iio: adc: stm32-dfsdm: fix unmet direct dependencies detected

This fixes unmet direct dependencies seen when CONFIG_STM32_DFSDM_ADC
is selected:

WARNING: unmet direct dependencies detected for IIO_BUFFER_HW_CONSUMER
  Depends on [n]: IIO [=y] && IIO_BUFFER [=n]
  Selected by [y]:
  - STM32_DFSDM_ADC [=y] && IIO [=y] && (ARCH_STM32 [=y] && OF [=y] ||
    COMPILE_TEST [=n])

Fixes: e2e6771c6462 ("IIO: ADC: add STM32 DFSDM sigma delta ADC support")

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index e3e0684..2896509 100644 (file)
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -821,6 +821,7 @@ config STM32_DFSDM_ADC
        depends on (ARCH_STM32 && OF) || COMPILE_TEST
        select STM32_DFSDM_CORE
        select REGMAP_MMIO
+       select IIO_BUFFER
        select IIO_BUFFER_HW_CONSUMER
        help
          Select this option to support ADCSigma delta modulator for