1 /*
2  * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
3  *
4  * SPDX-License-Identifier: BSD-3-Clause
5  */
6 
7 #ifndef RTC_H
8 #define RTC_H
9 
10 /* RTC registers */
11 enum {
12 	RTC_BBPU = 0xE000,
13 	RTC_IRQ_STA = 0xE002,
14 	RTC_IRQ_EN = 0xE004,
15 	RTC_CII_EN = 0xE006
16 };
17 
18 enum {
19 	RTC_OSC32CON = 0xE026,
20 	RTC_CON = 0xE03E,
21 	RTC_WRTGR = 0xE03C
22 };
23 
24 enum {
25 	RTC_PDN1 = 0xE02C,
26 	RTC_PDN2 = 0xE02E,
27 	RTC_SPAR0 = 0xE030,
28 	RTC_SPAR1 = 0xE032,
29 	RTC_PROT = 0xE036,
30 	RTC_DIFF = 0xE038,
31 	RTC_CALI = 0xE03A
32 };
33 
34 enum {
35 	RTC_PROT_UNLOCK1 = 0x586A,
36 	RTC_PROT_UNLOCK2 = 0x9136
37 };
38 
39 enum {
40 	RTC_BBPU_PWREN	= 1U << 0,
41 	RTC_BBPU_BBPU	= 1U << 2,
42 	RTC_BBPU_AUTO	= 1U << 3,
43 	RTC_BBPU_CLRPKY	= 1U << 4,
44 	RTC_BBPU_RELOAD	= 1U << 5,
45 	RTC_BBPU_CBUSY	= 1U << 6
46 };
47 
48 enum {
49 	RTC_BBPU_KEY	= 0x43 << 8
50 };
51 
52 /* external API */
53 uint16_t RTC_Read(uint32_t addr);
54 void RTC_Write(uint32_t addr, uint16_t data);
55 int32_t rtc_busy_wait(void);
56 int32_t RTC_Write_Trigger(void);
57 int32_t Writeif_unlock(void);
58 void rtc_bbpu_power_down(void);
59 
60 #endif /* RTC_H */
61