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 | |
61 | #endif /* _LINUX_RTC_M48T59_H_ */ |
62 | |