linux-kernel - Re: [PATCH] soc: mediatek: Let PMIC Wrapper and SCPSYS depend on OF

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Message-ID: <98eccbdd-3446-f44d-9278-79a4a60c1c18@collabora.com>
Date:   Thu, 28 Jul 2022 12:51:44 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Jean Delvare <jdelvare@...e.de>,
        linux-mediatek@...ts.infradead.org,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Sean Wang <sean.wang@...iatek.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Chenglin Xu <chenglin.xu@...iatek.com>
Subject: Re: [PATCH] soc: mediatek: Let PMIC Wrapper and SCPSYS depend on OF

Il 28/07/22 11:22, Jean Delvare ha scritto:
> With the following configuration options:
> CONFIG_OF is not set
> CONFIG_MTK_PMIC_WRAP=y
> CONFIG_MTK_SCPSYS=y
> we get the following build warnings:
> 
>    CC      drivers/soc/mediatek/mtk-pmic-wrap.o
> drivers/soc/mediatek/mtk-pmic-wrap.c:2138:34: warning: ‘of_pwrap_match_tbl’ defined but not used [-Wunused-const-variable=]
> drivers/soc/mediatek/mtk-pmic-wrap.c:1953:34: warning: ‘of_slave_match_tbl’ defined but not used [-Wunused-const-variable=]
>    CC      drivers/soc/mediatek/mtk-scpsys.o
> drivers/soc/mediatek/mtk-scpsys.c:1084:34: warning: ‘of_scpsys_match_tbl’ defined but not used [-Wunused-const-variable=]
> 
> Looking at the code, both drivers can only bind to OF-defined device
> nodes, so these drivers are useless without OF and should therefore
> depend on it.
> 

Hello Jean,

I would prefer that you solve this warning by removing of_match_ptr() from both
drivers instead.

Regards,
Angelo

> Developers or QA teams who wish to test-build the code can still do
> so by enabling CONFIG_OF, which is available on all architectures and
> has no dependencies.
> 
> Signed-off-by: Jean Delvare <jdelvare@...e.de>
> Reported-by: kernel test robot <lkp@...el.com>
> Link: https://lore.kernel.org/all/202207240252.ZY5hSCNB-lkp@intel.com/
> Cc: Matthias Brugger <matthias.bgg@...il.com>
> Cc: Chenglin Xu <chenglin.xu@...iatek.com>
> ---
>   drivers/soc/mediatek/Kconfig |    2 ++
>   1 file changed, 2 insertions(+)
> 
> --- linux-5.18.orig/drivers/soc/mediatek/Kconfig	2022-05-22 21:52:31.000000000 +0200
> +++ linux-5.18/drivers/soc/mediatek/Kconfig	2022-07-28 10:59:55.025131145 +0200
> @@ -37,6 +37,7 @@ config MTK_INFRACFG
>   config MTK_PMIC_WRAP
>   	tristate "MediaTek PMIC Wrapper Support"
>   	depends on RESET_CONTROLLER
> +	depends on OF
>   	select REGMAP
>   	help
>   	  Say yes here to add support for MediaTek PMIC Wrapper found
> @@ -46,6 +47,7 @@ config MTK_PMIC_WRAP
>   config MTK_SCPSYS
>   	bool "MediaTek SCPSYS Support"
>   	default ARCH_MEDIATEK
> +	depends on OF
>   	select REGMAP
>   	select MTK_INFRACFG
>   	select PM_GENERIC_DOMAINS if PM
> 


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