index.rst index 58b7a4ebac51..3d0acb1eef86 100644 --- a/Documentation/iio/index.rst +++ b/Documentation/iio/index.rst @@ -10,3 +10,4 @@ Industrial I/O iio_configfs ep93xx_adc + adxl372.rst -- 2.20.1
