drivers: iio: accel: adxl312 and adxl314 support

ADXL312 and ADXL314 are small, thin, low power, 3-axis accelerometers
with high resolution (13-bit) measurement up to +/-12 g and +/- 200 g
respectively.

Implement support for ADXL312 and ADXL314 by extending the ADXL313
driver.

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL312.pdf
Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL314.pdf
Signed-off-by: George Mois <george.mois@analog.com>
Link: https://lore.kernel.org/r/20220905132018.364900-2-george.mois@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

iio: accel: adxl313: Fix alignment for DMA safety

____cacheline_aligned is insufficient guarantee for non-coherent DMA.
Switch to the updated IIO_DMA_MINALIGN definition.

Fixes: 636d44633039 ("iio: accel: Add driver support for ADXL313")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-3-jic23@kernel.org

iio:accel:adxl313: Move exports into IIO_ADXL313 namespace

In order to avoid unnecessary pollution of the global symbol namespace
move the driver core exports into their own namespace and import
that into the two bus modules.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lucas Stankus <lucas.p.stankus@gmail.com>
Link: https://lore.kernel.org/r/20220116180535.2367780-6-jic23@kernel.org

iio: accel: Add driver support for ADXL313

ADXL313 is a small, thin, low power, 3-axis accelerometer with high
resolution measurement up to +/-4g. It includes an integrated 32-level
FIFO and has activity and inactivity sensing capabilities.

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
Signed-off-by: Lucas Stankus <lucas.p.stankus@gmail.com>
Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/d16e2d1967e46bb2b1024b6d23bc4889da77dc6b.1630523106.git.lucas.p.stankus@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>