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
62 ret = clk_enable(info->rtc_clk); in s3c_rtc_enable_clk()
66 if (info->data->needs_src_clk) { in s3c_rtc_enable_clk()
67 ret = clk_enable(info->rtc_src_clk); in s3c_rtc_enable_clk()
69 clk_disable(info->rtc_clk); in s3c_rtc_enable_clk()
78 if (info->data->needs_src_clk) in s3c_rtc_disable_clk()
79 clk_disable(info->rtc_src_clk); in s3c_rtc_disable_clk()
80 clk_disable(info->rtc_clk); in s3c_rtc_disable_clk()
88 if (info->data->irq_handler) in s3c_rtc_alarmirq()
89 info->data->irq_handler(info, S3C2410_INTP_ALM); in s3c_rtc_alarmirq()
102 dev_dbg(info->dev, "%s: aie=%d\n", __func__, enabled); in s3c_rtc_setaie()
108 tmp = readb(info->base + S3C2410_RTCALM) & ~S3C2410_RTCALM_ALMEN; in s3c_rtc_setaie()
113 writeb(tmp, info->base + S3C2410_RTCALM); in s3c_rtc_setaie()
115 spin_lock_irqsave(&info->alarm_lock, flags); in s3c_rtc_setaie()
117 if (info->alarm_enabled && !enabled) in s3c_rtc_setaie()
119 else if (!info->alarm_enabled && enabled) in s3c_rtc_setaie()
122 info->alarm_enabled = enabled; in s3c_rtc_setaie()
123 spin_unlock_irqrestore(&info->alarm_lock, flags); in s3c_rtc_setaie()
142 rtc_tm->tm_min = readb(info->base + S3C2410_RTCMIN); in s3c_rtc_gettime()
143 rtc_tm->tm_hour = readb(info->base + S3C2410_RTCHOUR); in s3c_rtc_gettime()
144 rtc_tm->tm_mday = readb(info->base + S3C2410_RTCDATE); in s3c_rtc_gettime()
145 rtc_tm->tm_mon = readb(info->base + S3C2410_RTCMON); in s3c_rtc_gettime()
146 rtc_tm->tm_year = readb(info->base + S3C2410_RTCYEAR); in s3c_rtc_gettime()
147 rtc_tm->tm_sec = readb(info->base + S3C2410_RTCSEC); in s3c_rtc_gettime()
149 /* the only way to work out whether the system was mid-update in s3c_rtc_gettime()
151 * is zero, then we re-try the entire read in s3c_rtc_gettime()
154 if (rtc_tm->tm_sec == 0 && !have_retried) { in s3c_rtc_gettime()
159 rtc_tm->tm_sec = bcd2bin(rtc_tm->tm_sec); in s3c_rtc_gettime()
160 rtc_tm->tm_min = bcd2bin(rtc_tm->tm_min); in s3c_rtc_gettime()
161 rtc_tm->tm_hour = bcd2bin(rtc_tm->tm_hour); in s3c_rtc_gettime()
162 rtc_tm->tm_mday = bcd2bin(rtc_tm->tm_mday); in s3c_rtc_gettime()
163 rtc_tm->tm_mon = bcd2bin(rtc_tm->tm_mon); in s3c_rtc_gettime()
164 rtc_tm->tm_year = bcd2bin(rtc_tm->tm_year); in s3c_rtc_gettime()
168 rtc_tm->tm_year += 100; in s3c_rtc_gettime()
169 rtc_tm->tm_mon -= 1; in s3c_rtc_gettime()
178 int year = tm->tm_year - 100; in s3c_rtc_settime()
186 dev_err(dev, "rtc only supports 100 years\n"); in s3c_rtc_settime()
187 return -EINVAL; in s3c_rtc_settime()
194 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_RTCSEC); in s3c_rtc_settime()
195 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_RTCMIN); in s3c_rtc_settime()
196 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_RTCHOUR); in s3c_rtc_settime()
197 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_RTCDATE); in s3c_rtc_settime()
198 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_RTCMON); in s3c_rtc_settime()
199 writeb(bin2bcd(year), info->base + S3C2410_RTCYEAR); in s3c_rtc_settime()
209 struct rtc_time *alm_tm = &alrm->time; in s3c_rtc_getalarm()
217 alm_tm->tm_sec = readb(info->base + S3C2410_ALMSEC); in s3c_rtc_getalarm()
218 alm_tm->tm_min = readb(info->base + S3C2410_ALMMIN); in s3c_rtc_getalarm()
219 alm_tm->tm_hour = readb(info->base + S3C2410_ALMHOUR); in s3c_rtc_getalarm()
220 alm_tm->tm_mon = readb(info->base + S3C2410_ALMMON); in s3c_rtc_getalarm()
221 alm_tm->tm_mday = readb(info->base + S3C2410_ALMDATE); in s3c_rtc_getalarm()
222 alm_tm->tm_year = readb(info->base + S3C2410_ALMYEAR); in s3c_rtc_getalarm()
224 alm_en = readb(info->base + S3C2410_RTCALM); in s3c_rtc_getalarm()
228 alrm->enabled = (alm_en & S3C2410_RTCALM_ALMEN) ? 1 : 0; in s3c_rtc_getalarm()
234 alm_tm->tm_sec = bcd2bin(alm_tm->tm_sec); in s3c_rtc_getalarm()
237 alm_tm->tm_min = bcd2bin(alm_tm->tm_min); in s3c_rtc_getalarm()
240 alm_tm->tm_hour = bcd2bin(alm_tm->tm_hour); in s3c_rtc_getalarm()
243 alm_tm->tm_mday = bcd2bin(alm_tm->tm_mday); in s3c_rtc_getalarm()
246 alm_tm->tm_mon = bcd2bin(alm_tm->tm_mon); in s3c_rtc_getalarm()
247 alm_tm->tm_mon -= 1; in s3c_rtc_getalarm()
251 alm_tm->tm_year = bcd2bin(alm_tm->tm_year); in s3c_rtc_getalarm()
259 struct rtc_time *tm = &alrm->time; in s3c_rtc_setalarm()
263 dev_dbg(dev, "s3c_rtc_setalarm: %d, %ptR\n", alrm->enabled, tm); in s3c_rtc_setalarm()
269 alrm_en = readb(info->base + S3C2410_RTCALM) & S3C2410_RTCALM_ALMEN; in s3c_rtc_setalarm()
270 writeb(0x00, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
272 if (tm->tm_sec < 60 && tm->tm_sec >= 0) { in s3c_rtc_setalarm()
274 writeb(bin2bcd(tm->tm_sec), info->base + S3C2410_ALMSEC); in s3c_rtc_setalarm()
277 if (tm->tm_min < 60 && tm->tm_min >= 0) { in s3c_rtc_setalarm()
279 writeb(bin2bcd(tm->tm_min), info->base + S3C2410_ALMMIN); in s3c_rtc_setalarm()
282 if (tm->tm_hour < 24 && tm->tm_hour >= 0) { in s3c_rtc_setalarm()
284 writeb(bin2bcd(tm->tm_hour), info->base + S3C2410_ALMHOUR); in s3c_rtc_setalarm()
287 if (tm->tm_mon < 12 && tm->tm_mon >= 0) { in s3c_rtc_setalarm()
289 writeb(bin2bcd(tm->tm_mon + 1), info->base + S3C2410_ALMMON); in s3c_rtc_setalarm()
292 if (tm->tm_mday <= 31 && tm->tm_mday >= 1) { in s3c_rtc_setalarm()
294 writeb(bin2bcd(tm->tm_mday), info->base + S3C2410_ALMDATE); in s3c_rtc_setalarm()
299 writeb(alrm_en, info->base + S3C2410_RTCALM); in s3c_rtc_setalarm()
301 s3c_rtc_setaie(dev, alrm->enabled); in s3c_rtc_setalarm()
320 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
321 /* re-enable the device, and check it is ok */ in s3c24xx_rtc_enable()
323 dev_info(info->dev, "rtc disabled, re-enabling\n"); in s3c24xx_rtc_enable()
325 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
326 writew(tmp | S3C2410_RTCCON_RTCEN, info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
330 dev_info(info->dev, "removing RTCCON_CNTSEL\n"); in s3c24xx_rtc_enable()
332 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
334 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
338 dev_info(info->dev, "removing RTCCON_CLKRST\n"); in s3c24xx_rtc_enable()
340 tmp = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
342 info->base + S3C2410_RTCCON); in s3c24xx_rtc_enable()
350 con = readw(info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
352 writew(con, info->base + S3C2410_RTCCON); in s3c24xx_rtc_disable()
354 con = readb(info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
356 writeb(con, info->base + S3C2410_TICNT); in s3c24xx_rtc_disable()
363 con = readw(info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
366 writew(con, info->base + S3C2410_RTCCON); in s3c6410_rtc_disable()
373 s3c_rtc_setaie(info->dev, 0); in s3c_rtc_remove()
375 if (info->data->needs_src_clk) in s3c_rtc_remove()
376 clk_unprepare(info->rtc_src_clk); in s3c_rtc_remove()
377 clk_unprepare(info->rtc_clk); in s3c_rtc_remove()
387 info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); in s3c_rtc_probe()
389 return -ENOMEM; in s3c_rtc_probe()
391 info->dev = &pdev->dev; in s3c_rtc_probe()
392 info->data = of_device_get_match_data(&pdev->dev); in s3c_rtc_probe()
393 if (!info->data) { in s3c_rtc_probe()
394 dev_err(&pdev->dev, "failed getting s3c_rtc_data\n"); in s3c_rtc_probe()
395 return -EINVAL; in s3c_rtc_probe()
397 spin_lock_init(&info->alarm_lock); in s3c_rtc_probe()
401 info->irq_alarm = platform_get_irq(pdev, 0); in s3c_rtc_probe()
402 if (info->irq_alarm < 0) in s3c_rtc_probe()
403 return info->irq_alarm; in s3c_rtc_probe()
405 dev_dbg(&pdev->dev, "s3c2410_rtc: alarm irq %d\n", info->irq_alarm); in s3c_rtc_probe()
408 info->base = devm_platform_ioremap_resource(pdev, 0); in s3c_rtc_probe()
409 if (IS_ERR(info->base)) in s3c_rtc_probe()
410 return PTR_ERR(info->base); in s3c_rtc_probe()
412 info->rtc_clk = devm_clk_get(&pdev->dev, "rtc"); in s3c_rtc_probe()
413 if (IS_ERR(info->rtc_clk)) { in s3c_rtc_probe()
414 ret = PTR_ERR(info->rtc_clk); in s3c_rtc_probe()
415 if (ret != -EPROBE_DEFER) in s3c_rtc_probe()
416 dev_err(&pdev->dev, "failed to find rtc clock\n"); in s3c_rtc_probe()
418 dev_dbg(&pdev->dev, "probe deferred due to missing rtc clk\n"); in s3c_rtc_probe()
421 ret = clk_prepare_enable(info->rtc_clk); in s3c_rtc_probe()
425 if (info->data->needs_src_clk) { in s3c_rtc_probe()
426 info->rtc_src_clk = devm_clk_get(&pdev->dev, "rtc_src"); in s3c_rtc_probe()
427 if (IS_ERR(info->rtc_src_clk)) { in s3c_rtc_probe()
428 ret = dev_err_probe(&pdev->dev, PTR_ERR(info->rtc_src_clk), in s3c_rtc_probe()
429 "failed to find rtc source clock\n"); in s3c_rtc_probe()
432 ret = clk_prepare_enable(info->rtc_src_clk); in s3c_rtc_probe()
437 /* disable RTC enable bits potentially set by the bootloader */ in s3c_rtc_probe()
438 if (info->data->disable) in s3c_rtc_probe()
439 info->data->disable(info); in s3c_rtc_probe()
442 if (info->data->enable) in s3c_rtc_probe()
443 info->data->enable(info); in s3c_rtc_probe()
445 dev_dbg(&pdev->dev, "s3c2410_rtc: RTCCON=%02x\n", in s3c_rtc_probe()
446 readw(info->base + S3C2410_RTCCON)); in s3c_rtc_probe()
448 device_init_wakeup(&pdev->dev, 1); in s3c_rtc_probe()
450 /* register RTC and exit */ in s3c_rtc_probe()
451 info->rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops, in s3c_rtc_probe()
453 if (IS_ERR(info->rtc)) { in s3c_rtc_probe()
454 dev_err(&pdev->dev, "cannot attach rtc\n"); in s3c_rtc_probe()
455 ret = PTR_ERR(info->rtc); in s3c_rtc_probe()
459 ret = devm_request_irq(&pdev->dev, info->irq_alarm, s3c_rtc_alarmirq, in s3c_rtc_probe()
460 0, "s3c2410-rtc alarm", info); in s3c_rtc_probe()
462 dev_err(&pdev->dev, "IRQ%d error %d\n", info->irq_alarm, ret); in s3c_rtc_probe()
471 if (info->data->disable) in s3c_rtc_probe()
472 info->data->disable(info); in s3c_rtc_probe()
474 if (info->data->needs_src_clk) in s3c_rtc_probe()
475 clk_disable_unprepare(info->rtc_src_clk); in s3c_rtc_probe()
477 clk_disable_unprepare(info->rtc_clk); in s3c_rtc_probe()
493 if (info->data->disable) in s3c_rtc_suspend()
494 info->data->disable(info); in s3c_rtc_suspend()
496 if (device_may_wakeup(dev) && !info->wake_en) { in s3c_rtc_suspend()
497 if (enable_irq_wake(info->irq_alarm) == 0) in s3c_rtc_suspend()
498 info->wake_en = true; in s3c_rtc_suspend()
510 if (info->data->enable) in s3c_rtc_resume()
511 info->data->enable(info); in s3c_rtc_resume()
515 if (device_may_wakeup(dev) && info->wake_en) { in s3c_rtc_resume()
516 disable_irq_wake(info->irq_alarm); in s3c_rtc_resume()
517 info->wake_en = false; in s3c_rtc_resume()
527 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c24xx_rtc_irq()
532 rtc_update_irq(info->rtc, 1, RTC_AF | RTC_IRQF); in s3c6410_rtc_irq()
533 writeb(mask, info->base + S3C2410_INTP); in s3c6410_rtc_irq()
563 .compatible = "samsung,s3c2410-rtc",
566 .compatible = "samsung,s3c2416-rtc",
569 .compatible = "samsung,s3c2443-rtc",
572 .compatible = "samsung,s3c6410-rtc",
575 .compatible = "samsung,exynos3250-rtc",
586 .name = "s3c-rtc",
593 MODULE_DESCRIPTION("Samsung S3C RTC Driver");
596 MODULE_ALIAS("platform:s3c2410-rtc");