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