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 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 */ 46 47 #define M48T59_NVRAM_SIZE 0x1ff0 48 49 struct m48t59_plat_data { 50 /* The method to access M48T59 registers, 51 * NOTE: The 'ofs' should be 0x00~0x1fff 52 */ 53 void (*write_byte)(struct device *dev, u32 ofs, u8 val); 54 unsigned char (*read_byte)(struct device *dev, u32 ofs); 55 }; 56 57 #endif /* _LINUX_RTC_M48T59_H_ */ 58