1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/clk-provider.h>
24 /* RTC - Real time clock registers */
33 /* CSR - Control and status registers */
39 /* ALARM - Alarm registers */
47 #define ISL12022_ALARM_LEN	(ISL12022_REG_DWA0 - ISL12022_REG_SCA0 + 1)
49 /* TEMP - Temperature sensor registers */
94  * A user-initiated temperature conversion is not started by this function,
107 	 * Temperature is represented as a 10-bit number, unit half-Kelvins.  in isl12022_hwmon_read_temp()
111 	temp -= 273000;  in isl12022_hwmon_read_temp()
125 	return -EOPNOTSUPP;  in isl12022_hwmon_read()
146 	struct regmap *regmap = isl12022->regmap;  in isl12022_hwmon_register()
169  * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
174 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_read_time()
194 	tm->tm_sec = bcd2bin(buf[ISL12022_REG_SC] & 0x7F);  in isl12022_rtc_read_time()
195 	tm->tm_min = bcd2bin(buf[ISL12022_REG_MN] & 0x7F);  in isl12022_rtc_read_time()
196 	tm->tm_hour = bcd2bin(buf[ISL12022_REG_HR] & 0x3F);  in isl12022_rtc_read_time()
197 	tm->tm_mday = bcd2bin(buf[ISL12022_REG_DT] & 0x3F);  in isl12022_rtc_read_time()
198 	tm->tm_wday = buf[ISL12022_REG_DW] & 0x07;  in isl12022_rtc_read_time()
199 	tm->tm_mon = bcd2bin(buf[ISL12022_REG_MO] & 0x1F) - 1;  in isl12022_rtc_read_time()
200 	tm->tm_year = bcd2bin(buf[ISL12022_REG_YR]) + 100;  in isl12022_rtc_read_time()
210 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_set_time()
223 	buf[ISL12022_REG_SC] = bin2bcd(tm->tm_sec);  in isl12022_rtc_set_time()
224 	buf[ISL12022_REG_MN] = bin2bcd(tm->tm_min);  in isl12022_rtc_set_time()
225 	buf[ISL12022_REG_HR] = bin2bcd(tm->tm_hour) | ISL12022_HR_MIL;  in isl12022_rtc_set_time()
227 	buf[ISL12022_REG_DT] = bin2bcd(tm->tm_mday);  in isl12022_rtc_set_time()
229 	/* month, 1 - 12 */  in isl12022_rtc_set_time()
230 	buf[ISL12022_REG_MO] = bin2bcd(tm->tm_mon + 1);  in isl12022_rtc_set_time()
233 	buf[ISL12022_REG_YR] = bin2bcd(tm->tm_year % 100);  in isl12022_rtc_set_time()
235 	buf[ISL12022_REG_DW] = tm->tm_wday & 0x07;  in isl12022_rtc_set_time()
242 	struct rtc_time *tm = &alarm->time;  in isl12022_rtc_read_alarm()
244 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_read_alarm()
267 	tm->tm_sec  = bcd2bin(buf[ISL12022_REG_SCA0 - ISL12022_ALARM] & 0x7F);  in isl12022_rtc_read_alarm()
268 	tm->tm_min  = bcd2bin(buf[ISL12022_REG_MNA0 - ISL12022_ALARM] & 0x7F);  in isl12022_rtc_read_alarm()
269 	tm->tm_hour = bcd2bin(buf[ISL12022_REG_HRA0 - ISL12022_ALARM] & 0x3F);  in isl12022_rtc_read_alarm()
270 	tm->tm_mday = bcd2bin(buf[ISL12022_REG_DTA0 - ISL12022_ALARM] & 0x3F);  in isl12022_rtc_read_alarm()
271 	tm->tm_mon  = bcd2bin(buf[ISL12022_REG_MOA0 - ISL12022_ALARM] & 0x1F) - 1;  in isl12022_rtc_read_alarm()
272 	tm->tm_wday = buf[ISL12022_REG_DWA0 - ISL12022_ALARM]         & 0x07;  in isl12022_rtc_read_alarm()
273 	tm->tm_year = bcd2bin(yr) + 100;  in isl12022_rtc_read_alarm()
277 			alarm->enabled = 1;  in isl12022_rtc_read_alarm()
289 	struct rtc_time *alarm_tm = &alarm->time;  in isl12022_rtc_set_alarm()
291 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_set_alarm()
301 	if (!alarm->enabled || rtc_tm_sub(alarm_tm, &rtc_tm) <= 0)  in isl12022_rtc_set_alarm()
307 	 * Set non-matching day of the week to safeguard against early false  in isl12022_rtc_set_alarm()
325 	regs[ISL12022_REG_SCA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_sec) | enable;  in isl12022_rtc_set_alarm()
326 	regs[ISL12022_REG_MNA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_min) | enable;  in isl12022_rtc_set_alarm()
327 	regs[ISL12022_REG_HRA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_hour) | enable;  in isl12022_rtc_set_alarm()
328 	regs[ISL12022_REG_DTA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_mday) | enable;  in isl12022_rtc_set_alarm()
329 	regs[ISL12022_REG_MOA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_mon + 1) | enable;  in isl12022_rtc_set_alarm()
330 	regs[ISL12022_REG_DWA0 - ISL12022_ALARM] = bin2bcd(alarm_tm->tm_wday & 7) | enable;  in isl12022_rtc_set_alarm()
345 	struct rtc_device *rtc = isl12022->rtc;  in isl12022_rtc_interrupt()
346 	struct device *dev = &rtc->dev;  in isl12022_rtc_interrupt()
347 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_interrupt()
379 	if (isl12022->irq_enabled == enabled)  in isl12022_rtc_alarm_irq_enable()
383 		enable_irq(isl12022->irq);  in isl12022_rtc_alarm_irq_enable()
385 		disable_irq(isl12022->irq);  in isl12022_rtc_alarm_irq_enable()
387 	isl12022->irq_enabled = enabled;  in isl12022_rtc_alarm_irq_enable()
395 	struct regmap *regmap = isl12022->regmap;  in isl12022_setup_irq()
424 	isl12022->irq = irq;  in isl12022_setup_irq()
431 	struct regmap *regmap = isl12022->regmap;  in isl12022_rtc_ioctl()
451 		return -ENOIOCTLCMD;  in isl12022_rtc_ioctl()
473 	struct regmap *regmap = isl12022->regmap;  in isl12022_register_clock()
477 	if (!device_property_present(dev, "#clock-cells")) {  in isl12022_register_clock()
480 		 * consumption in battery mode by ~25%.  in isl12022_register_clock()
514 	struct regmap *regmap = isl12022->regmap;  in isl12022_set_trip_levels()
515 	u32 levels[2] = {0, 0};  in isl12022_set_trip_levels()  local
519 	device_property_read_u32_array(dev, "isil,battery-trip-levels-microvolt",  in isl12022_set_trip_levels()
520 				       levels, 2);  in isl12022_set_trip_levels()
523 		for (j = 0; j < ARRAY_SIZE(trip_levels[i]) - 1; j++) {  in isl12022_set_trip_levels()
524 			if (levels[i] <= trip_levels[i][j])  in isl12022_set_trip_levels()
536 		dev_warn(dev, "unable to set battery alarm levels: %d\n", ret);  in isl12022_set_trip_levels()
541 	 * status register. In battery backup mode, those bits have  in isl12022_set_trip_levels()
543 	 * values for up to a minute after power-on.  in isl12022_set_trip_levels()
556 	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))  in isl12022_probe()
557 		return -ENODEV;  in isl12022_probe()
560 	isl12022 = devm_kzalloc(&client->dev, sizeof(*isl12022), GFP_KERNEL);  in isl12022_probe()
562 		return -ENOMEM;  in isl12022_probe()
566 		return dev_err_probe(&client->dev, PTR_ERR(regmap), "regmap allocation failed\n");  in isl12022_probe()
567 	isl12022->regmap = regmap;  in isl12022_probe()
569 	dev_set_drvdata(&client->dev, isl12022);  in isl12022_probe()
571 	ret = isl12022_register_clock(&client->dev);  in isl12022_probe()
575 	isl12022_set_trip_levels(&client->dev);  in isl12022_probe()
576 	isl12022_hwmon_register(&client->dev);  in isl12022_probe()
578 	rtc = devm_rtc_allocate_device(&client->dev);  in isl12022_probe()
581 	isl12022->rtc = rtc;  in isl12022_probe()
583 	rtc->ops = &isl12022_rtc_ops;  in isl12022_probe()
584 	rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;  in isl12022_probe()
585 	rtc->range_max = RTC_TIMESTAMP_END_2099;  in isl12022_probe()
587 	if (client->irq > 0) {  in isl12022_probe()
588 		ret = isl12022_setup_irq(&client->dev, client->irq);  in isl12022_probe()
592 		clear_bit(RTC_FEATURE_ALARM, rtc->features);  in isl12022_probe()
613 		.name	= "rtc-isl12022",