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ad5791 offload #2616

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ad5791 offload #2616

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Commits on Oct 23, 2024

  1. dt-bindings: adi,ad5791.yaml: Add support optional gpios 

    Depending on board layout, the ad57xx may need control of reset, clear,
and ldac pins by the host driver. Add optional bindings for these gpios.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  2. iio: dac: ad5791: Include chip_info in device match tables 

    Include a chip info struct in device SPI and device OF match tables to
provide channel definitions for each particular ADC model and eliminate
device enum.

Suggested-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  3. iio: dac: ad5791: Add reset, clr and ldac gpios 

    The ad7591 has reset, clr and ldac gpios. For the DAC to output data
writen to the data register the state of these gpios has to be:
 	RESET=1, CLR=1, LDAC=0

Add these gpios to the driver making them optional in case they
are fixed on the pcb.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  4. iio: dac: ad5791: Use devm_regulator_get_enable_read_voltage 

    Simplify probe by using of the devm_regulator_get_enable_read_voltage.

Suggested-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  5. iio: dac: ad5791: Use devm_iio_device_register 

    Use devm_iio_device_register to automatically free resources.

Suggested-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  6. arm: dts: socfpga: Remove reference to gpio-bank-width 

    This property is not defined on the binidngs, and is not used by the
driver. Remove it

Suggested-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  7. arm: dts: de10_nano: Add bi-directional gpios 

    This adds the bi-directional gpio block to the d10 nano

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  8. arm: dts: de10_nano: Add support for ad57xx. 

    Add devicetree for ad57xx on de10nano.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  9. spi: axi-spi-engine-ex: Dont write buf to offload SDO on tx stream 

    To allow offload to stream a "tx" type of xfer we need the write flag
set but no messages on the SDO memory of the offload engine. but the
current code relies on the tx_buf pointer for both of these operations,
so there is no way to separate the two.

The offload patches currently on development for upstream add flags on
core spi structures to flag an offload xfer as a streaming xfer.

While those patches get review and are ready to backport to the adi
tree, Workaround this limitation by checking if the tx_buf address is
-1 to flag it as "streaming type".

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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  10. iio: dac: ad5791: Add offload support 

    Add spi offload support to stream tx buffers using dma.
This allows loading samples to the  dac with a rate of 1 MSPS.

Signed-off-by: Axel Haslam <ahaslam@baylibre.com>
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