2 * include/linux/rtc/m48t59.h
4 * Definitions for the platform data of m48t59 RTC chip driver.
6 * Copyright (c) 2007 Wind River Systems, Inc.
8 * Mark Zhan <rongkai.zhan@windriver.com>
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.
15 #ifndef _LINUX_RTC_M48T59_H_
16 #define _LINUX_RTC_M48T59_H_
19 * M48T59 Register Offset
21 #define M48T59_YEAR 0x1fff
22 #define M48T59_MONTH 0x1ffe
23 #define M48T59_MDAY 0x1ffd /* Day of Month */
24 #define M48T59_WDAY 0x1ffc /* Day of Week */
25 #define M48T59_WDAY_CB 0x20 /* Century Bit */
26 #define M48T59_WDAY_CEB 0x10 /* Century Enable Bit */
27 #define M48T59_HOUR 0x1ffb
28 #define M48T59_MIN 0x1ffa
29 #define M48T59_SEC 0x1ff9
30 #define M48T59_CNTL 0x1ff8
31 #define M48T59_CNTL_READ 0x40
32 #define M48T59_CNTL_WRITE 0x80
33 #define M48T59_WATCHDOG 0x1ff7
34 #define M48T59_INTR 0x1ff6
35 #define M48T59_INTR_AFE 0x80 /* Alarm Interrupt Enable */
36 #define M48T59_INTR_ABE 0x20
37 #define M48T59_ALARM_DATE 0x1ff5
38 #define M48T59_ALARM_HOUR 0x1ff4
39 #define M48T59_ALARM_MIN 0x1ff3
40 #define M48T59_ALARM_SEC 0x1ff2
41 #define M48T59_UNUSED 0x1ff1
42 #define M48T59_FLAGS 0x1ff0
43 #define M48T59_FLAGS_WDT 0x80 /* watchdog timer expired */
44 #define M48T59_FLAGS_AF 0x40 /* alarm */
45 #define M48T59_FLAGS_BF 0x10 /* low battery */
47 #define M48T59_NVRAM_SIZE 0x1ff0
49 struct m48t59_plat_data {
50 /* The method to access M48T59 registers,
51 * NOTE: The 'ofs' should be 0x00~0x1fff
53 void (*write_byte)(struct device *dev, u32 ofs, u8 val);
54 unsigned char (*read_byte)(struct device *dev, u32 ofs);
57 #endif /* _LINUX_RTC_M48T59_H_ */