[PATCH -next] staging: iio: Fix up the module build.

[Jonathan Cameron]

Good catch.

Thanks

Acked-by: Jonathan Cameron <jic23 at cam.ac.uk>
> Both the max1363 and lis3l02dq modules rely on IIO trigger support in
> their ring buffer implementations, which is presently a separate config
> option. In the case of IIO_RING_BUFFER=y and IIO_TRIGGER=n, we end up
> with the following:
> 
> ERROR: "iio_trigger_attach_poll_func" [drivers/staging/iio/adc/max1363.ko] undefined!
> ERROR: "iio_trigger_dettach_poll_func" [drivers/staging/iio/adc/max1363.ko] undefined!
> ERROR: "iio_trigger_unregister" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_notify_done" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_read_name" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_poll" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_attach_poll_func" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_register" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_free_trigger" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_trigger_dettach_poll_func" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> ERROR: "iio_allocate_trigger" [drivers/staging/iio/accel/lis3l02dq.ko] undefined!
> make[1]: *** [__modpost] Error 1
> make: *** [modules] Error 2
> 
> This adds an IIO_TRIGGER select for these two drivers conditional on
> IIO ring buffer support. Caught with an SH randconfig in -next.
> 
> Signed-off-by: Paul Mundt <lethal at linux-sh.org>
> 
> ---
> 
>  drivers/staging/iio/accel/Kconfig |    1 +
>  drivers/staging/iio/adc/Kconfig   |    1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/drivers/staging/iio/accel/Kconfig b/drivers/staging/iio/accel/Kconfig
> index fef3da4..c245644 100644
> --- a/drivers/staging/iio/accel/Kconfig
> +++ b/drivers/staging/iio/accel/Kconfig
> @@ -13,6 +13,7 @@ config KXSD9
>  config LIS3L02DQ
>  	tristate "ST Microelectronics LIS3L02DQ Accelerometer Driver"
>  	depends on SPI
> +	select IIO_TRIGGER if IIO_RING_BUFFER
>  	help
>  	  Say yes here to build SPI support for the ST microelectronics
>  	  accelerometer. The driver supplies direct access via sysfs files
> diff --git a/drivers/staging/iio/adc/Kconfig b/drivers/staging/iio/adc/Kconfig
> index b8c2858..a2f1626 100644
> --- a/drivers/staging/iio/adc/Kconfig
> +++ b/drivers/staging/iio/adc/Kconfig
> @@ -6,6 +6,7 @@ comment "Analog to digital convertors"
>  config MAX1363
>  	tristate "MAXIM max1363 ADC driver"
>  	depends on I2C
> +	select IIO_TRIGGER if IIO_RING_BUFFER
>  	help
>  	  Say yes here to build support for many MAXIM i2c analog to digital
>  	  convertors (ADC). (max1361, max1362, max1363, max1364, max1136,