1 *d2912cb1SThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 2 2e774c7cSMark Zhan /* 3 2e774c7cSMark Zhan * include/linux/rtc/m48t59.h 4 2e774c7cSMark Zhan * 5 2e774c7cSMark Zhan * Definitions for the platform data of m48t59 RTC chip driver. 6 2e774c7cSMark Zhan * 7 2e774c7cSMark Zhan * Copyright (c) 2007 Wind River Systems, Inc. 8 2e774c7cSMark Zhan * 9 2e774c7cSMark Zhan * Mark Zhan <rongkai.zhan@windriver.com> 10 2e774c7cSMark Zhan */ 11 2e774c7cSMark Zhan 12 2e774c7cSMark Zhan #ifndef _LINUX_RTC_M48T59_H_ 13 2e774c7cSMark Zhan #define _LINUX_RTC_M48T59_H_ 14 2e774c7cSMark Zhan 15 2e774c7cSMark Zhan /* 16 2e774c7cSMark Zhan * M48T59 Register Offset 17 2e774c7cSMark Zhan */ 18 94fe7424SKrzysztof Helt #define M48T59_YEAR 0xf 19 94fe7424SKrzysztof Helt #define M48T59_MONTH 0xe 20 94fe7424SKrzysztof Helt #define M48T59_MDAY 0xd /* Day of Month */ 21 94fe7424SKrzysztof Helt #define M48T59_WDAY 0xc /* Day of Week */ 22 2e774c7cSMark Zhan #define M48T59_WDAY_CB 0x20 /* Century Bit */ 23 2e774c7cSMark Zhan #define M48T59_WDAY_CEB 0x10 /* Century Enable Bit */ 24 94fe7424SKrzysztof Helt #define M48T59_HOUR 0xb 25 94fe7424SKrzysztof Helt #define M48T59_MIN 0xa 26 94fe7424SKrzysztof Helt #define M48T59_SEC 0x9 27 94fe7424SKrzysztof Helt #define M48T59_CNTL 0x8 28 2e774c7cSMark Zhan #define M48T59_CNTL_READ 0x40 29 2e774c7cSMark Zhan #define M48T59_CNTL_WRITE 0x80 30 94fe7424SKrzysztof Helt #define M48T59_WATCHDOG 0x7 31 94fe7424SKrzysztof Helt #define M48T59_INTR 0x6 32 2e774c7cSMark Zhan #define M48T59_INTR_AFE 0x80 /* Alarm Interrupt Enable */ 33 2e774c7cSMark Zhan #define M48T59_INTR_ABE 0x20 34 94fe7424SKrzysztof Helt #define M48T59_ALARM_DATE 0x5 35 94fe7424SKrzysztof Helt #define M48T59_ALARM_HOUR 0x4 36 94fe7424SKrzysztof Helt #define M48T59_ALARM_MIN 0x3 37 94fe7424SKrzysztof Helt #define M48T59_ALARM_SEC 0x2 38 94fe7424SKrzysztof Helt #define M48T59_UNUSED 0x1 39 94fe7424SKrzysztof Helt #define M48T59_FLAGS 0x0 40 2e774c7cSMark Zhan #define M48T59_FLAGS_WDT 0x80 /* watchdog timer expired */ 41 2e774c7cSMark Zhan #define M48T59_FLAGS_AF 0x40 /* alarm */ 42 2e774c7cSMark Zhan #define M48T59_FLAGS_BF 0x10 /* low battery */ 43 2e774c7cSMark Zhan 44 94fe7424SKrzysztof Helt #define M48T59RTC_TYPE_M48T59 0 /* to keep compatibility */ 45 94fe7424SKrzysztof Helt #define M48T59RTC_TYPE_M48T02 1 46 94fe7424SKrzysztof Helt #define M48T59RTC_TYPE_M48T08 2 47 2e774c7cSMark Zhan 48 2e774c7cSMark Zhan struct m48t59_plat_data { 49 94fe7424SKrzysztof Helt /* The method to access M48T59 registers */ 50 2e774c7cSMark Zhan void (*write_byte)(struct device *dev, u32 ofs, u8 val); 51 2e774c7cSMark Zhan unsigned char (*read_byte)(struct device *dev, u32 ofs); 52 94fe7424SKrzysztof Helt 53 94fe7424SKrzysztof Helt int type; /* RTC model */ 54 94fe7424SKrzysztof Helt 55 64151ad5SKrzysztof Helt /* ioaddr mapped externally */ 56 64151ad5SKrzysztof Helt void __iomem *ioaddr; 57 94fe7424SKrzysztof Helt /* offset to RTC registers, automatically set according to the type */ 58 94fe7424SKrzysztof Helt unsigned int offset; 59 2e774c7cSMark Zhan }; 60 2e774c7cSMark Zhan 61 2e774c7cSMark Zhan #endif /* _LINUX_RTC_M48T59_H_ */ 62