1 // SPDX-License-Identifier: GPL-2.0
3  * Real Time Clock driver for AB-RTCMC-32.768kHz-EOZ9 chip.
16 #include <linux/hwmon-sysfs.h>
81 #define ABEOZ953_TEMP_MIN		-60
103 	struct regmap *regmap = data->regmap;  in abeoz9_check_validity()
115 		dev_warn(dev, "power-on reset detected, date is invalid\n");  in abeoz9_check_validity()
116 		return -EINVAL;  in abeoz9_check_validity()
122 		return -EINVAL;  in abeoz9_check_validity()
128 		return -EINVAL;  in abeoz9_check_validity()
153 	ret = regmap_bulk_read(data->regmap, ABEOZ9_REG_SEC,  in abeoz9_rtc_get_time()
161 	tm->tm_sec = bcd2bin(regs[ABEOZ9_REG_SEC - ABEOZ9_REG_SEC] & 0x7F);  in abeoz9_rtc_get_time()
162 	tm->tm_min = bcd2bin(regs[ABEOZ9_REG_MIN - ABEOZ9_REG_SEC] & 0x7F);  in abeoz9_rtc_get_time()
164 	if (regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & ABEOZ9_HOURS_PM) {  in abeoz9_rtc_get_time()
165 		tm->tm_hour =  in abeoz9_rtc_get_time()
166 			bcd2bin(regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & 0x1f);  in abeoz9_rtc_get_time()
167 		if (regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & ABEOZ9_HOURS_PM)  in abeoz9_rtc_get_time()
168 			tm->tm_hour += 12;  in abeoz9_rtc_get_time()
170 		tm->tm_hour = bcd2bin(regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
173 	tm->tm_mday = bcd2bin(regs[ABEOZ9_REG_DAYS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
174 	tm->tm_wday = bcd2bin(regs[ABEOZ9_REG_WEEKDAYS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
175 	tm->tm_mon  = bcd2bin(regs[ABEOZ9_REG_MONTHS - ABEOZ9_REG_SEC]) - 1;  in abeoz9_rtc_get_time()
176 	tm->tm_year = bcd2bin(regs[ABEOZ9_REG_YEARS - ABEOZ9_REG_SEC]) + 100;  in abeoz9_rtc_get_time()
184 	struct regmap *regmap = data->regmap;  in abeoz9_rtc_set_time()
188 	regs[ABEOZ9_REG_SEC - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_sec);  in abeoz9_rtc_set_time()
189 	regs[ABEOZ9_REG_MIN - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_min);  in abeoz9_rtc_set_time()
190 	regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_hour);  in abeoz9_rtc_set_time()
191 	regs[ABEOZ9_REG_DAYS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_mday);  in abeoz9_rtc_set_time()
192 	regs[ABEOZ9_REG_WEEKDAYS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_wday);  in abeoz9_rtc_set_time()
193 	regs[ABEOZ9_REG_MONTHS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_mon + 1);  in abeoz9_rtc_set_time()
194 	regs[ABEOZ9_REG_YEARS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_year - 100);  in abeoz9_rtc_set_time()
196 	ret = regmap_bulk_write(data->regmap, ABEOZ9_REG_SEC,  in abeoz9_rtc_set_time()
211 	struct regmap *regmap = data->regmap;  in abeoz9_rtc_read_alarm()
224 	alarm->enabled = val[0] & ABEOZ9_REG_CTRL_INT_AIE;  in abeoz9_rtc_read_alarm()
225 	alarm->pending = val[1] & ABEOZ9_REG_CTRL_INT_FLAG_AF;  in abeoz9_rtc_read_alarm()
231 	alarm->time.tm_sec = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_SEC, regs[0]));  in abeoz9_rtc_read_alarm()
232 	alarm->time.tm_min = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_MIN, regs[1]));  in abeoz9_rtc_read_alarm()
233 	alarm->time.tm_hour = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_HOURS, regs[2]));  in abeoz9_rtc_read_alarm()
235 		alarm->time.tm_hour += 12;  in abeoz9_rtc_read_alarm()
237 	alarm->time.tm_mday = bcd2bin(FIELD_GET(ABEOZ9_BIT_ALARM_DAYS, regs[3]));  in abeoz9_rtc_read_alarm()
246 	return regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT,  in abeoz9_rtc_alarm_irq_enable()
257 	ret = regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG,  in abeoz9_rtc_set_alarm()
263 						   bin2bcd(alarm->time.tm_sec));  in abeoz9_rtc_set_alarm()
265 						   bin2bcd(alarm->time.tm_min));  in abeoz9_rtc_set_alarm()
267 						   bin2bcd(alarm->time.tm_hour));  in abeoz9_rtc_set_alarm()
269 						   bin2bcd(alarm->time.tm_mday));  in abeoz9_rtc_set_alarm()
271 	ret = regmap_bulk_write(data->regmap, ABEOZ9_REG_ALARM_SEC, regs,  in abeoz9_rtc_set_alarm()
276 	return abeoz9_rtc_alarm_irq_enable(dev, alarm->enabled);  in abeoz9_rtc_set_alarm()
285 	ret = regmap_read(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG, &val);  in abeoz9_rtc_irq()
292 	regmap_update_bits(data->regmap, ABEOZ9_REG_CTRL_INT_FLAG,  in abeoz9_rtc_irq()
295 	rtc_update_irq(data->rtc, 1, RTC_IRQF | RTC_AF);  in abeoz9_rtc_irq()
302 	u32 ohms = 0;  in abeoz9_trickle_parse_dt()  local
304 	if (of_property_read_u32(node, "trickle-resistor-ohms", &ohms))  in abeoz9_trickle_parse_dt()
307 	switch (ohms) {  in abeoz9_trickle_parse_dt()
324 	struct regmap *regmap = data->regmap;  in abeoz9_rtc_setup()
356 	/* Enable built-in termometer */  in abeoz9_rtc_setup()
391 	struct regmap *regmap = data->regmap;  in abeoz9z3_temp_read()
403 		return -EINVAL;  in abeoz9z3_temp_read()
420 		return -EOPNOTSUPP;  in abeoz9z3_temp_read()
477 	data->hwmon_dev =  in abeoz9_hwmon_register()
483 	if (IS_ERR(data->hwmon_dev)) {  in abeoz9_hwmon_register()
485 			 PTR_ERR(data->hwmon_dev));  in abeoz9_hwmon_register()
501 	struct device *dev = &client->dev;  in abeoz9_probe()
505 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |  in abeoz9_probe()
508 		return -ENODEV;  in abeoz9_probe()
519 		return -ENOMEM;  in abeoz9_probe()
521 	data->regmap = regmap;  in abeoz9_probe()
524 	ret = abeoz9_rtc_setup(dev, client->dev.of_node);  in abeoz9_probe()
528 	data->rtc = devm_rtc_allocate_device(dev);  in abeoz9_probe()
529 	ret = PTR_ERR_OR_ZERO(data->rtc);  in abeoz9_probe()
533 	data->rtc->ops = &rtc_ops;  in abeoz9_probe()
534 	data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in abeoz9_probe()
535 	data->rtc->range_max = RTC_TIMESTAMP_END_2099;  in abeoz9_probe()
536 	clear_bit(RTC_FEATURE_ALARM, data->rtc->features);  in abeoz9_probe()
538 	if (client->irq > 0) {  in abeoz9_probe()
541 		if (dev_fwnode(&client->dev))  in abeoz9_probe()
544 		ret = devm_request_threaded_irq(dev, client->irq, NULL,  in abeoz9_probe()
553 		clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, data->rtc->features);  in abeoz9_probe()
556 	if (client->irq > 0 || device_property_read_bool(dev, "wakeup-source")) {  in abeoz9_probe()
558 		set_bit(RTC_FEATURE_ALARM, data->rtc->features);  in abeoz9_probe()
561 	ret = devm_rtc_register_device(data->rtc);  in abeoz9_probe()
584 		.name = "rtc-ab-eoz9",
594 MODULE_DESCRIPTION("Abracon AB-RTCMC-32.768kHz-EOZ9 RTC driver");