1 // SPDX-License-Identifier: GPL-2.0-or-later
27 	return __raw_readl(&priv->rtcregs[reg]) & 0xff;  in ds1286_rtc_read()
32 	__raw_writel(data, &priv->rtcregs[reg]);  in ds1286_rtc_write()
43 	spin_lock_irqsave(&priv->lock, flags);  in ds1286_alarm_irq_enable()
50 	spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_alarm_irq_enable()
52 	return 0;  in ds1286_alarm_irq_enable()
66 		spin_lock_irqsave(&priv->lock, flags);  in ds1286_ioctl()
70 		spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_ioctl()
74 		spin_lock_irqsave(&priv->lock, flags);  in ds1286_ioctl()
78 		spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_ioctl()
81 		return -ENOIOCTLCMD;  in ds1286_ioctl()
83 	return 0;  in ds1286_ioctl()
105 	amode = ((ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x80) >> 5) |  in ds1286_proc()
106 		((ds1286_rtc_read(priv, RTC_HOURS_ALARM) & 0x80) >> 6) |  in ds1286_proc()
107 		((ds1286_rtc_read(priv, RTC_DAY_ALARM) & 0x80) >> 7);  in ds1286_proc()
118 	case 0:  in ds1286_proc()
143 	return 0;  in ds1286_proc()
160 	 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.  in ds1286_read_time()
175 	 * by the RTC when initially set to a non-zero value.  in ds1286_read_time()
177 	spin_lock_irqsave(&priv->lock, flags);  in ds1286_read_time()
181 	tm->tm_sec = ds1286_rtc_read(priv, RTC_SECONDS);  in ds1286_read_time()
182 	tm->tm_min = ds1286_rtc_read(priv, RTC_MINUTES);  in ds1286_read_time()
183 	tm->tm_hour = ds1286_rtc_read(priv, RTC_HOURS) & 0x3f;  in ds1286_read_time()
184 	tm->tm_mday = ds1286_rtc_read(priv, RTC_DATE);  in ds1286_read_time()
185 	tm->tm_mon = ds1286_rtc_read(priv, RTC_MONTH) & 0x1f;  in ds1286_read_time()
186 	tm->tm_year = ds1286_rtc_read(priv, RTC_YEAR);  in ds1286_read_time()
189 	spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_read_time()
191 	tm->tm_sec = bcd2bin(tm->tm_sec);  in ds1286_read_time()
192 	tm->tm_min = bcd2bin(tm->tm_min);  in ds1286_read_time()
193 	tm->tm_hour = bcd2bin(tm->tm_hour);  in ds1286_read_time()
194 	tm->tm_mday = bcd2bin(tm->tm_mday);  in ds1286_read_time()
195 	tm->tm_mon = bcd2bin(tm->tm_mon);  in ds1286_read_time()
196 	tm->tm_year = bcd2bin(tm->tm_year);  in ds1286_read_time()
202 	if (tm->tm_year < 45)  in ds1286_read_time()
203 		tm->tm_year += 30;  in ds1286_read_time()
204 	tm->tm_year += 40;  in ds1286_read_time()
205 	if (tm->tm_year < 70)  in ds1286_read_time()
206 		tm->tm_year += 100;  in ds1286_read_time()
208 	tm->tm_mon--;  in ds1286_read_time()
210 	return 0;  in ds1286_read_time()
216 	unsigned char mon, day, hrs, min, sec;  in ds1286_set_time()  local
221 	yrs = tm->tm_year + 1900;  in ds1286_set_time()
222 	mon = tm->tm_mon + 1;   /* tm_mon starts at zero */  in ds1286_set_time()
223 	day = tm->tm_mday;  in ds1286_set_time()
224 	hrs = tm->tm_hour;  in ds1286_set_time()
225 	min = tm->tm_min;  in ds1286_set_time()
226 	sec = tm->tm_sec;  in ds1286_set_time()
229 		return -EINVAL;  in ds1286_set_time()
231 	yrs -= 1940;  in ds1286_set_time()
233 		return -EINVAL;  in ds1286_set_time()
236 		yrs -= 100;  in ds1286_set_time()
242 	mon = bin2bcd(mon);  in ds1286_set_time()
245 	spin_lock_irqsave(&priv->lock, flags);  in ds1286_set_time()
250 	ds1286_rtc_write(priv, mon, RTC_MONTH);  in ds1286_set_time()
255 	ds1286_rtc_write(priv, 0, RTC_HUNDREDTH_SECOND);  in ds1286_set_time()
258 	spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_set_time()
259 	return 0;  in ds1286_set_time()
271 	spin_lock_irqsave(&priv->lock, flags);  in ds1286_read_alarm()
272 	alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f;  in ds1286_read_alarm()
273 	alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM)  & 0x1f;  in ds1286_read_alarm()
274 	alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM)    & 0x07;  in ds1286_read_alarm()
276 	spin_unlock_irqrestore(&priv->lock, flags);  in ds1286_read_alarm()
278 	alm->time.tm_min = bcd2bin(alm->time.tm_min);  in ds1286_read_alarm()
279 	alm->time.tm_hour = bcd2bin(alm->time.tm_hour);  in ds1286_read_alarm()
280 	alm->time.tm_sec = 0;  in ds1286_read_alarm()
281 	return 0;  in ds1286_read_alarm()
289 	hrs = alm->time.tm_hour;  in ds1286_set_alarm()
290 	min = alm->time.tm_min;  in ds1286_set_alarm()
291 	sec = alm->time.tm_sec;  in ds1286_set_alarm()
294 		hrs = 0xff;  in ds1286_set_alarm()
297 		min = 0xff;  in ds1286_set_alarm()
299 	if (sec != 0)  in ds1286_set_alarm()
300 		return -EINVAL;  in ds1286_set_alarm()
305 	spin_lock(&priv->lock);  in ds1286_set_alarm()
308 	spin_unlock(&priv->lock);  in ds1286_set_alarm()
310 	return 0;  in ds1286_set_alarm()
328 	priv = devm_kzalloc(&pdev->dev, sizeof(struct ds1286_priv), GFP_KERNEL);  in ds1286_probe()
330 		return -ENOMEM;  in ds1286_probe()
332 	priv->rtcregs = devm_platform_ioremap_resource(pdev, 0);  in ds1286_probe()
333 	if (IS_ERR(priv->rtcregs))  in ds1286_probe()
334 		return PTR_ERR(priv->rtcregs);  in ds1286_probe()
336 	spin_lock_init(&priv->lock);  in ds1286_probe()
338 	rtc = devm_rtc_device_register(&pdev->dev, "ds1286", &ds1286_ops,  in ds1286_probe()
342 	priv->rtc = rtc;  in ds1286_probe()
343 	return 0;  in ds1286_probe()
348 		.name	= "rtc-ds1286",
358 MODULE_ALIAS("platform:rtc-ds1286");