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

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Date:   Thu, 28 Jul 2022 11:22:16 +0200
From:   Jean Delvare <jdelvare@...e.de>
To:     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: [PATCH] soc: mediatek: Let PMIC Wrapper and SCPSYS depend on OF

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@...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


-- 
Jean Delvare
SUSE L3 Support