1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/rtc/rtc-rx4581.c
7  * drivers/rtc/rtc-max6902.c
15  * drivers/rtc/rtc-rx8581.c
22  * Based on: rtc-pcf8563.c (An I2C driver for the Philips PCF8563 RTC)
23  * Copyright 2005-06 Tower Technologies
92  * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
102 	 * time and date then re-read the "update flag". If the update flag  in rx4581_get_datetime()
109 		return -EIO;  in rx4581_get_datetime()
120 				return -EIO;  in rx4581_get_datetime()
129 			return -EIO;  in rx4581_get_datetime()
136 			return -EIO;  in rx4581_get_datetime()
150 	tm->tm_sec = bcd2bin(date[RX4581_REG_SC] & 0x7F);  in rx4581_get_datetime()
151 	tm->tm_min = bcd2bin(date[RX4581_REG_MN] & 0x7F);  in rx4581_get_datetime()
152 	tm->tm_hour = bcd2bin(date[RX4581_REG_HR] & 0x3F); /* rtc hr 0-23 */  in rx4581_get_datetime()
153 	tm->tm_wday = ilog2(date[RX4581_REG_DW] & 0x7F);  in rx4581_get_datetime()
154 	tm->tm_mday = bcd2bin(date[RX4581_REG_DM] & 0x3F);  in rx4581_get_datetime()
155 	tm->tm_mon = bcd2bin(date[RX4581_REG_MO] & 0x1F) - 1; /* rtc mn 1-12 */  in rx4581_get_datetime()
156 	tm->tm_year = bcd2bin(date[RX4581_REG_YR]);  in rx4581_get_datetime()
157 	if (tm->tm_year < 70)  in rx4581_get_datetime()
158 		tm->tm_year += 100;	/* assume we are in 1970...2069 */  in rx4581_get_datetime()
161 	dev_dbg(dev, "%s: tm is secs=%d, mins=%d, hours=%d, "  in rx4581_get_datetime()
164 		tm->tm_sec, tm->tm_min, tm->tm_hour,  in rx4581_get_datetime()
165 		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);  in rx4581_get_datetime()
176 	dev_dbg(dev, "%s: secs=%d, mins=%d, hours=%d, "  in rx4581_set_datetime()
179 		tm->tm_sec, tm->tm_min, tm->tm_hour,  in rx4581_set_datetime()
180 		tm->tm_mday, tm->tm_mon, tm->tm_year, tm->tm_wday);  in rx4581_set_datetime()
183 	/* hours, minutes and seconds */  in rx4581_set_datetime()
184 	buf[RX4581_REG_SC+1] = bin2bcd(tm->tm_sec);  in rx4581_set_datetime()
185 	buf[RX4581_REG_MN+1] = bin2bcd(tm->tm_min);  in rx4581_set_datetime()
186 	buf[RX4581_REG_HR+1] = bin2bcd(tm->tm_hour);  in rx4581_set_datetime()
188 	buf[RX4581_REG_DM+1] = bin2bcd(tm->tm_mday);  in rx4581_set_datetime()
190 	/* month, 1 - 12 */  in rx4581_set_datetime()
191 	buf[RX4581_REG_MO+1] = bin2bcd(tm->tm_mon + 1);  in rx4581_set_datetime()
194 	buf[RX4581_REG_YR+1] = bin2bcd(tm->tm_year % 100);  in rx4581_set_datetime()
195 	buf[RX4581_REG_DW+1] = (0x1 << tm->tm_wday);  in rx4581_set_datetime()
201 		return -EIO;  in rx4581_set_datetime()
208 		return -EIO;  in rx4581_set_datetime()
215 		return -EIO;  in rx4581_set_datetime()
222 		return -EIO;  in rx4581_set_datetime()
229 		return -EIO;  in rx4581_set_datetime()
236 		return -EIO;  in rx4581_set_datetime()
243 		return -EIO;  in rx4581_set_datetime()
260 	res = rx4581_get_reg(&spi->dev, RX4581_REG_SC, &tmp);  in rx4581_probe()
264 	rtc = devm_rtc_device_register(&spi->dev, "rx4581",  in rx4581_probe()
281 		.name	= "rtc-rx4581",
292 MODULE_ALIAS("spi:rtc-rx4581");