linux-kernel - Re: [PATCH] iio: adc: Kconfig: make AD9467 depend on ADI_AXI

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Message-ID: <20210325180716.5f966c21@jic23-huawei>
Date:   Thu, 25 Mar 2021 18:07:16 +0000
From:   Jonathan Cameron <jic23@...nel.org>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Alexandru Ardelean <aardelean@...iqon.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux@...iqon.com
Subject: Re: [PATCH] iio: adc: Kconfig: make AD9467 depend on ADI_AXI_ADC
 symbol

On Wed, 24 Mar 2021 11:45:14 -0700
Randy Dunlap <rdunlap@...radead.org> wrote:

> On 3/24/21 11:27 AM, Alexandru Ardelean wrote:
> > Because a dependency on HAS_IOMEM and OF was added for the ADI AXI ADC
> > driver, this makes the AD9467 driver have some build/dependency issues
> > when OF is disabled (typically on ACPI archs like x86).
> > 
> > This is because the selection of the AD9467 enforces the ADI_AXI_ADC symbol
> > which is blocked by the OF (and potentially HAS_IOMEM) being disabled.
> > 
> > To fix this, we make the AD9467 driver depend on the ADI_AXI_ADC symbol.
> > The AD9467 driver cannot operate on it's own. It requires the ADI AXI ADC
> > driver to stream data (or some similar IIO interface).
> > 
> > So, the fix here is to make the AD9467 symbol depend on the ADI_AXI_ADC
> > symbol. At some point this could become it's own subgroup of high-speed
> > ADCs.
> > 
> > Fixes: be24c65e9fa24 ("iio: adc: adi-axi-adc: add proper Kconfig dependencies")
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>  
> 
> Acked-by: Randy Dunlap <rdunlap@...radead.org>

Applied to the fixes-togreg branch of iio.git.

I'll do a pull request to Greg sometime in next few days for that
branch.


thanks,

Jonathan

> 
> Thanks.
> 
> > ---
> > 
> > Apologies for this being too late.
> > I made the patch but forgot it in a local tree.
> > 
> > Related to discussion:
> >    https://lkml.org/lkml/2021/3/18/1007
> > 
> >  drivers/iio/adc/Kconfig | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> > index e0667c4b3c08..dda0f1e37ec1 100644
> > --- a/drivers/iio/adc/Kconfig
> > +++ b/drivers/iio/adc/Kconfig
> > @@ -249,7 +249,7 @@ config AD799X
> >  config AD9467
> >  	tristate "Analog Devices AD9467 High Speed ADC driver"
> >  	depends on SPI
> > -	select ADI_AXI_ADC
> > +	depends on ADI_AXI_ADC
> >  	help
> >  	  Say yes here to build support for Analog Devices:
> >  	  * AD9467 16-Bit, 200 MSPS/250 MSPS Analog-to-Digital Converter
> >   
> 
>