| 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273 |
- .. SPDX-License-Identifier: GPL-2.0-only
- ==============
- AD3552R driver
- ==============
- Device driver for Analog Devices Inc. AD35XXR series of DACs. The module name
- is ``ad3552r``.
- With the same module name, two different driver variants are available, the
- ``generic spi`` variant, to be used with any classic SPI controllers, and the
- ``hs`` (high speed) variant, for an ADI ``axi-dac`` (IP core) based controller
- that allows to reach the maximum sample rate supported from the DACs, using the
- DMA transfer and all the SPI lines available (D/QDSPI)..
- The high speed driver variant is intended to be used with the ``adi-axi-dac``
- backend support enabled, that is enabled by default when the driver is selected.
- Supported devices
- =================
- * `AD3541R <https://www.analog.com/en/products/ad3541r.html>`_
- * `AD3542R <https://www.analog.com/en/products/ad3542r.html>`_
- * `AD3551R <https://www.analog.com/en/products/ad3551r.html>`_
- * `AD3552R <https://www.analog.com/en/products/ad3552r.html>`_
- Wiring connections
- ==================
- Generic SPI
- -----------
- Use the classic SPI S_CLK/CS/SDO/SDI connection.
- High speed (using axi-dac backend)
- ----------------------------------
- ::
- .-----------------. .-------.
- | |--- D/QSPI -----| |
- | DAC IP CORE |--- SPI S_CLK --| DAC |
- | |--- SPI CS -----| |
- | |--- LDAC -------| |
- | |--- RESET ------| |
- |_________________| |_______|
- High speed features
- ===================
- Device attributes
- -----------------
- The following table shows the ad35xxr related device debug files, found in the
- specific debugfs path ``/sys/kernel/debug/iio/iio:deviceX``.
- +-----------------------+------------------------------------------------------+
- | Debugfs device files | Description |
- +-----------------------+------------------------------------------------------+
- | data_source | The used data source, as |
- | | ``normal``, ``ramp-16bit``, etc. |
- +-----------------------+------------------------------------------------------+
- | data_source_available | The available data sources. |
- +-----------------------+------------------------------------------------------+
- Usage examples
- --------------
- .. code-block:: bash
- root:/sys/bus/iio/devices/iio:device0# cat data_source
- normal
- root:/sys/bus/iio/devices/iio:device0# echo -n ramp-16bit > data_source
- root:/sys/bus/iio/devices/iio:device0# cat data_source
- ramp-16bit
|
