94fe7424a4
Add support for two compatible RTC: - M48T08 which does not have alarm part, - M48T08 which does not have alarm part and has only 2KB of NVRAM These types covers all Mostek's RTC used in Sun UltraSparc workstations. Tested on Sun Ultra60 with M48T59 RTC. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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* include/linux/rtc/m48t59.h
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*
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* Definitions for the platform data of m48t59 RTC chip driver.
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*
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* Copyright (c) 2007 Wind River Systems, Inc.
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*
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* Mark Zhan <rongkai.zhan@windriver.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _LINUX_RTC_M48T59_H_
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#define _LINUX_RTC_M48T59_H_
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/*
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* M48T59 Register Offset
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*/
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#define M48T59_YEAR 0xf
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#define M48T59_MONTH 0xe
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#define M48T59_MDAY 0xd /* Day of Month */
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#define M48T59_WDAY 0xc /* Day of Week */
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#define M48T59_WDAY_CB 0x20 /* Century Bit */
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#define M48T59_WDAY_CEB 0x10 /* Century Enable Bit */
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#define M48T59_HOUR 0xb
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#define M48T59_MIN 0xa
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#define M48T59_SEC 0x9
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#define M48T59_CNTL 0x8
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#define M48T59_CNTL_READ 0x40
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#define M48T59_CNTL_WRITE 0x80
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#define M48T59_WATCHDOG 0x7
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#define M48T59_INTR 0x6
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#define M48T59_INTR_AFE 0x80 /* Alarm Interrupt Enable */
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#define M48T59_INTR_ABE 0x20
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#define M48T59_ALARM_DATE 0x5
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#define M48T59_ALARM_HOUR 0x4
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#define M48T59_ALARM_MIN 0x3
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#define M48T59_ALARM_SEC 0x2
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#define M48T59_UNUSED 0x1
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#define M48T59_FLAGS 0x0
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#define M48T59_FLAGS_WDT 0x80 /* watchdog timer expired */
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#define M48T59_FLAGS_AF 0x40 /* alarm */
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#define M48T59_FLAGS_BF 0x10 /* low battery */
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#define M48T59RTC_TYPE_M48T59 0 /* to keep compatibility */
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#define M48T59RTC_TYPE_M48T02 1
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#define M48T59RTC_TYPE_M48T08 2
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struct m48t59_plat_data {
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/* The method to access M48T59 registers */
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void (*write_byte)(struct device *dev, u32 ofs, u8 val);
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unsigned char (*read_byte)(struct device *dev, u32 ofs);
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int type; /* RTC model */
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/* offset to RTC registers, automatically set according to the type */
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unsigned int offset;
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};
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#endif /* _LINUX_RTC_M48T59_H_ */
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