iio: dac: ad5686: implement new sync() op for the spi bus

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Use of local SPI bus data to manage a collection of SPI transfers and
flush them to the SPI platform driver with the sync() operation. This
allows for faster handling of multiple channel DAC writes, avoiding kernel
overhead per spi_sync() call, which will be helpful when enabling
triggered buffer support. For consistency, the read operation leverages
the same transfer data rather than a stack-allocated array.

Reviewed-by: David Lechner <dlechner@baylibre.com>
Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com>
Signed-off-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>

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Rodrigo Alencar 2026-07-16 13:14:21 +01:00 • committed by Jonathan Cameron

parent 92b7963fb5

commit 154a7560b4

4 changed files with 109 additions and 35 deletions

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128

drivers/iio/dac/ad5686-spi.c

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4

drivers/iio/dac/ad5686.c

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8

drivers/iio/dac/ad5686.h

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2

drivers/iio/dac/ad5696-i2c.c

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