root/include/linux/rtc/m48t59.h

INCLUDED FROM

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * include/linux/rtc/m48t59.h
   4  *
   5  * Definitions for the platform data of m48t59 RTC chip driver.
   6  *
   7  * Copyright (c) 2007 Wind River Systems, Inc.
   8  *
   9  * Mark Zhan <rongkai.zhan@windriver.com>
  10  */
  11 
  12 #ifndef _LINUX_RTC_M48T59_H_
  13 #define _LINUX_RTC_M48T59_H_
  14 
  15 /*
  16  * M48T59 Register Offset
  17  */
  18 #define M48T59_YEAR             0xf
  19 #define M48T59_MONTH            0xe
  20 #define M48T59_MDAY             0xd     /* Day of Month */
  21 #define M48T59_WDAY             0xc     /* Day of Week */
  22 #define M48T59_WDAY_CB                  0x20    /* Century Bit */
  23 #define M48T59_WDAY_CEB                 0x10    /* Century Enable Bit */
  24 #define M48T59_HOUR             0xb
  25 #define M48T59_MIN              0xa
  26 #define M48T59_SEC              0x9
  27 #define M48T59_CNTL             0x8
  28 #define M48T59_CNTL_READ                0x40
  29 #define M48T59_CNTL_WRITE               0x80
  30 #define M48T59_WATCHDOG         0x7
  31 #define M48T59_INTR             0x6
  32 #define M48T59_INTR_AFE                 0x80    /* Alarm Interrupt Enable */
  33 #define M48T59_INTR_ABE                 0x20
  34 #define M48T59_ALARM_DATE       0x5
  35 #define M48T59_ALARM_HOUR       0x4
  36 #define M48T59_ALARM_MIN        0x3
  37 #define M48T59_ALARM_SEC        0x2
  38 #define M48T59_UNUSED           0x1
  39 #define M48T59_FLAGS            0x0
  40 #define M48T59_FLAGS_WDT                0x80    /* watchdog timer expired */
  41 #define M48T59_FLAGS_AF                 0x40    /* alarm */
  42 #define M48T59_FLAGS_BF                 0x10    /* low battery */
  43 
  44 #define M48T59RTC_TYPE_M48T59   0 /* to keep compatibility */
  45 #define M48T59RTC_TYPE_M48T02   1
  46 #define M48T59RTC_TYPE_M48T08   2
  47 
  48 struct m48t59_plat_data {
  49         /* The method to access M48T59 registers */
  50         void (*write_byte)(struct device *dev, u32 ofs, u8 val);
  51         unsigned char (*read_byte)(struct device *dev, u32 ofs);
  52 
  53         int type; /* RTC model */
  54 
  55         /* ioaddr mapped externally */
  56         void __iomem *ioaddr;
  57         /* offset to RTC registers, automatically set according to the type */
  58         unsigned int offset;
  59 };
  60 
  61 #endif /* _LINUX_RTC_M48T59_H_ */