[PATCH 4.16 32/47] iio: adc: select buffer for at91-sama5d2_adc

From: Greg Kroah-Hartman
Date: Mon Jun 04 2018 - 03:10:13 EST

4.16-stable review patch. If anyone has any objections, please let me know.


From: Eugen Hristev <eugen.hristev@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Cc: <Stable@xxxxxxxxxxxxxxx>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

drivers/iio/adc/Kconfig | 1 +
1 file changed, 1 insertion(+)

--- 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
Say yes here to build support for Atmel SAMA5D2 ADC which is