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 48 struct 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 /* YY digits (in RTC) are offset, i.e. year is 1900 + yy_offset + YY */ 61 int yy_offset; 62 }; 63 64 #endif /* _LINUX_RTC_M48T59_H_ */ 65