This driver makes use of regmap_spi, but does not select the required
module.
Add the missing 'select REGMAP_SPI'.
Fixes: 28b4c30bfa5f ("iio: amplifiers: ada4250: add support for ADA4250")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241003-ad2s1210-select-v1-5-4019453f8c33@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
config ADA4250
tristate "Analog Devices ADA4250 Instrumentation Amplifier"
depends on SPI
+ select REGMAP_SPI
help
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SPI Amplifier's support. The driver provides direct access via