iio: adc: select buffer for at91-sama5d2_adc

We need to select the buffer code, otherwise we get build errors
with undefined functions on the trigger and buffer,
if we select just IIO and then AT91_SAMA5D2_ADC from menuconfig

This adds a Kconfig 'select' statement like other ADC
drivers have it already.

Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support")
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 72bc2b71765ae2ff4a0199e0e507c1944ba74593..47bbed3afc8f7de4d0997216f99c0c38cb16a73d 100644 (file)
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -159,6 +159,7 @@ config AT91_SAMA5D2_ADC
        depends on ARCH_AT91 || COMPILE_TEST
        depends on HAS_IOMEM
        depends on HAS_DMA
+       select IIO_BUFFER
        select IIO_TRIGGERED_BUFFER
        help
          Say yes here to build support for Atmel SAMA5D2 ADC which is