62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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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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#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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/* ioaddr mapped externally */
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void __iomem *ioaddr;
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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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