iio: adc: stm32-adc: skip adc-diff-channels setup if none is present

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commit 9c0d6ccd7d upstream.

If no adc differential channels are defined driver will fail with EINVAL:
stm32-adc: probe of 48003000.adc:adc@0 failed with error -22

Fix this by skipping the initialization if no channels are defined.

This applies only to the legacy way of initializing adc channels.

Fixes: d7705f3544 ("iio: adc: stm32-adc: convert to device properties")
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
Link: https://lore.kernel.org/r/20230503162029.3654093-1-sean@geanix.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sean Nyekjaer 2023-05-03 18:20:28 +02:00 • committed by Greg Kroah-Hartman

parent 735d033bed

commit f453753900

1 changed files with 9 additions and 10 deletions

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drivers/iio/adc/stm32-adc.c

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