1 // SPDX-License-Identifier: GPL-2.0
3  * linux/arch/sh/boards/sh03/rtc.c -- CTP/PCI-SH03 on-chip RTC support
19 #define RTC_BASE	0xb0000000
20 #define RTC_SEC1	(RTC_BASE + 0)
43 	unsigned int year, mon, day, hour, min, sec;  in sh03_rtc_gettimeofday()  local
48 		sec  = (__raw_readb(RTC_SEC1) & 0xf) + (__raw_readb(RTC_SEC10) & 0x7) * 10;  in sh03_rtc_gettimeofday()
49 		min  = (__raw_readb(RTC_MIN1) & 0xf) + (__raw_readb(RTC_MIN10) & 0xf) * 10;  in sh03_rtc_gettimeofday()
50 		hour = (__raw_readb(RTC_HOU1) & 0xf) + (__raw_readb(RTC_HOU10) & 0xf) * 10;  in sh03_rtc_gettimeofday()
51 		day  = (__raw_readb(RTC_DAY1) & 0xf) + (__raw_readb(RTC_DAY10) & 0xf) * 10;  in sh03_rtc_gettimeofday()
52 		mon  = (__raw_readb(RTC_MON1) & 0xf) + (__raw_readb(RTC_MON10) & 0xf) * 10;  in sh03_rtc_gettimeofday()
53 		year = (__raw_readb(RTC_YEA1) & 0xf) + (__raw_readb(RTC_YEA10) & 0xf) * 10  in sh03_rtc_gettimeofday()
54 		     + (__raw_readb(RTC_YEA100 ) & 0xf) * 100  in sh03_rtc_gettimeofday()
55 		     + (__raw_readb(RTC_YEA1000) & 0xf) * 1000;  in sh03_rtc_gettimeofday()
56 	} while (sec != (__raw_readb(RTC_SEC1) & 0xf) + (__raw_readb(RTC_SEC10) & 0x7) * 10);  in sh03_rtc_gettimeofday()
57 	if (year == 0 || mon < 1 || mon > 12 || day > 31 || day < 1 ||  in sh03_rtc_gettimeofday()
60 		       "SH-03 RTC: invalid value, resetting to 1 Jan 2000\n");  in sh03_rtc_gettimeofday()
61 		printk("year=%d, mon=%d, day=%d, hour=%d, min=%d, sec=%d\n",  in sh03_rtc_gettimeofday()
62 		       year, mon, day, hour, min, sec);  in sh03_rtc_gettimeofday()
64 		__raw_writeb(0, RTC_SEC1); __raw_writeb(0, RTC_SEC10);  in sh03_rtc_gettimeofday()
65 		__raw_writeb(0, RTC_MIN1); __raw_writeb(0, RTC_MIN10);  in sh03_rtc_gettimeofday()
66 		__raw_writeb(0, RTC_HOU1); __raw_writeb(0, RTC_HOU10);  in sh03_rtc_gettimeofday()
68 		__raw_writeb(1, RTC_DAY1); __raw_writeb(0, RTC_DAY10);  in sh03_rtc_gettimeofday()
69 		__raw_writeb(1, RTC_MON1); __raw_writeb(0, RTC_MON10);  in sh03_rtc_gettimeofday()
70 		__raw_writeb(0, RTC_YEA1); __raw_writeb(0, RTC_YEA10);  in sh03_rtc_gettimeofday()
71 		__raw_writeb(0, RTC_YEA100);  in sh03_rtc_gettimeofday()
73 		__raw_writeb(0, RTC_CTL);  in sh03_rtc_gettimeofday()
79 	tm->tm_sec  = sec;  in sh03_rtc_gettimeofday()
80 	tm->tm_min  = min;  in sh03_rtc_gettimeofday()
81 	tm->tm_hour = hour;  in sh03_rtc_gettimeofday()
82 	tm->tm_mday = day;  in sh03_rtc_gettimeofday()
83 	tm->tm_mon  = mon;  in sh03_rtc_gettimeofday()
84 	tm->tm_year = year - 1900;  in sh03_rtc_gettimeofday()
86 	return 0;  in sh03_rtc_gettimeofday()
91 	int retval = 0;  in set_rtc_mmss()
97 	for (i = 0 ; i < 1000000 ; i++)	/* may take up to 1 second... */  in set_rtc_mmss()
100 	cmos_minutes = (__raw_readb(RTC_MIN1) & 0xf) + (__raw_readb(RTC_MIN10) & 0xf) * 10;  in set_rtc_mmss()
101 	real_seconds = tm->tm_sec;  in set_rtc_mmss()
102 	real_minutes = tm->tm_min;  in set_rtc_mmss()
103 	if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)  in set_rtc_mmss()
107 	if (abs(real_minutes - cmos_minutes) < 30) {  in set_rtc_mmss()
116 		retval = -EINVAL;  in set_rtc_mmss()
137 	pdev = platform_device_register_data(NULL, "rtc-generic", -1,  in sh03_time_init()