Re: [PATCH] iio: adc: ad_sigma_delta: allow COMPILE_TEST in isolation

[Nuno Sá]

On Mon, Jun 08, 2026 at 12:02:54PM +0300, Radu Sabau via B4 Relay wrote:
> From: Radu Sabau <radu.sabau@xxxxxxxxxx>
> 
> AD_SIGMA_DELTA is a hidden tristate that can only be enabled by
> selecting drivers (AD7124, AD7192, etc.), all of which require SPI.
> This prevents compile-testing the library code directly with allmodconfig
> or by manually enabling it with COMPILE_TEST.
> 
> Add a prompt string guarded by "if COMPILE_TEST" so the symbol becomes
> directly selectable when COMPILE_TEST is set.
> 
> Also add an explicit "depends on SPI" since the ad_sigma_delta library
> directly calls SPI core symbols such as spi_bus_lock(), spi_bus_unlock(),
> and spi_sync_locked().
> 
> Signed-off-by: Radu Sabau <radu.sabau@xxxxxxxxxx>
> ---

LGTM,

Reviewed-by: Nuno Sá <nuno.sa@xxxxxxxxxx>

>  drivers/iio/adc/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index a9dedbb8eb46..329d1f6e5106 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -33,7 +33,8 @@ config AB8500_GPADC
>  	  and USB voltages integral to the U8500 platform.
>  
>  config AD_SIGMA_DELTA
> -	tristate
> +	tristate "Analog Devices Sigma-Delta Modulator support" if COMPILE_TEST
> +	depends on SPI
>  	select IIO_BUFFER
>  	select IIO_BUFFER_DMAENGINE
>  	select IIO_TRIGGERED_BUFFER
> 
> ---
> base-commit: 4549871118cf616eecdd2d939f78e3b9e1dddc48
> change-id: 20260608-ad_sigma_delta_spi-6063f200195b
> 
> Best regards,
> -- 
> Radu Sabau <radu.sabau@xxxxxxxxxx>
> 
>