1 // SPDX-License-Identifier: GPL-2.0-only
29 	unsigned char century = 0;  in mc146818_get_time()
38 	 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.  in mc146818_get_time()
51 	 * by the RTC when initially set to a non-zero value.  in mc146818_get_time()
54 	time->tm_sec = CMOS_READ(RTC_SECONDS);  in mc146818_get_time()
55 	time->tm_min = CMOS_READ(RTC_MINUTES);  in mc146818_get_time()
56 	time->tm_hour = CMOS_READ(RTC_HOURS);  in mc146818_get_time()
57 	time->tm_mday = CMOS_READ(RTC_DAY_OF_MONTH);  in mc146818_get_time()
58 	time->tm_mon = CMOS_READ(RTC_MONTH);  in mc146818_get_time()
59 	time->tm_year = CMOS_READ(RTC_YEAR);  in mc146818_get_time()
73 		time->tm_sec = bcd2bin(time->tm_sec);  in mc146818_get_time()
74 		time->tm_min = bcd2bin(time->tm_min);  in mc146818_get_time()
75 		time->tm_hour = bcd2bin(time->tm_hour);  in mc146818_get_time()
76 		time->tm_mday = bcd2bin(time->tm_mday);  in mc146818_get_time()
77 		time->tm_mon = bcd2bin(time->tm_mon);  in mc146818_get_time()
78 		time->tm_year = bcd2bin(time->tm_year);  in mc146818_get_time()
83 	time->tm_year += real_year - 72;  in mc146818_get_time()
87 		time->tm_year += (century - 19) * 100;  in mc146818_get_time()
93 	if (time->tm_year <= 69)  in mc146818_get_time()
94 		time->tm_year += 100;  in mc146818_get_time()
96 	time->tm_mon--;  in mc146818_get_time()
106 	unsigned char mon, day, hrs, min, sec;  in mc146818_set_time()  local
112 	unsigned char century = 0;  in mc146818_set_time()
114 	yrs = time->tm_year;  in mc146818_set_time()
115 	mon = time->tm_mon + 1;   /* tm_mon starts at zero */  in mc146818_set_time()
116 	day = time->tm_mday;  in mc146818_set_time()
117 	hrs = time->tm_hour;  in mc146818_set_time()
118 	min = time->tm_min;  in mc146818_set_time()
119 	sec = time->tm_sec;  in mc146818_set_time()
122 		return -EINVAL;  in mc146818_set_time()
133 	 * for non-leap years, so that Feb, 29th is handled  in mc146818_set_time()
136 	if (!leap_yr && mon < 3) {  in mc146818_set_time()
137 		real_yrs--;  in mc146818_set_time()
155 		return -EINVAL;  in mc146818_set_time()
159 		yrs -= 100;  in mc146818_set_time()
167 		mon = bin2bcd(mon);  in mc146818_set_time()
181 	CMOS_WRITE(mon, RTC_MONTH);  in mc146818_set_time()
197 	return 0;  in mc146818_set_time()