linux-kernel - Re: [PATCH v2] soc: mediatek: place Kconfig for all SoC drivers under menu

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Date:   Thu, 5 Oct 2017 10:52:53 +0200
From:   Jean Delvare <jdelvare@...e.de>
To:     <sean.wang@...iatek.com>
Cc:     <matthias.bgg@...il.com>, <linux-mediatek@...ts.infradead.org>,
        <arnd@...db.de>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] soc: mediatek: place Kconfig for all SoC drivers
 under menu

Hi Sean,

On Thu, 5 Oct 2017 11:17:49 +0800, sean.wang@...iatek.com wrote:
> From: Sean Wang <sean.wang@...iatek.com>
> 
> Add cleanup for placing all Kconfig for all MediaTek SoC drivers under
> the independent menu as other SoCs vendor usually did. Since the menu
> would be shown depending on "ARCH_MEDIATEK || COMPILE_TEST" selected and
> MTK_PMIC_WRAP is still safe compiling with the case of "COMPILE_TEST"
> only, the superfluous dependency for those items under the menu also is
> also being removed for the sake of simplicity.
> 
> Signed-off-by: Sean Wang <sean.wang@...iatek.com>
> ---
>  drivers/soc/mediatek/Kconfig | 8 +++++---
>  1 file changed, 5 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig
> index 609bb34..a7d0667 100644
> --- a/drivers/soc/mediatek/Kconfig
> +++ b/drivers/soc/mediatek/Kconfig
> @@ -1,9 +1,11 @@
>  #
>  # MediaTek SoC drivers
>  #
> +menu "MediaTek SoC drivers"
> +	depends on ARCH_MEDIATEK || COMPILE_TEST
> +
>  config MTK_INFRACFG
>  	bool "MediaTek INFRACFG Support"
> -	depends on ARCH_MEDIATEK || COMPILE_TEST
>  	select REGMAP
>  	help
>  	  Say yes here to add support for the MediaTek INFRACFG controller. The
> @@ -12,7 +14,6 @@ config MTK_INFRACFG
>  
>  config MTK_PMIC_WRAP
>  	tristate "MediaTek PMIC Wrapper Support"
> -	depends on ARCH_MEDIATEK
>  	depends on RESET_CONTROLLER
>  	select REGMAP
>  	help
> @@ -22,7 +23,6 @@ config MTK_PMIC_WRAP
>  
>  config MTK_SCPSYS
>  	bool "MediaTek SCPSYS Support"
> -	depends on ARCH_MEDIATEK || COMPILE_TEST
>  	default ARCH_MEDIATEK
>  	select REGMAP
>  	select MTK_INFRACFG
> @@ -30,3 +30,5 @@ config MTK_SCPSYS
>  	help
>  	  Say yes here to add support for the MediaTek SCPSYS power domain
>  	  driver.
> +
> +endmenu

While trying to test this, I found that I am not able to test-compile
these drivers. The problem is in drivers/soc/Makefile:

obj-$(CONFIG_ARCH_MEDIATEK)     += mediatek/

So while Kconfig lets me select the drivers when COMPILE_TEST is
enabled, the build system itself ignores the directory in which these
drivers reside and they aren't built.

If you really want your drivers to be test-compilable then you must
change the above to:

obj-y				+= mediatek/

I'll send a patch.

Your patch itself looks good to me.

Reviewed-by: Jean Delvare <jdelvare@...e.de>

-- 
Jean Delvare
SUSE L3 Support