include/linux/rtc/m48t59.h

   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
  51 struct 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_ */