iio: adc: ad7380: fix SPI offload trigger rate

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Add a special case to double the SPI offload trigger rate when all
channels of a single-ended chip are enabled in a buffered read.

The single-ended chips in the AD738x family can only do simultaneous
sampling of half their channels and have a multiplexer to allow reading
the other half. To comply with the IIO definition of sampling_frequency,
we need to trigger twice as often when the sequencer is enabled to so
that both banks can be read in a single sample period.

Fixes: bbeaec81a0 ("iio: ad7380: add support for SPI offload")
Signed-off-by: David Lechner <dlechner@baylibre.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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David Lechner 2025-09-19 15:50:34 -05:00 • committed by Jonathan Cameron

parent 9b45744bf0

commit 632757312d

1 changed files with 8 additions and 0 deletions

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drivers/iio/adc/ad7380.c

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