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

[Jonathan Cameron <jic23@kernel.org>]

On Mon, 8 Jun 2026 11:04:23 +0100
Nuno Sá <noname.nuno@gmail.com> wrote:

> On Mon, Jun 08, 2026 at 12:02:54PM +0300, Radu Sabau via B4 Relay wrote:
> > From: Radu Sabau <radu.sabau@analog.com>
> > 
> > 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@analog.com>
> > ---  
> 
> LGTM,
> 
> Reviewed-by: Nuno Sá <nuno.sa@analog.com>
I'm not sure I see a massive benefit in this but it's small and doesn't
affect most folk actually using IIO, so fair enough.
Applied.
> 
> >  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@analog.com>
> > 
> >   
>