Subject: [PATCH 2/2] soc: mediatek: mtk-infracfg: Export symbols for DDK modules

From: Justin Yeh <[email-masked]>
Date: Fri, 29 May 2026 18:16:03 +0800

Export mtk_infracfg functions to allow other DDK modules (like
mtk-scpsys) to use bus protection APIs.

Changes:
- Add EXPORT_SYMBOL_GPL for set/clear bus_protection and init functions
- Remove static and __init qualifiers from mtk_infracfg_init
- Add mtk_infracfg_init() declaration to header
- Remove postcore_initcall, let dependent modules call init explicitly
- Add #include <linux/module.h> for export macros
- Add MODULE_LICENSE("GPL") metadata

This allows mtk-infracfg to be built as a DDK module (.ko) and its
functions to be used by other modules like mtk-scpsys for power domain
management.

Signed-off-by: Justin Yeh <[email-masked]>
---
 drivers/soc/mediatek/mtk-infracfg.c   | 9 +++++++--
 include/linux/soc/mediatek/infracfg.h | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/soc/mediatek/mtk-infracfg.c b/drivers/soc/mediatek/mtk-infracfg.c
index 2acf19676af2..8a88805468cc 100644
--- a/drivers/soc/mediatek/mtk-infracfg.c
+++ b/drivers/soc/mediatek/mtk-infracfg.c
@@ -7,6 +7,7 @@
 #include <linux/jiffies.h>
 #include <linux/regmap.h>
 #include <linux/mfd/syscon.h>
+#include <linux/module.h>
 #include <linux/soc/mediatek/infracfg.h>
 #include <asm/processor.h>
 
@@ -43,6 +44,7 @@ int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(mtk_infracfg_set_bus_protection);
 
 /**
  * mtk_infracfg_clear_bus_protection - disable bus protection
@@ -73,8 +75,9 @@ int mtk_infracfg_clear_bus_protection(struct regmap *infracfg, u32 mask,
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(mtk_infracfg_clear_bus_protection);
 
-static int __init mtk_infracfg_init(void)
+int mtk_infracfg_init(void)
 {
 	struct regmap *infracfg;
 
@@ -90,4 +93,6 @@ static int __init mtk_infracfg_init(void)
 				MT8192_INFRA_CTRL_DISABLE_MFG2ACP);
 	return 0;
 }
-postcore_initcall(mtk_infracfg_init);
+EXPORT_SYMBOL_GPL(mtk_infracfg_init);
+
+MODULE_LICENSE("GPL");
diff --git a/include/linux/soc/mediatek/infracfg.h b/include/linux/soc/mediatek/infracfg.h
index 9956e18c5ffa..847431a7b967 100644
--- a/include/linux/soc/mediatek/infracfg.h
+++ b/include/linux/soc/mediatek/infracfg.h
@@ -454,4 +454,5 @@ int mtk_infracfg_set_bus_protection(struct regmap *infracfg, u32 mask,
 		bool reg_update);
 int mtk_infracfg_clear_bus_protection(struct regmap *infracfg, u32 mask,
 		bool reg_update);
+int mtk_infracfg_init(void);
 #endif /* __SOC_MEDIATEK_INFRACFG_H */
-- 
2.45.2