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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* 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>
*/
#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_ */