1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2011-2015, 2017, 2020, The Linux Foundation. All rights reserved.
44 /* Over-temperature trip point values in mC */
66 /* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
82 	struct iio_channel		*adc;  member
94 	ret = regmap_read(chip->map, chip->base + addr, &val);  in qpnp_tm_read()
104 	return regmap_write(chip->map, chip->base + addr, data);  in qpnp_tm_write()
108  * qpnp_tm_decode_temp() - return temperature in mC corresponding to the
109  *		specified over-temperature stage
111  * @stage:		Over-temperature stage
117 	if (!chip->temp_map || chip->thresh >= THRESH_COUNT || stage == 0 ||  in qpnp_tm_decode_temp()
121 	return (*chip->temp_map)[chip->thresh][stage - 1];  in qpnp_tm_decode_temp()
125  * qpnp_tm_get_temp_stage() - return over-temperature stage
139 	if (chip->subtype == QPNP_TM_SUBTYPE_GEN1)  in qpnp_tm_get_temp_stage()
156 	WARN_ON(!mutex_is_locked(&chip->lock));  in qpnp_tm_update_temp_no_adc()
163 	if (chip->subtype == QPNP_TM_SUBTYPE_GEN1) {  in qpnp_tm_update_temp_no_adc()
165 		stage_old = chip->stage;  in qpnp_tm_update_temp_no_adc()
168 		stage_old = alarm_state_map[chip->stage];  in qpnp_tm_update_temp_no_adc()
172 		/* increasing stage, use lower bound */  in qpnp_tm_update_temp_no_adc()
173 		chip->temp = qpnp_tm_decode_temp(chip, stage_new)  in qpnp_tm_update_temp_no_adc()
176 		/* decreasing stage, use upper bound */  in qpnp_tm_update_temp_no_adc()
177 		chip->temp = qpnp_tm_decode_temp(chip, stage_new + 1)  in qpnp_tm_update_temp_no_adc()
178 				- TEMP_STAGE_HYSTERESIS;  in qpnp_tm_update_temp_no_adc()
181 	chip->stage = stage;  in qpnp_tm_update_temp_no_adc()
192 		return -EINVAL;  in qpnp_tm_get_temp()
194 	if (!chip->initialized) {  in qpnp_tm_get_temp()
199 	if (!chip->adc) {  in qpnp_tm_get_temp()
200 		mutex_lock(&chip->lock);  in qpnp_tm_get_temp()
202 		mutex_unlock(&chip->lock);  in qpnp_tm_get_temp()
206 		ret = iio_read_channel_processed(chip->adc, &mili_celsius);  in qpnp_tm_get_temp()
210 		chip->temp = mili_celsius;  in qpnp_tm_get_temp()
213 	*temp = chip->temp;  in qpnp_tm_get_temp()
221 	long stage2_threshold_min = (*chip->temp_map)[THRESH_MIN][1];  in qpnp_tm_update_critical_trip_temp()
222 	long stage2_threshold_max = (*chip->temp_map)[THRESH_MAX][1];  in qpnp_tm_update_critical_trip_temp()
226 	WARN_ON(!mutex_is_locked(&chip->lock));  in qpnp_tm_update_critical_trip_temp()
236 		chip->thresh = THRESH_MIN;  in qpnp_tm_update_critical_trip_temp()
241 		chip->thresh = THRESH_MAX -  in qpnp_tm_update_critical_trip_temp()
242 			((stage2_threshold_max - temp) /  in qpnp_tm_update_critical_trip_temp()
246 		chip->thresh = THRESH_MAX;  in qpnp_tm_update_critical_trip_temp()
248 		if (chip->adc)  in qpnp_tm_update_critical_trip_temp()
251 			dev_warn(chip->dev,  in qpnp_tm_update_critical_trip_temp()
252 …"No ADC is configured and critical temperature %d mC is above the maximum stage 2 threshold of %ld…  in qpnp_tm_update_critical_trip_temp()
257 	reg |= chip->thresh;  in qpnp_tm_update_critical_trip_temp()
270 	if (trip->type != THERMAL_TRIP_CRITICAL)  in qpnp_tm_set_trip_temp()
273 	mutex_lock(&chip->lock);  in qpnp_tm_set_trip_temp()
275 	mutex_unlock(&chip->lock);  in qpnp_tm_set_trip_temp()
289 	thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);  in qpnp_tm_isr()
306 	mutex_lock(&chip->lock);  in qpnp_tm_init()
312 	chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK;  in qpnp_tm_init()
313 	chip->temp = DEFAULT_TEMP;  in qpnp_tm_init()
318 	chip->stage = ret;  in qpnp_tm_init()
320 	stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1  in qpnp_tm_init()
321 		? chip->stage : alarm_state_map[chip->stage];  in qpnp_tm_init()
324 		chip->temp = qpnp_tm_decode_temp(chip, stage);  in qpnp_tm_init()
326 	mutex_unlock(&chip->lock);  in qpnp_tm_init()
328 	ret = thermal_zone_get_crit_temp(chip->tz_dev, &crit_temp);  in qpnp_tm_init()
332 	mutex_lock(&chip->lock);  in qpnp_tm_init()
338 	/* Enable the thermal alarm PMIC module in always-on mode. */  in qpnp_tm_init()
342 	chip->initialized = true;  in qpnp_tm_init()
345 	mutex_unlock(&chip->lock);  in qpnp_tm_init()
354 	u32 res;  in qpnp_tm_probe()  local
357 	node = pdev->dev.of_node;  in qpnp_tm_probe()
359 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in qpnp_tm_probe()
361 		return -ENOMEM;  in qpnp_tm_probe()
363 	dev_set_drvdata(&pdev->dev, chip);  in qpnp_tm_probe()
364 	chip->dev = &pdev->dev;  in qpnp_tm_probe()
366 	mutex_init(&chip->lock);  in qpnp_tm_probe()
368 	chip->map = dev_get_regmap(pdev->dev.parent, NULL);  in qpnp_tm_probe()
369 	if (!chip->map)  in qpnp_tm_probe()
370 		return -ENXIO;  in qpnp_tm_probe()
372 	ret = of_property_read_u32(node, "reg", &res);  in qpnp_tm_probe()
380 	/* ADC based measurements are optional */  in qpnp_tm_probe()
381 	chip->adc = devm_iio_channel_get(&pdev->dev, "thermal");  in qpnp_tm_probe()
382 	if (IS_ERR(chip->adc)) {  in qpnp_tm_probe()
383 		ret = PTR_ERR(chip->adc);  in qpnp_tm_probe()
384 		chip->adc = NULL;  in qpnp_tm_probe()
385 		if (ret == -EPROBE_DEFER)  in qpnp_tm_probe()
389 	chip->base = res;  in qpnp_tm_probe()
393 		return dev_err_probe(&pdev->dev, ret,  in qpnp_tm_probe()
398 		return dev_err_probe(&pdev->dev, ret,  in qpnp_tm_probe()
403 		return dev_err_probe(&pdev->dev, ret,  in qpnp_tm_probe()
408 		dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",  in qpnp_tm_probe()
410 		return -ENODEV;  in qpnp_tm_probe()
413 	chip->subtype = subtype;  in qpnp_tm_probe()
415 		chip->temp_map = &temp_map_gen2_v1;  in qpnp_tm_probe()
417 		chip->temp_map = &temp_map_gen1;  in qpnp_tm_probe()
424 	chip->tz_dev = devm_thermal_of_zone_register(  in qpnp_tm_probe()
425 		&pdev->dev, 0, chip, &qpnp_tm_sensor_ops);  in qpnp_tm_probe()
426 	if (IS_ERR(chip->tz_dev))  in qpnp_tm_probe()
427 		return dev_err_probe(&pdev->dev, PTR_ERR(chip->tz_dev),  in qpnp_tm_probe()
432 		return dev_err_probe(&pdev->dev, ret, "init failed\n");  in qpnp_tm_probe()
434 	devm_thermal_add_hwmon_sysfs(&pdev->dev, chip->tz_dev);  in qpnp_tm_probe()
436 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, qpnp_tm_isr,  in qpnp_tm_probe()
437 					IRQF_ONESHOT, node->name, chip);  in qpnp_tm_probe()
441 	thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);  in qpnp_tm_probe()
447 	{ .compatible = "qcom,spmi-temp-alarm" },
454 		.name = "spmi-temp-alarm",
461 MODULE_ALIAS("platform:spmi-temp-alarm");