Commit Graph

7 Commits

Author SHA1 Message Date
Stefan Popa 94dbb46c7a iio: adxl372: Add support for I2C communication
The adxl372 is designed to communicate in either SPI or I2C protocol. It
autodetects the format being used, requiring no configuration control to
select the format.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-08 15:54:38 +01:00
Stefan Popa d9e8fd0421 iio: adxl372: Refactor the driver
This patch restructures the existing adxl372 driver by adding a module for
SPI and a header file, while the baseline module deals with the chip-logic.

This is a necessary step, as this driver should support in the future
a similar device which differs only in the type of interface used (I2C
instead of SPI).

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-09-08 15:28:27 +01:00
Stefan Popa 7ec040af6c iio:adxl372: Add filter bandwidth support
This patch adds the option for the user to select the filter bandwidth. The
user can also read the available bandwidths which are always adjusted to be
at most half of the sampling frequency. Furthermore, the currently selected
bandwidth can be read via the read_raw function, while the write_raw sets a
new bandwidth value.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25 09:19:33 +01:00
Stefan Popa 5e605a4df6 iio:adxl372: Add sampling frequency support
This patch adds the option for the user to select the sampling frequency.
Also, the user can read the available frequencies and read the currently
set frequency via the read_raw function. The frequency can be set via the
write_raw function.

When the frequency is set, the bandwidth is also checked and ensured
that it is constrained to at most half of the sampling frequency. Also, the
activity and inactivity timers have to be updated because they depend on
the selected ODR.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25 09:18:35 +01:00
Stefan Popa 1c412a3215 iio: adxl372: Provide validate_trigger and validate_device callbacks
This patch provides a validate_device callback for the trigger which makes
sure that other devices are rejected.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-25 09:16:42 +01:00
Stefan Popa f4f55ce38e iio:adxl372: Add FIFO and interrupts support
This patch adds support for the adxl372 FIFO. In order to accomplish this,
triggered buffers were used.

The number of FIFO samples which trigger the watermark interrupt can be
configured by using the buffer watermark. The FIFO format is determined by
configuring the scan elements for each axis. The FIFO data is pushed to the
IIO device's buffer.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-19 18:13:02 +01:00
Stefan Popa 4097da40f9 iio: adxl372: New driver for Analog Devices ADXL372 Accelerometer
This patch adds basic support for Analog Devices ADXL372 SPI-Bus
Three-Axis Digital Accelerometer.

The device is probed and configured the with some initial default
values. With this basic driver, it is possible to read raw acceleration
data.

Datasheet:
http://www.analog.com/media/en/technical-documentation/data-sheets/ADXL372.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2018-08-19 18:02:22 +01:00