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Message-ID: <536E02AD.9000201@kernel.org> Date: Sat, 10 May 2014 11:42:53 +0100 From: Jonathan Cameron <jic23@...nel.org> To: Nicolas Ferre <nicolas.ferre@...el.com>, Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org, linux-iio@...r.kernel.org CC: Josh Wu <josh.wu@...el.com>, Maxime Ripard <maxime.ripard@...e-electrons.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 2/2] iio:adc: at91 requires the input subsystem On 09/05/14 13:57, Nicolas Ferre wrote: > On 09/05/2014 13:43, Arnd Bergmann : >> 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. > > Ok, that makes sense. > > >> Updated patch below. > > Thanks Arnd. > >> Arnd >> >> 8<---- >> >> >From 4679d63b24a681d9c6afcfdde266bae0f940e90b Mon Sep 17 00:00:00 2001 >> From: Arnd Bergmann <arnd@...db.de> >> 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@...db.de> >> Cc: linux-iio@...r.kernel.org >> Cc: Josh Wu <josh.wu@...el.com> >> Cc: Jonathan Cameron <jic23@...nel.org> >> Cc: Maxime Ripard <maxime.ripard@...e-electrons.com> > > > Acked-by: Nicolas Ferre <nicolas.ferre@...el.com> > Applied to the togreg branch of iio.git. Thanks, Jonathan > Bye, > >> >> 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-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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