mfd: sec: Move private internal API to internal header

sec_irq_init() is an internal API for the core driver, and doesn't
belong into the public header.

Due to an upcoming split of the driver into a core and i2c driver,
we'll also be adding more internal APIs, which again shouldn't be in
the public header.

Move it into a new internal include.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: André Draszik <andre.draszik@linaro.org>
Link: https://lore.kernel.org/r/20250409-s2mpg10-v4-7-d66d5f39b6bf@linaro.org
Signed-off-by: Lee Jones <lee@kernel.org>

Author: andred

MAINTAINERS

@@ -21457,7 +21457,7 @@ F:	Documentation/devicetree/bindings/mfd/samsung,s5m*.yaml
 F:	Documentation/devicetree/bindings/regulator/samsung,s2m*.yaml
 F:	Documentation/devicetree/bindings/regulator/samsung,s5m*.yaml
 F:	drivers/clk/clk-s2mps11.c
-F:	drivers/mfd/sec*.c
+F:	drivers/mfd/sec*.[ch]
 F:	drivers/regulator/s2m*.c
 F:	drivers/regulator/s5m*.c
 F:	drivers/rtc/rtc-s5m.c

drivers/mfd/sec-core.c

@@ -23,6 +23,7 @@
 #include <linux/pm.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
+#include "sec-core.h"
 
 static const struct mfd_cell s5m8767_devs[] = {
 	{ .name = "s5m8767-pmic", },

drivers/mfd/sec-core.h

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright 2012 Samsung Electronics Co., Ltd
+ *                http://www.samsung.com
+ * Copyright 2025 Linaro Ltd.
+ *
+ * Samsung SxM core driver internal data
+ */
+
+#ifndef __SEC_CORE_INT_H
+#define __SEC_CORE_INT_H
+
+int sec_irq_init(struct sec_pmic_dev *sec_pmic);
+
+#endif /* __SEC_CORE_INT_H */

drivers/mfd/sec-irq.c

@@ -18,6 +18,7 @@
 #include <linux/mfd/samsung/s5m8767.h>
 #include <linux/module.h>
 #include <linux/regmap.h>
+#include "sec-core.h"
 
 static const struct regmap_irq s2mps11_irqs[] = {
 	[S2MPS11_IRQ_PWRONF] = {

include/linux/mfd/samsung/core.h

@@ -71,8 +71,6 @@ struct sec_pmic_dev {
 	struct regmap_irq_chip_data *irq_data;
 };
 
-int sec_irq_init(struct sec_pmic_dev *sec_pmic);
-
 struct sec_platform_data {
 	struct sec_regulator_data	*regulators;
 	struct sec_opmode_data		*opmode;