1 // SPDX-License-Identifier: GPL-2.0
15 #include <linux/rtc.h>
78 	struct rtc_device	*rtc;  member
87 	return readl(mt2712_rtc->base + reg);  in mt2712_readl()
93 	writel(val, mt2712_rtc->base + reg);  in mt2712_writel()
107 			dev_err(&mt2712_rtc->rtc->dev,  in mt2712_rtc_write_trigger()
131 		rtc_update_irq(mt2712_rtc->rtc, 1, RTC_IRQF | RTC_AF);  in rtc_irq_handler_thread()
141 	tm->tm_sec  = mt2712_readl(mt2712_rtc, MT2712_TC_SEC)  in __mt2712_rtc_read_time()
143 	tm->tm_min  = mt2712_readl(mt2712_rtc, MT2712_TC_MIN)  in __mt2712_rtc_read_time()
145 	tm->tm_hour = mt2712_readl(mt2712_rtc, MT2712_TC_HOU)  in __mt2712_rtc_read_time()
147 	tm->tm_mday = mt2712_readl(mt2712_rtc, MT2712_TC_DOM)  in __mt2712_rtc_read_time()
149 	tm->tm_mon  = (mt2712_readl(mt2712_rtc, MT2712_TC_MTH) - 1)  in __mt2712_rtc_read_time()
151 	tm->tm_year = (mt2712_readl(mt2712_rtc, MT2712_TC_YEA) + 100)  in __mt2712_rtc_read_time()
162 	if (mt2712_rtc->powerlost)  in mt2712_rtc_read_time()
163 		return -EINVAL;  in mt2712_rtc_read_time()
167 	} while (sec < tm->tm_sec);	/* SEC has carried */  in mt2712_rtc_read_time()
176 	mt2712_writel(mt2712_rtc, MT2712_TC_SEC, tm->tm_sec  & MT2712_SEC_MASK);  in mt2712_rtc_set_time()
177 	mt2712_writel(mt2712_rtc, MT2712_TC_MIN, tm->tm_min  & MT2712_MIN_MASK);  in mt2712_rtc_set_time()
178 	mt2712_writel(mt2712_rtc, MT2712_TC_HOU, tm->tm_hour & MT2712_HOU_MASK);  in mt2712_rtc_set_time()
179 	mt2712_writel(mt2712_rtc, MT2712_TC_DOM, tm->tm_mday & MT2712_DOM_MASK);  in mt2712_rtc_set_time()
181 		      (tm->tm_mon + 1) & MT2712_MTH_MASK);  in mt2712_rtc_set_time()
183 		      (tm->tm_year - 100) & MT2712_YEA_MASK);  in mt2712_rtc_set_time()
187 	if (mt2712_rtc->powerlost)  in mt2712_rtc_set_time()
188 		mt2712_rtc->powerlost = false;  in mt2712_rtc_set_time()
196 	struct rtc_time *tm = &alm->time;  in mt2712_rtc_read_alarm()
200 	alm->enabled = !!(irqen & MT2712_IRQ_EN_AL);  in mt2712_rtc_read_alarm()
202 	tm->tm_sec  = mt2712_readl(mt2712_rtc, MT2712_AL_SEC) & MT2712_SEC_MASK;  in mt2712_rtc_read_alarm()
203 	tm->tm_min  = mt2712_readl(mt2712_rtc, MT2712_AL_MIN) & MT2712_MIN_MASK;  in mt2712_rtc_read_alarm()
204 	tm->tm_hour = mt2712_readl(mt2712_rtc, MT2712_AL_HOU) & MT2712_HOU_MASK;  in mt2712_rtc_read_alarm()
205 	tm->tm_mday = mt2712_readl(mt2712_rtc, MT2712_AL_DOM) & MT2712_DOM_MASK;  in mt2712_rtc_read_alarm()
206 	tm->tm_mon  = (mt2712_readl(mt2712_rtc, MT2712_AL_MTH) - 1)  in mt2712_rtc_read_alarm()
208 	tm->tm_year = (mt2712_readl(mt2712_rtc, MT2712_AL_YEA) + 100)  in mt2712_rtc_read_alarm()
234 	struct rtc_time *tm = &alm->time;  in mt2712_rtc_set_alarm()
236 	dev_dbg(&mt2712_rtc->rtc->dev, "set al time: %ptR, alm en: %d\n",  in mt2712_rtc_set_alarm()
237 		tm, alm->enabled);  in mt2712_rtc_set_alarm()
241 		       & ~(MT2712_SEC_MASK)) | (tm->tm_sec  & MT2712_SEC_MASK));  in mt2712_rtc_set_alarm()
244 		       & ~(MT2712_MIN_MASK)) | (tm->tm_min  & MT2712_MIN_MASK));  in mt2712_rtc_set_alarm()
247 		       & ~(MT2712_HOU_MASK)) | (tm->tm_hour & MT2712_HOU_MASK));  in mt2712_rtc_set_alarm()
250 		       & ~(MT2712_DOM_MASK)) | (tm->tm_mday & MT2712_DOM_MASK));  in mt2712_rtc_set_alarm()
254 		      | ((tm->tm_mon + 1) & MT2712_MTH_MASK));  in mt2712_rtc_set_alarm()
258 		      | ((tm->tm_year - 100) & MT2712_YEA_MASK));  in mt2712_rtc_set_alarm()
264 	mt2712_rtc_alarm_irq_enable(dev, alm->enabled);  in mt2712_rtc_set_alarm()
269 /* Init RTC register */
288 		mt2712_rtc->powerlost = true;  in mt2712_rtc_hw_init()
289 		dev_dbg(&mt2712_rtc->rtc->dev,  in mt2712_rtc_hw_init()
292 		mt2712_rtc->powerlost = false;  in mt2712_rtc_hw_init()
295 	/* RTC need POWERKEY1/2 match, then goto normal work mode */  in mt2712_rtc_hw_init()
316 	mt2712_rtc = devm_kzalloc(&pdev->dev,  in mt2712_rtc_probe()
319 		return -ENOMEM;  in mt2712_rtc_probe()
321 	mt2712_rtc->base = devm_platform_ioremap_resource(pdev, 0);  in mt2712_rtc_probe()
322 	if (IS_ERR(mt2712_rtc->base))  in mt2712_rtc_probe()
323 		return PTR_ERR(mt2712_rtc->base);  in mt2712_rtc_probe()
325 	/* rtc hw init */  in mt2712_rtc_probe()
328 	mt2712_rtc->irq = platform_get_irq(pdev, 0);  in mt2712_rtc_probe()
329 	if (mt2712_rtc->irq < 0)  in mt2712_rtc_probe()
330 		return mt2712_rtc->irq;  in mt2712_rtc_probe()
334 	mt2712_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);  in mt2712_rtc_probe()
335 	if (IS_ERR(mt2712_rtc->rtc))  in mt2712_rtc_probe()
336 		return PTR_ERR(mt2712_rtc->rtc);  in mt2712_rtc_probe()
338 	ret = devm_request_threaded_irq(&pdev->dev, mt2712_rtc->irq, NULL,  in mt2712_rtc_probe()
341 					dev_name(&mt2712_rtc->rtc->dev),  in mt2712_rtc_probe()
344 		dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",  in mt2712_rtc_probe()
345 			mt2712_rtc->irq, ret);  in mt2712_rtc_probe()
349 	device_init_wakeup(&pdev->dev, true);  in mt2712_rtc_probe()
351 	mt2712_rtc->rtc->ops = &mt2712_rtc_ops;  in mt2712_rtc_probe()
352 	mt2712_rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in mt2712_rtc_probe()
353 	mt2712_rtc->rtc->range_max = MT2712_RTC_TIMESTAMP_END_2127;  in mt2712_rtc_probe()
355 	return devm_rtc_register_device(mt2712_rtc->rtc);  in mt2712_rtc_probe()
365 		wake_status = enable_irq_wake(mt2712_rtc->irq);  in mt2712_rtc_suspend()
367 			mt2712_rtc->irq_wake_enabled = true;  in mt2712_rtc_suspend()
378 	if (device_may_wakeup(dev) && mt2712_rtc->irq_wake_enabled) {  in mt2712_rtc_resume()
379 		wake_status = disable_irq_wake(mt2712_rtc->irq);  in mt2712_rtc_resume()
381 			mt2712_rtc->irq_wake_enabled = false;  in mt2712_rtc_resume()
392 	{ .compatible = "mediatek,mt2712-rtc", },
400 		.name = "mt2712-rtc",
411 MODULE_DESCRIPTION("MediaTek MT2712 SoC based RTC Driver");