Building the at91 adc driver with CONFIG_INPUT disabled results in this
build error:

ERROR: "input_event" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_unregister_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_free_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_register_device" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_set_abs_params" [drivers/iio/adc/at91_adc.ko] undefined!
ERROR: "input_allocate_device" [drivers/iio/adc/at91_adc.ko] undefined!

To make sure we can build random configurations, this turns on CONFIG_INPUT
whenever CONFIG_AT91_ADC is enabled.

Signed-off-by: Arnd Bergmann <[email protected]>
Cc: [email protected]
Cc: Josh Wu <[email protected]>
Cc: Jonathan Cameron <[email protected]>
Cc: Maxime Ripard <[email protected]>
---
 drivers/iio/adc/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 90f596d..a80d236 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -110,6 +110,7 @@ config AD799X
 config AT91_ADC
        tristate "Atmel AT91 ADC"
        depends on ARCH_AT91
+       depends on INPUT
        select IIO_BUFFER
        select IIO_TRIGGERED_BUFFER
        select SYSFS
-- 
1.8.3.2

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