Lines Matching +full:s3c6410 +full:- +full:rtc
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* drivers/rtc/rtc-s3c.c
11 * S3C2410/S3C2440/S3C24XX Internal RTC Driver
20 #include <linux/rtc.h>
31 #include "rtc-s3c.h"
35 struct rtc_device *rtc; member
73 ret = clk_enable(info->rtc_clk); in s3c_rtc_enable_clk()
77 if (info->data->needs_src_clk) { in s3c_rtc_enable_clk()
78 ret = clk_enable(info->rtc_src_clk); in s3c_rtc_enable_clk()
80 clk_disable(info->rtc_clk); in s3c_rtc_enable_clk()
89 if (info->data->needs_src_clk) in s3c_rtc_disable_clk()
90 clk_disable(info->rtc_src_clk); in s3c_rtc_disable_clk()
91 clk_disable(info->rtc_clk); in s3c_rtc_disable_clk()
99 if (info->data->irq_handler) in s3c_rtc_tickirq()
100 info->data->irq_handler(info, S3C2410_INTP_TIC); in s3c_rtc_tickirq()
109 if (info->data->irq_handler) in s3c_rtc_alarmirq()
110 info->data->irq_handler(info, S3C2410_INTP_ALM); in s3c_rtc_alarmirq()
123 dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled); in s3c_rtc_setaie()
129 tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; in s3c_rtc_setaie()
134 writeb(tmp, info->base + S3C2410_RTCALM); in s3c_rtc_setaie()
136 spin_lock_irqsave(&info->alarm_lock, flags); in s3c_rtc_setaie()
138 if (info->alarm_enabled && !enabled) in s3c_rtc_setaie()
140 else if (!info->alarm_enabled && enabled) in s3c_rtc_setaie()
143 info->alarm_enabled = enabled; in s3c_rtc_setaie()
144 spin_unlock_irqrestore(&info->alarm_lock, flags); in s3c_rtc_setaie()
151 /* Set RTC frequency */
157 return -EINVAL; in s3c_rtc_setfreq()
162 spin_lock_irq(&info->pie_lock); in s3c_rtc_setfreq()
164 if (info->data->set_freq) in s3c_rtc_setfreq()
165 info->data->set_freq(info, freq); in s3c_rtc_setfreq()
167 spin_unlock_irq(&info->pie_lock); in s3c_rtc_setfreq()
185 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN); in s3c_rtc_gettime()
186 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR); in s3c_rtc_gettime()
187 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE); in s3c_rtc_gettime()
188 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON); in s3c_rtc_gettime()
189 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR); in s3c_rtc_gettime()
190 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC); in s3c_rtc_gettime()
192 /* the only way to work out whether the system was mid-update in s3c_rtc_gettime()
194 * is zero, then we re-try the entire read in s3c_rtc_gettime()
197 if (rtc_tm->tm_sec == 0 && !have_retried) { in s3c_rtc_gettime()
202 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); in s3c_rtc_gettime()
203 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); in s3c_rtc_gettime()
204 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); in s3c_rtc_gettime()
205 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday); in s3c_rtc_gettime()
206 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon); in s3c_rtc_gettime()
207 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); in s3c_rtc_gettime()
211 rtc_tm->tm_year += 100; in s3c_rtc_gettime()
212 rtc_tm->tm_mon -= 1; in s3c_rtc_gettime()
221 int year = tm->tm_year - 100; in s3c_rtc_settime()
229 dev_err(dev, "rtc only supports 100 years\n"); in s3c_rtc_settime()
230 return -EINVAL; in s3c_rtc_settime()
237 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC); in s3c_rtc_settime()
238 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN); in s3c_rtc_settime()
239 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR); in s3c_rtc_settime()
240 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE); in s3c_rtc_settime()
241 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON); in s3c_rtc_settime()
242 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR); in s3c_rtc_settime()
252 struct rtc_time *alm_tm = &alrm->time; in s3c_rtc_getalarm()
260 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC); in s3c_rtc_getalarm()
261 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN); in s3c_rtc_getalarm()
262 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR); in s3c_rtc_getalarm()
263 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON); in s3c_rtc_getalarm()
264 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE); in s3c_rtc_getalarm()
265 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR); in s3c_rtc_getalarm()
267 alm_en = readb(info->base + S3C2410_RTCALM); in s3c_rtc_getalarm()
271 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; in s3c_rtc_getalarm()
277 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec); in s3c_rtc_getalarm()
280 alm_tm->tm_min = bcd2bin(alm_tm->tm_min); in s3c_rtc_getalarm()
283 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour); in s3c_rtc_getalarm()
286 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday); in s3c_rtc_getalarm()
289 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon); in s3c_rtc_getalarm()
290 alm_tm->tm_mon -= 1; in s3c_rtc_getalarm()
294 alm_tm->tm_year = bcd2bin(alm_tm->tm_year); in s3c_rtc_getalarm()
302 struct rtc_time *tm = &alrm->time; in s3c_rtc_setalarm()
306 dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm); in s3c_rtc_setalarm()
312 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; in s3c_rtc_setalarm()
313 writeb(0x00, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
315 if (tm->tm_sec < 60 && tm->tm_sec >= 0) { in s3c_rtc_setalarm()
317 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC); in s3c_rtc_setalarm()
320 if (tm->tm_min < 60 && tm->tm_min >= 0) { in s3c_rtc_setalarm()
322 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN); in s3c_rtc_setalarm()
325 if (tm->tm_hour < 24 && tm->tm_hour >= 0) { in s3c_rtc_setalarm()
327 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR); in s3c_rtc_setalarm()
330 if (tm->tm_mon < 12 && tm->tm_mon >= 0) { in s3c_rtc_setalarm()
332 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON); in s3c_rtc_setalarm()
335 if (tm->tm_mday <= 31 && tm->tm_mday >= 1) { in s3c_rtc_setalarm()
337 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE); in s3c_rtc_setalarm()
342 writeb(alrm_en, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
344 s3c_rtc_setaie(dev, alrm->enabled); in s3c_rtc_setalarm()
360 if (info->data->enable_tick) in s3c_rtc_proc()
361 info->data->enable_tick(info, seq); in s3c_rtc_proc()
381 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
382 /* re-enable the device, and check it is ok */ in s3c24xx_rtc_enable()
384 dev_info(info->dev, "rtc disabled, re-enabling\n"); in s3c24xx_rtc_enable()
386 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
387 writew(tmp | S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
391 dev_info(info->dev, "removing RTCCON_CNTSEL\n"); in s3c24xx_rtc_enable()
393 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
395 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
399 dev_info(info->dev, "removing RTCCON_CLKRST\n"); in s3c24xx_rtc_enable()
401 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
403 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
411 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
413 writew(con, info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
415 con = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
417 writeb(con, info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
424 con = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
427 writew(con, info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
434 s3c_rtc_setaie(info->dev, 0); in s3c_rtc_remove()
436 if (info->data->needs_src_clk) in s3c_rtc_remove()
437 clk_unprepare(info->rtc_src_clk); in s3c_rtc_remove()
438 clk_unprepare(info->rtc_clk); in s3c_rtc_remove()
449 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); in s3c_rtc_probe()
451 return -ENOMEM; in s3c_rtc_probe()
454 info->irq_tick = platform_get_irq(pdev, 1); in s3c_rtc_probe()
455 if (info->irq_tick < 0) in s3c_rtc_probe()
456 return info->irq_tick; in s3c_rtc_probe()
458 info->dev = &pdev->dev; in s3c_rtc_probe()
459 info->data = of_device_get_match_data(&pdev->dev); in s3c_rtc_probe()
460 if (!info->data) { in s3c_rtc_probe()
461 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n"); in s3c_rtc_probe()
462 return -EINVAL; in s3c_rtc_probe()
464 spin_lock_init(&info->pie_lock); in s3c_rtc_probe()
465 spin_lock_init(&info->alarm_lock); in s3c_rtc_probe()
469 info->irq_alarm = platform_get_irq(pdev, 0); in s3c_rtc_probe()
470 if (info->irq_alarm < 0) in s3c_rtc_probe()
471 return info->irq_alarm; in s3c_rtc_probe()
473 dev_dbg(&pdev->dev, "s3c2410_rtc: tick irq %d, alarm irq %d\n", in s3c_rtc_probe()
474 info->irq_tick, info->irq_alarm); in s3c_rtc_probe()
477 info->base = devm_platform_ioremap_resource(pdev, 0); in s3c_rtc_probe()
478 if (IS_ERR(info->base)) in s3c_rtc_probe()
479 return PTR_ERR(info->base); in s3c_rtc_probe()
481 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); in s3c_rtc_probe()
482 if (IS_ERR(info->rtc_clk)) { in s3c_rtc_probe()
483 ret = PTR_ERR(info->rtc_clk); in s3c_rtc_probe()
484 if (ret != -EPROBE_DEFER) in s3c_rtc_probe()
485 dev_err(&pdev->dev, "failed to find rtc clock\n"); in s3c_rtc_probe()
487 dev_dbg(&pdev->dev, "probe deferred due to missing rtc clk\n"); in s3c_rtc_probe()
490 ret = clk_prepare_enable(info->rtc_clk); in s3c_rtc_probe()
494 if (info->data->needs_src_clk) { in s3c_rtc_probe()
495 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src"); in s3c_rtc_probe()
496 if (IS_ERR(info->rtc_src_clk)) { in s3c_rtc_probe()
497 ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk), in s3c_rtc_probe()
498 "failed to find rtc source clock\n"); in s3c_rtc_probe()
501 ret = clk_prepare_enable(info->rtc_src_clk); in s3c_rtc_probe()
507 if (info->data->enable) in s3c_rtc_probe()
508 info->data->enable(info); in s3c_rtc_probe()
510 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", in s3c_rtc_probe()
511 readw(info->base + S3C2410_RTCCON)); in s3c_rtc_probe()
513 device_init_wakeup(&pdev->dev, 1); in s3c_rtc_probe()
515 /* Check RTC Time */ in s3c_rtc_probe()
516 if (s3c_rtc_gettime(&pdev->dev, &rtc_tm)) { in s3c_rtc_probe()
524 s3c_rtc_settime(&pdev->dev, &rtc_tm); in s3c_rtc_probe()
526 dev_warn(&pdev->dev, "warning: invalid RTC value so initializing it\n"); in s3c_rtc_probe()
529 /* register RTC and exit */ in s3c_rtc_probe()
530 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, in s3c_rtc_probe()
532 if (IS_ERR(info->rtc)) { in s3c_rtc_probe()
533 dev_err(&pdev->dev, "cannot attach rtc\n"); in s3c_rtc_probe()
534 ret = PTR_ERR(info->rtc); in s3c_rtc_probe()
538 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq, in s3c_rtc_probe()
539 0, "s3c2410-rtc alarm", info); in s3c_rtc_probe()
541 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret); in s3c_rtc_probe()
545 ret = devm_request_irq(&pdev->dev, info->irq_tick, s3c_rtc_tickirq, in s3c_rtc_probe()
546 0, "s3c2410-rtc tick", info); in s3c_rtc_probe()
548 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_tick, ret); in s3c_rtc_probe()
552 if (info->data->select_tick_clk) in s3c_rtc_probe()
553 info->data->select_tick_clk(info); in s3c_rtc_probe()
562 if (info->data->disable) in s3c_rtc_probe()
563 info->data->disable(info); in s3c_rtc_probe()
565 if (info->data->needs_src_clk) in s3c_rtc_probe()
566 clk_disable_unprepare(info->rtc_src_clk); in s3c_rtc_probe()
568 clk_disable_unprepare(info->rtc_clk); in s3c_rtc_probe()
585 if (info->data->save_tick_cnt) in s3c_rtc_suspend()
586 info->data->save_tick_cnt(info); in s3c_rtc_suspend()
588 if (info->data->disable) in s3c_rtc_suspend()
589 info->data->disable(info); in s3c_rtc_suspend()
591 if (device_may_wakeup(dev) && !info->wake_en) { in s3c_rtc_suspend()
592 if (enable_irq_wake(info->irq_alarm) == 0) in s3c_rtc_suspend()
593 info->wake_en = true; in s3c_rtc_suspend()
605 if (info->data->enable) in s3c_rtc_resume()
606 info->data->enable(info); in s3c_rtc_resume()
608 if (info->data->restore_tick_cnt) in s3c_rtc_resume()
609 info->data->restore_tick_cnt(info); in s3c_rtc_resume()
613 if (device_may_wakeup(dev) && info->wake_en) { in s3c_rtc_resume()
614 disable_irq_wake(info->irq_alarm); in s3c_rtc_resume()
615 info->wake_en = false; in s3c_rtc_resume()
625 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c24xx_rtc_irq()
630 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c6410_rtc_irq()
631 writeb(mask, info->base + S3C2410_INTP); in s3c6410_rtc_irq()
639 tmp = readb(info->base + S3C2410_TICNT); in s3c2410_rtc_setfreq()
642 val = (info->rtc->max_user_freq / freq) - 1; in s3c2410_rtc_setfreq()
645 writel(tmp, info->base + S3C2410_TICNT); in s3c2410_rtc_setfreq()
653 tmp = readb(info->base + S3C2410_TICNT); in s3c2416_rtc_setfreq()
656 val = (info->rtc->max_user_freq / freq) - 1; in s3c2416_rtc_setfreq()
659 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); in s3c2416_rtc_setfreq()
661 writel(S3C2416_TICNT2_PART(val), info->base + S3C2416_TICNT2); in s3c2416_rtc_setfreq()
663 writel(tmp, info->base + S3C2410_TICNT); in s3c2416_rtc_setfreq()
671 tmp = readb(info->base + S3C2410_TICNT); in s3c2443_rtc_setfreq()
674 val = (info->rtc->max_user_freq / freq) - 1; in s3c2443_rtc_setfreq()
677 writel(S3C2443_TICNT1_PART(val), info->base + S3C2443_TICNT1); in s3c2443_rtc_setfreq()
679 writel(tmp, info->base + S3C2410_TICNT); in s3c2443_rtc_setfreq()
686 val = (info->rtc->max_user_freq / freq) - 1; in s3c6410_rtc_setfreq()
687 writel(val, info->base + S3C2410_TICNT); in s3c6410_rtc_setfreq()
694 ticnt = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_enable_tick()
704 con = readw(info->base + S3C2410_RTCCON); in s3c2416_rtc_select_tick_clk()
706 writew(con, info->base + S3C2410_RTCCON); in s3c2416_rtc_select_tick_clk()
713 ticnt = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_enable_tick()
721 info->ticnt_save = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_save_tick_cnt()
726 writeb(info->ticnt_save, info->base + S3C2410_TICNT); in s3c24xx_rtc_restore_tick_cnt()
731 info->ticnt_en_save = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_save_tick_cnt()
732 info->ticnt_en_save &= S3C64XX_RTCCON_TICEN; in s3c6410_rtc_save_tick_cnt()
733 info->ticnt_save = readl(info->base + S3C2410_TICNT); in s3c6410_rtc_save_tick_cnt()
740 writel(info->ticnt_save, info->base + S3C2410_TICNT); in s3c6410_rtc_restore_tick_cnt()
741 if (info->ticnt_en_save) { in s3c6410_rtc_restore_tick_cnt()
742 con = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_restore_tick_cnt()
743 writew(con | info->ticnt_en_save, info->base + S3C2410_RTCCON); in s3c6410_rtc_restore_tick_cnt()
796 .compatible = "samsung,s3c2410-rtc",
799 .compatible = "samsung,s3c2416-rtc",
802 .compatible = "samsung,s3c2443-rtc",
805 .compatible = "samsung,s3c6410-rtc",
808 .compatible = "samsung,exynos3250-rtc",
819 .name = "s3c-rtc",
826 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
829 MODULE_ALIAS("platform:s3c2410-rtc");