drivers: rtc: mc146818: Move data struct definition to a header file

Moved rtc_mc146818_data struct definition to a header file.

Signed-off-by: Anisetti Avinash Krishna <anisetti.avinash.krishna@intel.com>

Author: akanisetti

drivers/rtc/rtc_mc146818.c

@@ -15,6 +15,7 @@
 #include <zephyr/devicetree.h>
 #include <zephyr/drivers/rtc.h>
 #include <zephyr/sys/sys_io.h>
+#include <zephyr/drivers/rtc/mc146818.h>
 
 #define RTC_STD_INDEX (DT_INST_REG_ADDR_BY_IDX(0, 0))
 #define RTC_STD_TARGET (DT_INST_REG_ADDR_BY_IDX(0, 1))
@@ -118,15 +119,6 @@
 #define RTC_IN_CLK_DIV_BITS_1048576 (1 << 4)
 #define RTC_IN_CLK_DIV_BITS_32768   (2 << 4)
 
-struct rtc_mc146818_data {
-	struct k_spinlock lock;
-	bool alarm_pending;
-	rtc_alarm_callback cb;
-	void *cb_data;
-	rtc_update_callback update_cb;
-	void *update_cb_data;
-};
-
 static uint8_t rtc_read(int reg)
 {
 	uint8_t value;

include/zephyr/drivers/rtc/mc146818.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2025 Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_INCLUDE_DRIVERS_RTC_MC146818_H_
+#define ZEPHYR_INCLUDE_DRIVERS_RTC_MC146818_H_
+
+#include <zephyr/drivers/rtc.h>
+
+struct rtc_mc146818_data {
+	struct k_spinlock lock;
+	bool alarm_pending;
+	rtc_alarm_callback cb;
+	void *cb_data;
+	rtc_update_callback update_cb;
+	void *update_cb_data;
+};
+
+#endif /* ZEPHYR_INCLUDE_DRIVERS_RTC_MC146818_H_ */