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 48struct 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_ */ 62