1 files changed, 61 insertions, 0 deletions
diff --git a/include/linux/rtc/m48t59.h b/include/linux/rtc/m48t59.h
new file mode 100644
index 000000000..9465d5405
--- /dev/null
+++ b/include/linux/rtc/m48t59.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * include/linux/rtc/m48t59.h
+ *
+ * Definitions for the platform data of m48t59 RTC chip driver.
+ *
+ * Copyright (c) 2007 Wind River Systems, Inc.
+ *
+ * Mark Zhan <rongkai.zhan@windriver.com>
+ */
+
+#ifndef _LINUX_RTC_M48T59_H_
+#define _LINUX_RTC_M48T59_H_
+
+/*
+ * M48T59 Register Offset
+ */
+#define M48T59_YEAR		0xf
+#define M48T59_MONTH		0xe
+#define M48T59_MDAY		0xd	/* Day of Month */
+#define M48T59_WDAY		0xc	/* Day of Week */
+#define M48T59_WDAY_CB			0x20	/* Century Bit */
+#define M48T59_WDAY_CEB			0x10	/* Century Enable Bit */
+#define M48T59_HOUR		0xb
+#define M48T59_MIN		0xa
+#define M48T59_SEC		0x9
+#define M48T59_CNTL		0x8
+#define M48T59_CNTL_READ		0x40
+#define M48T59_CNTL_WRITE		0x80
+#define M48T59_WATCHDOG		0x7
+#define M48T59_INTR		0x6
+#define M48T59_INTR_AFE			0x80	/* Alarm Interrupt Enable */
+#define M48T59_INTR_ABE			0x20
+#define M48T59_ALARM_DATE	0x5
+#define M48T59_ALARM_HOUR	0x4
+#define M48T59_ALARM_MIN	0x3
+#define M48T59_ALARM_SEC	0x2
+#define M48T59_UNUSED		0x1
+#define M48T59_FLAGS		0x0
+#define M48T59_FLAGS_WDT		0x80	/* watchdog timer expired */
+#define M48T59_FLAGS_AF			0x40	/* alarm */
+#define M48T59_FLAGS_BF			0x10	/* low battery */
+
+#define M48T59RTC_TYPE_M48T59	0 /* to keep compatibility */
+#define M48T59RTC_TYPE_M48T02	1
+#define M48T59RTC_TYPE_M48T08	2
+
+struct m48t59_plat_data {
+	/* The method to access M48T59 registers */
+	void (*write_byte)(struct device *dev, u32 ofs, u8 val);
+	unsigned char (*read_byte)(struct device *dev, u32 ofs);
+
+	int type; /* RTC model */
+
+	/* ioaddr mapped externally */
+	void __iomem *ioaddr;
+	/* offset to RTC registers, automatically set according to the type */
+	unsigned int offset;
+};
+
+#endif /* _LINUX_RTC_M48T59_H_ */