linux-kernel - Re: [PATCH v2] media: platform: Add missing MFD_SYSCON dependency on HAS

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Date:	Fri, 04 Mar 2016 12:02:28 +0100
From:	Sylwester Nawrocki <s.nawrocki@...sung.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	linux-arm-kernel@...ts.infradead.org
Cc:	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	linux-media@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH v2] media: platform: Add missing MFD_SYSCON dependency on
 HAS_IOMEM

On 03/04/2016 02:02 AM, Krzysztof Kozlowski wrote:
> The MFD_SYSCON depends on HAS_IOMEM so when selecting 
> it avoid unmet direct dependencies.

> diff --git a/drivers/media/platform/exynos4-is/Kconfig 
> b/drivers/media/platform/exynos4-is/Kconfig
> index 57d42c6172c5..c4317b99d257 100644
> --- a/drivers/media/platform/exynos4-is/Kconfig
> +++ b/drivers/media/platform/exynos4-is/Kconfig
> @@ -17,6 +17,7 @@ config VIDEO_S5P_FIMC
>  	tristate "S5P/EXYNOS4 FIMC/CAMIF camera interface driver"
>  	depends on I2C
>  	depends on HAS_DMA
> +	depends on HAS_IOMEM	# For MFD_SYSCON
>  	select VIDEOBUF2_DMA_CONTIG
>  	select V4L2_MEM2MEM_DEV
>  	select MFD_SYSCON

While we are already at it, shouldn't "depends on HAS_IOMEM"
be instead added at the top level entry in this Kconfig file,
i.e. "config VIDEO_SAMSUNG_EXYNOS4_IS" ? For things like
devm_ioremap_resource() depending on HAS_IOMEM and used in all
the sub-drivers, enabled by VIDEO_SAMSUNG_EXYNOS4_IS?

-- 
Thanks,
Sylwester