linux-kernel - Re: [PATCH] iio: adc: rockchip_saradc: Select IIO_TRIGGERED

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Date:   Sat, 29 Aug 2020 15:57:03 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Alexandru Elisei <alexandru.elisei@....com>
Cc:     linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
        knaack.h@....de, lars@...afoo.de, pmeerw@...erw.net,
        xxm@...k-chips.com
Subject: Re: [PATCH] iio: adc: rockchip_saradc: Select IIO_TRIGGERED_BUFFER

On Fri, 28 Aug 2020 18:42:42 +0100
Alexandru Elisei <alexandru.elisei@....com> wrote:

> Building the Rockchip saradc driver can trigger the following error if the
> driver is compiled into the kernel, but the IIO triggered buffer is not:
> 
> aarch64-linux-gnu-ld: drivers/iio/adc/rockchip_saradc.o: in function `rockchip_saradc_probe':
> /path/to/linux/drivers/iio/adc/rockchip_saradc.c:427: undefined reference to `devm_iio_triggered_buffer_setup'
> 
> This is because commit 4e130dc7b413 ("iio: adc: rockchip_saradc: Add
> support iio buffers") added support for industrial I/O triggered buffers,
> but didn't update Kconfig to build the required file. Fix that.
> 
> Fixes: 4e130dc7b413 ("iio: adc: rockchip_saradc: Add support iio buffers")
> Signed-off-by: Alexandru Elisei <alexandru.elisei@....com>

Sorry, I've had a patch queued to fix this for a while, but had a
vacation just after merge window occurred that delayed me sending it out.

Will send a pull sometime this weekend.

Jonathan

> ---
>  drivers/iio/adc/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 66d9cc073157..baa36a07a9cf 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -865,6 +865,7 @@ config ROCKCHIP_SARADC
>  	tristate "Rockchip SARADC driver"
>  	depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST)
>  	depends on RESET_CONTROLLER
> +	select IIO_TRIGGERED_BUFFER
>  	help
>  	  Say yes here to build support for the SARADC found in SoCs from
>  	  Rockchip.