2  *	Real Time Clock interface for Linux on Atmel AT91RM9200
6  *	Converted to RTC class model by Andrew Victor
9  *	Based on s3c2410-rtc.c Simtec Electronics
11  *	Based on sa1100-rtc.c by Nils Faerber
12  *	Based on rtc.c by Paul Gortmaker
32 #include <linux/rtc.h>
38 #include "rtc-at91rm9200.h"
79 	 * Register read back (of any RTC-register) needed to make sure  in at91_rtc_write_idr()
80 	 * IDR-register write has reached the peripheral before updating  in at91_rtc_write_idr()
85 	 * way to be certain would be to poll the IMR-register, which is is  in at91_rtc_write_idr()
99 	if (at91_rtc_config->use_shadow_imr) {  in at91_rtc_read_imr()
125 	tm->tm_sec  = bcd2bin((time & AT91_RTC_SEC) >> 0);  in at91_rtc_decodetime()
126 	tm->tm_min  = bcd2bin((time & AT91_RTC_MIN) >> 8);  in at91_rtc_decodetime()
127 	tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16);  in at91_rtc_decodetime()
131 	 * the year - so these will return an invalid value.  in at91_rtc_decodetime()
133 	tm->tm_year  = bcd2bin(date & AT91_RTC_CENT) * 100;	/* century */  in at91_rtc_decodetime()
134 	tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8);	/* year */  in at91_rtc_decodetime()
136 	tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1;	/* day of the week [0-6], Sunday=0 */  in at91_rtc_decodetime()
137 	tm->tm_mon  = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1;  in at91_rtc_decodetime()
138 	tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24);  in at91_rtc_decodetime()
142  * Read current time and date in RTC
147 	tm->tm_yday = rtc_year_days(tm->tm_mday, tm->tm_mon, tm->tm_year);  in at91_rtc_readtime()
148 	tm->tm_year = tm->tm_year - 1900;  in at91_rtc_readtime()
150 	dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,  in at91_rtc_readtime()
151 		1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,  in at91_rtc_readtime()
152 		tm->tm_hour, tm->tm_min, tm->tm_sec);  in at91_rtc_readtime()
158  * Set current time and date in RTC
164 	dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,  in at91_rtc_settime()
165 		1900 + tm->tm_year, tm->tm_mon, tm->tm_mday,  in at91_rtc_settime()
166 		tm->tm_hour, tm->tm_min, tm->tm_sec);  in at91_rtc_settime()
179 			  bin2bcd(tm->tm_sec) << 0  in at91_rtc_settime()
180 			| bin2bcd(tm->tm_min) << 8  in at91_rtc_settime()
181 			| bin2bcd(tm->tm_hour) << 16);  in at91_rtc_settime()
184 			  bin2bcd((tm->tm_year + 1900) / 100)	/* century */  in at91_rtc_settime()
185 			| bin2bcd(tm->tm_year % 100) << 8	/* year */  in at91_rtc_settime()
186 			| bin2bcd(tm->tm_mon + 1) << 16		/* tm_mon starts at zero */  in at91_rtc_settime()
187 			| bin2bcd(tm->tm_wday + 1) << 21	/* day of the week [0-6], Sunday=0 */  in at91_rtc_settime()
188 			| bin2bcd(tm->tm_mday) << 24);  in at91_rtc_settime()
200  * Read alarm time and date in RTC
204 	struct rtc_time *tm = &alrm->time;  in at91_rtc_readalarm()
207 	tm->tm_year = -1;  in at91_rtc_readalarm()
209 	alrm->enabled = (at91_rtc_read_imr() & AT91_RTC_ALARM)  in at91_rtc_readalarm()
212 	dev_dbg(dev, "%s(): %02d-%02d %02d:%02d:%02d %sabled\n", __func__,  in at91_rtc_readalarm()
213 		tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec,  in at91_rtc_readalarm()
214 		alrm->enabled ? "en" : "dis");  in at91_rtc_readalarm()
220  * Set alarm time and date in RTC
228 	tm.tm_mon = alrm->time.tm_mon;  in at91_rtc_setalarm()
229 	tm.tm_mday = alrm->time.tm_mday;  in at91_rtc_setalarm()
230 	tm.tm_hour = alrm->time.tm_hour;  in at91_rtc_setalarm()
231 	tm.tm_min = alrm->time.tm_min;  in at91_rtc_setalarm()
232 	tm.tm_sec = alrm->time.tm_sec;  in at91_rtc_setalarm()
245 	if (alrm->enabled) {  in at91_rtc_setalarm()
250 	dev_dbg(dev, "%s(): %4d-%02d-%02d %02d:%02d:%02d\n", __func__,  in at91_rtc_setalarm()
270  * Provide additional RTC information in /proc/driver/rtc
285  * IRQ handler for the RTC
290 	struct rtc_device *rtc = platform_get_drvdata(pdev);  in at91_rtc_interrupt()  local
310 			rtc_update_irq(rtc, 1, events);  in at91_rtc_interrupt()
312 			dev_dbg(&pdev->dev, "%s(): num=%ld, events=0x%02lx\n",  in at91_rtc_interrupt()
337 		.compatible = "atmel,at91rm9200-rtc",
340 		.compatible = "atmel,at91sam9x5-rtc",
354 	if (pdev->dev.of_node) {  in at91_rtc_get_config()
355 		match = of_match_node(at91_rtc_dt_ids, pdev->dev.of_node);  in at91_rtc_get_config()
358 		return (const struct at91_rtc_config *)match->data;  in at91_rtc_get_config()
374  * Initialize and install RTC driver
378 	struct rtc_device *rtc;  in at91_rtc_probe()  local
384 		return -ENODEV;  in at91_rtc_probe()
388 		dev_err(&pdev->dev, "no mmio resource defined\n");  in at91_rtc_probe()
389 		return -ENXIO;  in at91_rtc_probe()
394 		dev_err(&pdev->dev, "no irq resource defined\n");  in at91_rtc_probe()
395 		return -ENXIO;  in at91_rtc_probe()
398 	at91_rtc_regs = devm_ioremap(&pdev->dev, regs->start,  in at91_rtc_probe()
401 		dev_err(&pdev->dev, "failed to map registers, aborting.\n");  in at91_rtc_probe()
402 		return -ENOMEM;  in at91_rtc_probe()
405 	rtc = devm_rtc_allocate_device(&pdev->dev);  in at91_rtc_probe()
406 	if (IS_ERR(rtc))  in at91_rtc_probe()
407 		return PTR_ERR(rtc);  in at91_rtc_probe()
408 	platform_set_drvdata(pdev, rtc);  in at91_rtc_probe()
410 	sclk = devm_clk_get(&pdev->dev, NULL);  in at91_rtc_probe()
416 		dev_err(&pdev->dev, "Could not enable slow clock\n");  in at91_rtc_probe()
428 	ret = devm_request_irq(&pdev->dev, irq, at91_rtc_interrupt,  in at91_rtc_probe()
432 		dev_err(&pdev->dev, "IRQ %d already in use.\n", irq);  in at91_rtc_probe()
437 	 * being wake-capable; if it didn't, do that here.  in at91_rtc_probe()
439 	if (!device_can_wakeup(&pdev->dev))  in at91_rtc_probe()
440 		device_init_wakeup(&pdev->dev, 1);  in at91_rtc_probe()
442 	rtc->ops = &at91_rtc_ops;  in at91_rtc_probe()
443 	rtc->range_min = RTC_TIMESTAMP_BEGIN_1900;  in at91_rtc_probe()
444 	rtc->range_max = RTC_TIMESTAMP_END_2099;  in at91_rtc_probe()
445 	ret = rtc_register_device(rtc);  in at91_rtc_probe()
454 	dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");  in at91_rtc_probe()
464  * Disable and remove the RTC driver
488 /* AT91RM9200 RTC Power management control */
517 	struct rtc_device *rtc = dev_get_drvdata(dev);  in at91_rtc_resume()  local
526 				rtc_update_irq(rtc, 1, cached_events);  in at91_rtc_resume()
556 MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200");