1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2014-2019 MediaTek Inc.
4  *
5  * Author: Tianping.Fang <tianping.fang@mediatek.com>
6  *        Sean Wang <sean.wang@mediatek.com>
7  */
8 
9 #ifndef _LINUX_MFD_MT6397_RTC_H_
10 #define _LINUX_MFD_MT6397_RTC_H_
11 
12 #include <linux/jiffies.h>
13 #include <linux/mutex.h>
14 #include <linux/regmap.h>
15 #include <linux/rtc.h>
16 
17 #define RTC_BBPU               0x0000
18 #define RTC_BBPU_CBUSY         BIT(6)
19 #define RTC_BBPU_KEY            (0x43 << 8)
20 
21 #define RTC_WRTGR_MT6358       0x003a
22 #define RTC_WRTGR_MT6397       0x003c
23 #define RTC_WRTGR_MT6323       RTC_WRTGR_MT6397
24 
25 #define RTC_IRQ_STA            0x0002
26 #define RTC_IRQ_STA_AL         BIT(0)
27 #define RTC_IRQ_STA_LP         BIT(3)
28 
29 #define RTC_IRQ_EN             0x0004
30 #define RTC_IRQ_EN_AL          BIT(0)
31 #define RTC_IRQ_EN_ONESHOT     BIT(2)
32 #define RTC_IRQ_EN_LP          BIT(3)
33 #define RTC_IRQ_EN_ONESHOT_AL  (RTC_IRQ_EN_ONESHOT | RTC_IRQ_EN_AL)
34 
35 #define RTC_AL_MASK            0x0008
36 #define RTC_AL_MASK_DOW                BIT(4)
37 
38 #define RTC_TC_SEC             0x000a
39 #define RTC_TC_MTH_MASK        0x000f
40 /* Min, Hour, Dom... register offset to RTC_TC_SEC */
41 #define RTC_OFFSET_SEC         0
42 #define RTC_OFFSET_MIN         1
43 #define RTC_OFFSET_HOUR                2
44 #define RTC_OFFSET_DOM         3
45 #define RTC_OFFSET_DOW         4
46 #define RTC_OFFSET_MTH         5
47 #define RTC_OFFSET_YEAR                6
48 #define RTC_OFFSET_COUNT       7
49 
50 #define RTC_AL_SEC             0x0018
51 
52 #define RTC_AL_SEC_MASK        0x003f
53 #define RTC_AL_MIN_MASK        0x003f
54 #define RTC_AL_HOU_MASK        0x001f
55 #define RTC_AL_DOM_MASK        0x001f
56 #define RTC_AL_DOW_MASK        0x0007
57 #define RTC_AL_MTH_MASK        0x000f
58 #define RTC_AL_YEA_MASK        0x007f
59 
60 #define RTC_PDN2               0x002e
61 #define RTC_PDN2_PWRON_ALARM   BIT(4)
62 
63 #define RTC_MIN_YEAR           1968
64 #define RTC_BASE_YEAR          1900
65 #define RTC_NUM_YEARS          128
66 #define RTC_MIN_YEAR_OFFSET    (RTC_MIN_YEAR - RTC_BASE_YEAR)
67 
68 #define MTK_RTC_POLL_DELAY_US  10
69 #define MTK_RTC_POLL_TIMEOUT   (jiffies_to_usecs(HZ))
70 
71 struct mtk_rtc_data {
72 	u32                     wrtgr;
73 };
74 
75 struct mt6397_rtc {
76 	struct rtc_device       *rtc_dev;
77 
78 	/* Protect register access from multiple tasks */
79 	struct mutex            lock;
80 	struct regmap           *regmap;
81 	int                     irq;
82 	u32                     addr_base;
83 	const struct mtk_rtc_data *data;
84 };
85 
86 #endif /* _LINUX_MFD_MT6397_RTC_H_ */
87