iio: adc: select buffer for at91-sama5d2_adc

commit 76974ef9d1bf397b7bb97892a3b3bc516a1fc2c2 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 1d13bf03c75863e745623260cae2cef71f012130..369a2c632e46e6a830f67911f326fa6ff1cf9d4c 100644 (file)
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -158,6 +158,7 @@ config AT91_SAMA5D2_ADC
        tristate "Atmel AT91 SAMA5D2 ADC"
        depends on ARCH_AT91 || COMPILE_TEST
        depends on HAS_IOMEM
+       select IIO_BUFFER
        select IIO_TRIGGERED_BUFFER
        help
          Say yes here to build support for Atmel SAMA5D2 ADC which is