1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * rtc-tps65910.c -- TPS65910 Real Time Clock interface
8  * Based on original TI driver rtc-twl.c
32 #define NUM_TIME_REGS	(TPS65910_YEARS - TPS65910_SECONDS + 1)
35 #define NUM_COMP_REGS	(TPS65910_RTC_COMP_MSB - TPS65910_RTC_COMP_LSB + 1)
38 #define MIN_OFFSET	(-277761)
50 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_alarm_irq_enable()
56 	return regmap_write(tps->regmap, TPS65910_RTC_INTERRUPTS, val);  in tps65910_rtc_alarm_irq_enable()
65  *  - Months are 1..12 vs Linux 0-11
66  *  - Years are 0..99 vs Linux 1900..N (we assume 21st century)
71 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_read_time()
75 	ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL,  in tps65910_rtc_read_time()
82 	ret = regmap_bulk_read(tps->regmap, TPS65910_SECONDS, rtc_data,  in tps65910_rtc_read_time()
89 	tm->tm_sec = bcd2bin(rtc_data[0]);  in tps65910_rtc_read_time()
90 	tm->tm_min = bcd2bin(rtc_data[1]);  in tps65910_rtc_read_time()
91 	tm->tm_hour = bcd2bin(rtc_data[2]);  in tps65910_rtc_read_time()
92 	tm->tm_mday = bcd2bin(rtc_data[3]);  in tps65910_rtc_read_time()
93 	tm->tm_mon = bcd2bin(rtc_data[4]) - 1;  in tps65910_rtc_read_time()
94 	tm->tm_year = bcd2bin(rtc_data[5]) + 100;  in tps65910_rtc_read_time()
102 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_set_time()
105 	rtc_data[0] = bin2bcd(tm->tm_sec);  in tps65910_rtc_set_time()
106 	rtc_data[1] = bin2bcd(tm->tm_min);  in tps65910_rtc_set_time()
107 	rtc_data[2] = bin2bcd(tm->tm_hour);  in tps65910_rtc_set_time()
108 	rtc_data[3] = bin2bcd(tm->tm_mday);  in tps65910_rtc_set_time()
109 	rtc_data[4] = bin2bcd(tm->tm_mon + 1);  in tps65910_rtc_set_time()
110 	rtc_data[5] = bin2bcd(tm->tm_year - 100);  in tps65910_rtc_set_time()
113 	ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL,  in tps65910_rtc_set_time()
120 	/* update all the time registers in one shot */  in tps65910_rtc_set_time()
121 	ret = regmap_bulk_write(tps->regmap, TPS65910_SECONDS, rtc_data,  in tps65910_rtc_set_time()
129 	ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL,  in tps65910_rtc_set_time()
144 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_read_alarm()
147 	ret = regmap_bulk_read(tps->regmap, TPS65910_ALARM_SECONDS, alarm_data,  in tps65910_rtc_read_alarm()
154 	alm->time.tm_sec = bcd2bin(alarm_data[0]);  in tps65910_rtc_read_alarm()
155 	alm->time.tm_min = bcd2bin(alarm_data[1]);  in tps65910_rtc_read_alarm()
156 	alm->time.tm_hour = bcd2bin(alarm_data[2]);  in tps65910_rtc_read_alarm()
157 	alm->time.tm_mday = bcd2bin(alarm_data[3]);  in tps65910_rtc_read_alarm()
158 	alm->time.tm_mon = bcd2bin(alarm_data[4]) - 1;  in tps65910_rtc_read_alarm()
159 	alm->time.tm_year = bcd2bin(alarm_data[5]) + 100;  in tps65910_rtc_read_alarm()
161 	ret = regmap_read(tps->regmap, TPS65910_RTC_INTERRUPTS, &int_val);  in tps65910_rtc_read_alarm()
166 		alm->enabled = 1;  in tps65910_rtc_read_alarm()
174 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_set_alarm()
181 	alarm_data[0] = bin2bcd(alm->time.tm_sec);  in tps65910_rtc_set_alarm()
182 	alarm_data[1] = bin2bcd(alm->time.tm_min);  in tps65910_rtc_set_alarm()
183 	alarm_data[2] = bin2bcd(alm->time.tm_hour);  in tps65910_rtc_set_alarm()
184 	alarm_data[3] = bin2bcd(alm->time.tm_mday);  in tps65910_rtc_set_alarm()
185 	alarm_data[4] = bin2bcd(alm->time.tm_mon + 1);  in tps65910_rtc_set_alarm()
186 	alarm_data[5] = bin2bcd(alm->time.tm_year - 100);  in tps65910_rtc_set_alarm()
188 	/* update all the alarm registers in one shot */  in tps65910_rtc_set_alarm()
189 	ret = regmap_bulk_write(tps->regmap, TPS65910_ALARM_SECONDS,  in tps65910_rtc_set_alarm()
196 	if (alm->enabled)  in tps65910_rtc_set_alarm()
205 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_set_calibration()
211 	 * crystal inaccuracies. One time every hour when seconds counter  in tps65910_rtc_set_calibration()
217 	 * Valid range for compensation value: [-32768 .. 32766]  in tps65910_rtc_set_calibration()
219 	if ((calibration < -32768) || (calibration > 32766)) {  in tps65910_rtc_set_calibration()
222 		return -EINVAL;  in tps65910_rtc_set_calibration()
230 	/* Update all the compensation registers in one shot */  in tps65910_rtc_set_calibration()
231 	ret = regmap_bulk_write(tps->regmap, TPS65910_RTC_COMP_LSB,  in tps65910_rtc_set_calibration()
239 	ret = regmap_update_bits(tps->regmap, TPS65910_RTC_CTRL,  in tps65910_rtc_set_calibration()
250 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_get_calibration()
255 	ret = regmap_read(tps->regmap, TPS65910_RTC_CTRL, &ctrl);  in tps65910_rtc_get_calibration()
265 	ret = regmap_bulk_read(tps->regmap, TPS65910_RTC_COMP_LSB, comp_data,  in tps65910_rtc_get_calibration()
292 		tmp -= TICKS_PER_HOUR / 2LL;  in tps65910_read_offset()
298 	*offset = (long)-tmp;  in tps65910_read_offset()
311 		return -ERANGE;  in tps65910_set_offset()
316 		tmp -= PPB_MULT / 2LL;  in tps65910_set_offset()
322 	calibration = (int)-tmp;  in tps65910_set_offset()
333 	struct tps65910 *tps = dev_get_drvdata(dev->parent);  in tps65910_rtc_interrupt()
338 	ret = regmap_read(tps->regmap, TPS65910_RTC_STATUS, &rtc_reg);  in tps65910_rtc_interrupt()
345 	ret = regmap_write(tps->regmap, TPS65910_RTC_STATUS, rtc_reg);  in tps65910_rtc_interrupt()
350 	rtc_update_irq(tps_rtc->rtc, 1, events);  in tps65910_rtc_interrupt()
373 	tps65910 = dev_get_drvdata(pdev->dev.parent);  in tps65910_rtc_probe()
375 	tps_rtc = devm_kzalloc(&pdev->dev, sizeof(struct tps65910_rtc),  in tps65910_rtc_probe()
378 		return -ENOMEM;  in tps65910_rtc_probe()
380 	tps_rtc->rtc = devm_rtc_allocate_device(&pdev->dev);  in tps65910_rtc_probe()
381 	if (IS_ERR(tps_rtc->rtc))  in tps65910_rtc_probe()
382 		return PTR_ERR(tps_rtc->rtc);  in tps65910_rtc_probe()
385 	ret = regmap_read(tps65910->regmap, TPS65910_RTC_STATUS, &rtc_reg);  in tps65910_rtc_probe()
389 	ret = regmap_write(tps65910->regmap, TPS65910_RTC_STATUS, rtc_reg);  in tps65910_rtc_probe()
393 	dev_dbg(&pdev->dev, "Enabling rtc-tps65910.\n");  in tps65910_rtc_probe()
396 	ret = regmap_update_bits(tps65910->regmap, TPS65910_DEVCTRL,  in tps65910_rtc_probe()
402 	ret = regmap_write(tps65910->regmap, TPS65910_RTC_CTRL, rtc_reg);  in tps65910_rtc_probe()
412 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,  in tps65910_rtc_probe()
414 		dev_name(&pdev->dev), &pdev->dev);  in tps65910_rtc_probe()
416 		irq = -1;  in tps65910_rtc_probe()
418 	tps_rtc->irq = irq;  in tps65910_rtc_probe()
419 	if (irq != -1) {  in tps65910_rtc_probe()
420 		if (device_property_present(tps65910->dev, "wakeup-source"))  in tps65910_rtc_probe()
421 			device_init_wakeup(&pdev->dev, 1);  in tps65910_rtc_probe()
423 			device_set_wakeup_capable(&pdev->dev, 1);  in tps65910_rtc_probe()
425 		clear_bit(RTC_FEATURE_ALARM, tps_rtc->rtc->features);  in tps65910_rtc_probe()
428 	tps_rtc->rtc->ops = &tps65910_rtc_ops;  in tps65910_rtc_probe()
429 	tps_rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in tps65910_rtc_probe()
430 	tps_rtc->rtc->range_max = RTC_TIMESTAMP_END_2099;  in tps65910_rtc_probe()
432 	return devm_rtc_register_device(tps_rtc->rtc);  in tps65910_rtc_probe()
441 		enable_irq_wake(tps_rtc->irq);  in tps65910_rtc_suspend()
450 		disable_irq_wake(tps_rtc->irq);  in tps65910_rtc_resume()
461 		.name	= "tps65910-rtc",
467 MODULE_ALIAS("platform:tps65910-rtc");