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root/include/linux/rtc/m48t59.h

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/*
 * include/linux/rtc/m48t59.h
 *
 * Definitions for the platform data of m48t59 RTC chip driver.
 *
 * Copyright (c) 2007 Wind River Systems, Inc.
 *
 * Mark Zhan <rongkai.zhan@windriver.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef _LINUX_RTC_M48T59_H_
#define _LINUX_RTC_M48T59_H_

/*
 * M48T59 Register Offset
 */
#define M48T59_YEAR             0xf
#define M48T59_MONTH            0xe
#define M48T59_MDAY             0xd     /* Day of Month */
#define M48T59_WDAY             0xc     /* Day of Week */
#define M48T59_WDAY_CB                  0x20    /* Century Bit */
#define M48T59_WDAY_CEB                 0x10    /* Century Enable Bit */
#define M48T59_HOUR             0xb
#define M48T59_MIN              0xa
#define M48T59_SEC              0x9
#define M48T59_CNTL             0x8
#define M48T59_CNTL_READ                0x40
#define M48T59_CNTL_WRITE               0x80
#define M48T59_WATCHDOG         0x7
#define M48T59_INTR             0x6
#define M48T59_INTR_AFE                 0x80    /* Alarm Interrupt Enable */
#define M48T59_INTR_ABE                 0x20
#define M48T59_ALARM_DATE       0x5
#define M48T59_ALARM_HOUR       0x4
#define M48T59_ALARM_MIN        0x3
#define M48T59_ALARM_SEC        0x2
#define M48T59_UNUSED           0x1
#define M48T59_FLAGS            0x0
#define M48T59_FLAGS_WDT                0x80    /* watchdog timer expired */
#define M48T59_FLAGS_AF                 0x40    /* alarm */
#define M48T59_FLAGS_BF                 0x10    /* low battery */

#define M48T59RTC_TYPE_M48T59   0 /* to keep compatibility */
#define M48T59RTC_TYPE_M48T02   1
#define M48T59RTC_TYPE_M48T08   2

struct m48t59_plat_data {
        /* The method to access M48T59 registers */
        void (*write_byte)(struct device *dev, u32 ofs, u8 val);
        unsigned char (*read_byte)(struct device *dev, u32 ofs);

        int type; /* RTC model */

        /* ioaddr mapped externally */
        void __iomem *ioaddr;
        /* offset to RTC registers, automatically set according to the type */
        unsigned int offset;
};

#endif /* _LINUX_RTC_M48T59_H_ */

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