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 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