iio: adc: ad_sigma_delta: Check for previous ready signals

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It can happen if a previous conversion was aborted the ADC pulls down
the R̅D̅Y̅ line but the event wasn't handled before. In that case enabling
the irq might immediately fire (depending on the irq controller
capabilities) and even with a rdy-gpio isn't identified as an unrelated
one.

To cure that problem check for a pending event before the measurement is
started and clear it if needed.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://patch.msgid.link/3ec6b61fb1e527e935133dc56f589aab4b2094a3.1733504533.git.u.kleine-koenig@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Uwe Kleine-König 2024-12-06 18:28:40 +01:00 • committed by Jonathan Cameron

parent 07a28874bb

commit 132d44dc69

1 changed files with 98 additions and 1 deletions

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drivers/iio/adc/ad_sigma_delta.c

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