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iio: adc: ad4695: Add support for SPI offload

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Add support for SPI offload to the ad4695 driver. SPI offload allows
sampling data at the max sample rate (500kSPS or 1MSPS).

This is developed and tested against the ADI example FPGA design for
this family of ADCs [1].

[1]: http://analogdevicesinc.github.io/hdl/projects/ad469x_fmc/index.html

Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-14-e48a489be48c@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
David Lechner
2025-02-11 19:32:31 +00:00
committed by Jonathan Cameron
parent b7c1e069f5
commit f09f140e3e
2 changed files with 431 additions and 17 deletions
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drivers/iio/adc/Kconfig
+2
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@@ -52,8 +52,10 @@ config AD4695
tristate "Analog Device AD4695 ADC Driver"
depends on SPI
select IIO_BUFFER
select IIO_BUFFER_DMAENGINE
select IIO_TRIGGERED_BUFFER
select REGMAP
select SPI_OFFLOAD
help
Say yes here to build support for Analog Devices AD4695 and similar
analog to digital converters (ADC).
drivers/iio/adc/ad4695.c
+429 -17
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