On Friday 09 May 2014 12:01:48 Nicolas Ferre wrote: > On 08/05/2014 16:56, Arnd Bergmann : > > 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. > > Isn't it a "select" instead of "depends" that is required then? It seems I fixed the patch at some point but didn't update the message. In general, we should not mix 'depends on' and 'select' for the same symbol, since that causes extra confusion. In case of CONFIG_INPUT, almost all the users do 'depends on INPUT', with a few exceptions that seem to be done in error. Updated patch below. Arnd 8<---- >From 4679d63b24a681d9c6afcfdde266bae0f940e90b Mon Sep 17 00:00:00 2001 From: Arnd Bergmann <arnd@xxxxxxxx> Date: Wed, 9 Apr 2014 17:18:10 +0200 Subject: [PATCH] [SUBMITTED] iio:adc: at91 requires the input subsystem 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 adds a Kconfig dependency on CONFIG_INPUT, as we do for other similar drivers. Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Cc: linux-iio@xxxxxxxxxxxxxxx Cc: Josh Wu <josh.wu@xxxxxxxxx> Cc: Jonathan Cameron <jic23@xxxxxxxxxx> Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
