]>
git.ipfire.org Git - people/ms/u-boot.git/blob - drivers/rtc/ftrtc010.c
2 * Faraday FTRTC010 Real Time Clock
4 * (C) Copyright 2009 Faraday Technology
5 * Po-Yu Chuang <ratbert@faraday-tech.com>
7 * SPDX-License-Identifier: GPL-2.0+
16 unsigned int sec
; /* 0x00 */
17 unsigned int min
; /* 0x04 */
18 unsigned int hour
; /* 0x08 */
19 unsigned int day
; /* 0x0c */
20 unsigned int alarm_sec
; /* 0x10 */
21 unsigned int alarm_min
; /* 0x14 */
22 unsigned int alarm_hour
; /* 0x18 */
23 unsigned int record
; /* 0x1c */
24 unsigned int cr
; /* 0x20 */
25 unsigned int wsec
; /* 0x24 */
26 unsigned int wmin
; /* 0x28 */
27 unsigned int whour
; /* 0x2c */
28 unsigned int wday
; /* 0x30 */
29 unsigned int intr
; /* 0x34 */
30 unsigned int div
; /* 0x38 */
31 unsigned int rev
; /* 0x3c */
35 * RTC Control Register
37 #define FTRTC010_CR_ENABLE (1 << 0)
38 #define FTRTC010_CR_INTERRUPT_SEC (1 << 1) /* per second irq */
39 #define FTRTC010_CR_INTERRUPT_MIN (1 << 2) /* per minute irq */
40 #define FTRTC010_CR_INTERRUPT_HR (1 << 3) /* per hour irq */
41 #define FTRTC010_CR_INTERRUPT_DAY (1 << 4) /* per day irq */
43 static struct ftrtc010
*rtc
= (struct ftrtc010
*)CONFIG_FTRTC010_BASE
;
45 static void ftrtc010_enable(void)
47 writel(FTRTC010_CR_ENABLE
, &rtc
->cr
);
51 * return current time in seconds
53 static unsigned long ftrtc010_time(void)
59 unsigned long second2
;
62 second
= readl(&rtc
->sec
);
63 day
= readl(&rtc
->day
);
64 hour
= readl(&rtc
->hour
);
65 minute
= readl(&rtc
->min
);
66 second2
= readl(&rtc
->sec
);
67 } while (second
!= second2
);
69 return day
* 24 * 60 * 60 + hour
* 60 * 60 + minute
* 60 + second
;
73 * Get the current time from the RTC
76 int rtc_get(struct rtc_time
*tmp
)
80 debug("%s(): record register: %x\n",
81 __func__
, readl(&rtc
->record
));
83 #ifdef CONFIG_FTRTC010_PCLK
84 now
= (ftrtc010_time() + readl(&rtc
->record
)) / RTC_DIV_COUNT
;
85 #else /* CONFIG_FTRTC010_EXTCLK */
86 now
= ftrtc010_time() + readl(&rtc
->record
);
97 int rtc_set(struct rtc_time
*tmp
)
102 debug("%s(): DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
104 tmp
->tm_year
, tmp
->tm_mon
, tmp
->tm_mday
, tmp
->tm_wday
,
105 tmp
->tm_hour
, tmp
->tm_min
, tmp
->tm_sec
);
107 new = rtc_mktime(tmp
);
109 now
= ftrtc010_time();
111 debug("%s(): write %lx to record register\n", __func__
, new - now
);
113 writel(new - now
, &rtc
->record
);
120 debug("%s()\n", __func__
);