This driver makes use of triggered buffers, but does not select the required modules. Add the missing 'select IIO_BUFFER' and 'select IIO_TRIGGERED_BUFFER'. Fixes: d1efcf8871db ("iio: adc: ad7944: add driver for AD7944/AD7985/AD7986") Signed-off-by: Javier Carrasco <javier.carrasco.cruz@xxxxxxxxx> --- drivers/iio/adc/Kconfig | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 97ece1a4b7e3..6790e62700fe 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -328,6 +328,8 @@ config AD7923 config AD7944 tristate "Analog Devices AD7944 and similar ADCs driver" depends on SPI + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices AD7944, AD7985, AD7986 ADCs. -- 2.43.0