[PATCH] soc: mediatek: Let PMIC Wrapper and SCPSYS depend on OF

[PATCH] soc: mediatek: Let PMIC Wrapper and SCPSYS depend on OF

[Jean Delvare]

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.

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@suse.de>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/all/202207240252.ZY5hSCNB-lkp@intel.com/
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Chenglin Xu <chenglin.xu@mediatek.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


-- 
Jean Delvare
SUSE L3 Support

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

[AngeloGioacchino Del Regno]

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@suse.de>
> Reported-by: kernel test robot <lkp@intel.com>
> Link: https://lore.kernel.org/all/202207240252.ZY5hSCNB-lkp@intel.com/
> Cc: Matthias Brugger <matthias.bgg@gmail.com>
> Cc: Chenglin Xu <chenglin.xu@mediatek.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
> 


-- 

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

[Jean Delvare]

Hi Angelo,

On Thu, 28 Jul 2022 12:51:44 +0200, AngeloGioacchino Del Regno wrote:
> 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.
> 
> I would prefer that you solve this warning by removing of_match_ptr() from both
> drivers instead.

Actually we could do both. Once the drivers depend on OF,
of_match_ptr(_ptr) will always resolve to (_ptr) so we can indeed
save the preprocessor some work.

-- 
Jean Delvare
SUSE L3 Support