1/*
2 * include/linux/rtc/m48t59.h
3 *
4 * Definitions for the platform data of m48t59 RTC chip driver.
5 *
6 * Copyright (c) 2007 Wind River Systems, Inc.
7 *
8 * Mark Zhan <rongkai.zhan@windriver.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 */
14
15#ifndef _LINUX_RTC_M48T59_H_
16#define _LINUX_RTC_M48T59_H_
17
18/*
19 * M48T59 Register Offset
20 */
21#define M48T59_YEAR		0xf
22#define M48T59_MONTH		0xe
23#define M48T59_MDAY		0xd	/* Day of Month */
24#define M48T59_WDAY		0xc	/* Day of Week */
25#define M48T59_WDAY_CB			0x20	/* Century Bit */
26#define M48T59_WDAY_CEB			0x10	/* Century Enable Bit */
27#define M48T59_HOUR		0xb
28#define M48T59_MIN		0xa
29#define M48T59_SEC		0x9
30#define M48T59_CNTL		0x8
31#define M48T59_CNTL_READ		0x40
32#define M48T59_CNTL_WRITE		0x80
33#define M48T59_WATCHDOG		0x7
34#define M48T59_INTR		0x6
35#define M48T59_INTR_AFE			0x80	/* Alarm Interrupt Enable */
36#define M48T59_INTR_ABE			0x20
37#define M48T59_ALARM_DATE	0x5
38#define M48T59_ALARM_HOUR	0x4
39#define M48T59_ALARM_MIN	0x3
40#define M48T59_ALARM_SEC	0x2
41#define M48T59_UNUSED		0x1
42#define M48T59_FLAGS		0x0
43#define M48T59_FLAGS_WDT		0x80	/* watchdog timer expired */
44#define M48T59_FLAGS_AF			0x40	/* alarm */
45#define M48T59_FLAGS_BF			0x10	/* low battery */
46
47#define M48T59RTC_TYPE_M48T59	0 /* to keep compatibility */
48#define M48T59RTC_TYPE_M48T02	1
49#define M48T59RTC_TYPE_M48T08	2
50
51struct m48t59_plat_data {
52	/* The method to access M48T59 registers */
53	void (*write_byte)(struct device *dev, u32 ofs, u8 val);
54	unsigned char (*read_byte)(struct device *dev, u32 ofs);
55
56	int type; /* RTC model */
57
58	/* ioaddr mapped externally */
59	void __iomem *ioaddr;
60	/* offset to RTC registers, automatically set according to the type */
61	unsigned int offset;
62};
63
64#endif /* _LINUX_RTC_M48T59_H_ */
65