1 // SPDX-License-Identifier: GPL-2.0
3  * Real Time Clock driver for AB-RTCMC-32.768kHz-EOZ9 chip.
15 #include <linux/hwmon-sysfs.h>
62 #define ABEOZ953_TEMP_MIN		-60
84 	struct regmap *regmap = data->regmap;  in abeoz9_check_validity()
96 		dev_warn(dev, "power-on reset detected, date is invalid\n");  in abeoz9_check_validity()
97 		return -EINVAL;  in abeoz9_check_validity()
103 		return -EINVAL;  in abeoz9_check_validity()
109 		return -EINVAL;  in abeoz9_check_validity()
134 	ret = regmap_bulk_read(data->regmap, ABEOZ9_REG_SEC,  in abeoz9_rtc_get_time()
142 	tm->tm_sec = bcd2bin(regs[ABEOZ9_REG_SEC - ABEOZ9_REG_SEC] & 0x7F);  in abeoz9_rtc_get_time()
143 	tm->tm_min = bcd2bin(regs[ABEOZ9_REG_MIN - ABEOZ9_REG_SEC] & 0x7F);  in abeoz9_rtc_get_time()
145 	if (regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & ABEOZ9_HOURS_PM) {  in abeoz9_rtc_get_time()
146 		tm->tm_hour =  in abeoz9_rtc_get_time()
147 			bcd2bin(regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & 0x1f);  in abeoz9_rtc_get_time()
148 		if (regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] & ABEOZ9_HOURS_PM)  in abeoz9_rtc_get_time()
149 			tm->tm_hour += 12;  in abeoz9_rtc_get_time()
151 		tm->tm_hour = bcd2bin(regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
154 	tm->tm_mday = bcd2bin(regs[ABEOZ9_REG_DAYS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
155 	tm->tm_wday = bcd2bin(regs[ABEOZ9_REG_WEEKDAYS - ABEOZ9_REG_SEC]);  in abeoz9_rtc_get_time()
156 	tm->tm_mon  = bcd2bin(regs[ABEOZ9_REG_MONTHS - ABEOZ9_REG_SEC]) - 1;  in abeoz9_rtc_get_time()
157 	tm->tm_year = bcd2bin(regs[ABEOZ9_REG_YEARS - ABEOZ9_REG_SEC]) + 100;  in abeoz9_rtc_get_time()
165 	struct regmap *regmap = data->regmap;  in abeoz9_rtc_set_time()
169 	regs[ABEOZ9_REG_SEC - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_sec);  in abeoz9_rtc_set_time()
170 	regs[ABEOZ9_REG_MIN - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_min);  in abeoz9_rtc_set_time()
171 	regs[ABEOZ9_REG_HOURS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_hour);  in abeoz9_rtc_set_time()
172 	regs[ABEOZ9_REG_DAYS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_mday);  in abeoz9_rtc_set_time()
173 	regs[ABEOZ9_REG_WEEKDAYS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_wday);  in abeoz9_rtc_set_time()
174 	regs[ABEOZ9_REG_MONTHS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_mon + 1);  in abeoz9_rtc_set_time()
175 	regs[ABEOZ9_REG_YEARS - ABEOZ9_REG_SEC] = bin2bcd(tm->tm_year - 100);  in abeoz9_rtc_set_time()
177 	ret = regmap_bulk_write(data->regmap, ABEOZ9_REG_SEC,  in abeoz9_rtc_set_time()
191 	u32 ohms = 0;  in abeoz9_trickle_parse_dt()  local
193 	if (of_property_read_u32(node, "trickle-resistor-ohms", &ohms))  in abeoz9_trickle_parse_dt()
196 	switch (ohms) {  in abeoz9_trickle_parse_dt()
213 	struct regmap *regmap = data->regmap;  in abeoz9_rtc_setup()
245 	/* Enable built-in termometer */  in abeoz9_rtc_setup()
276 	struct regmap *regmap = data->regmap;  in abeoz9z3_temp_read()
288 		return -EINVAL;  in abeoz9z3_temp_read()
305 		return -EOPNOTSUPP;  in abeoz9z3_temp_read()
362 	data->hwmon_dev =  in abeoz9_hwmon_register()
368 	if (IS_ERR(data->hwmon_dev)) {  in abeoz9_hwmon_register()
370 			 PTR_ERR(data->hwmon_dev));  in abeoz9_hwmon_register()
387 	struct device *dev = &client->dev;  in abeoz9_probe()
391 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |  in abeoz9_probe()
394 		return -ENODEV;  in abeoz9_probe()
405 		return -ENOMEM;  in abeoz9_probe()
407 	data->regmap = regmap;  in abeoz9_probe()
410 	ret = abeoz9_rtc_setup(dev, client->dev.of_node);  in abeoz9_probe()
414 	data->rtc = devm_rtc_allocate_device(dev);  in abeoz9_probe()
415 	ret = PTR_ERR_OR_ZERO(data->rtc);  in abeoz9_probe()
419 	data->rtc->ops = &rtc_ops;  in abeoz9_probe()
420 	data->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in abeoz9_probe()
421 	data->rtc->range_max = RTC_TIMESTAMP_END_2099;  in abeoz9_probe()
423 	ret = rtc_register_device(data->rtc);  in abeoz9_probe()
446 		.name = "rtc-ab-eoz9",
456 MODULE_DESCRIPTION("Abracon AB-RTCMC-32.768kHz-EOZ9 RTC driver");