1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright (c) 2011-2015, 2017, 2020, The Linux Foundation. All rights reserved.
62 /* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
79 	struct iio_channel		*adc;  member
90 	ret = regmap_read(chip->map, chip->base + addr, &val);  in qpnp_tm_read()
100 	return regmap_write(chip->map, chip->base + addr, data);  in qpnp_tm_write()
104  * qpnp_tm_get_temp_stage() - return over-temperature stage
118 	if (chip->subtype == QPNP_TM_SUBTYPE_GEN1)  in qpnp_tm_get_temp_stage()
135 	WARN_ON(!mutex_is_locked(&chip->lock));  in qpnp_tm_update_temp_no_adc()
142 	if (chip->subtype == QPNP_TM_SUBTYPE_GEN1) {  in qpnp_tm_update_temp_no_adc()
144 		stage_old = chip->stage;  in qpnp_tm_update_temp_no_adc()
147 		stage_old = alarm_state_map[chip->stage];  in qpnp_tm_update_temp_no_adc()
151 		/* increasing stage, use lower bound */  in qpnp_tm_update_temp_no_adc()
152 		chip->temp = (stage_new - 1) * TEMP_STAGE_STEP +  in qpnp_tm_update_temp_no_adc()
153 			     chip->thresh * TEMP_THRESH_STEP +  in qpnp_tm_update_temp_no_adc()
156 		/* decreasing stage, use upper bound */  in qpnp_tm_update_temp_no_adc()
157 		chip->temp = stage_new * TEMP_STAGE_STEP +  in qpnp_tm_update_temp_no_adc()
158 			     chip->thresh * TEMP_THRESH_STEP -  in qpnp_tm_update_temp_no_adc()
162 	chip->stage = stage;  in qpnp_tm_update_temp_no_adc()
173 		return -EINVAL;  in qpnp_tm_get_temp()
175 	if (!chip->initialized) {  in qpnp_tm_get_temp()
180 	if (!chip->adc) {  in qpnp_tm_get_temp()
181 		mutex_lock(&chip->lock);  in qpnp_tm_get_temp()
183 		mutex_unlock(&chip->lock);  in qpnp_tm_get_temp()
187 		ret = iio_read_channel_processed(chip->adc, &mili_celsius);  in qpnp_tm_get_temp()
191 		chip->temp = mili_celsius;  in qpnp_tm_get_temp()
194 	*temp = chip->temp;  in qpnp_tm_get_temp()
205 	WARN_ON(!mutex_is_locked(&chip->lock));  in qpnp_tm_update_critical_trip_temp()
215 		chip->thresh = THRESH_MIN;  in qpnp_tm_update_critical_trip_temp()
220 		chip->thresh = THRESH_MAX -  in qpnp_tm_update_critical_trip_temp()
221 			((STAGE2_THRESHOLD_MAX - temp) /  in qpnp_tm_update_critical_trip_temp()
225 		chip->thresh = THRESH_MAX;  in qpnp_tm_update_critical_trip_temp()
227 		if (chip->adc)  in qpnp_tm_update_critical_trip_temp()
230 			dev_warn(chip->dev,  in qpnp_tm_update_critical_trip_temp()
231 …"No ADC is configured and critical temperature is above the maximum stage 2 threshold of 140 C! Co…  in qpnp_tm_update_critical_trip_temp()
235 	reg |= chip->thresh;  in qpnp_tm_update_critical_trip_temp()
248 	trip_points = of_thermal_get_trip_points(chip->tz_dev);  in qpnp_tm_set_trip_temp()
250 		return -EINVAL;  in qpnp_tm_set_trip_temp()
255 	mutex_lock(&chip->lock);  in qpnp_tm_set_trip_temp()
257 	mutex_unlock(&chip->lock);  in qpnp_tm_set_trip_temp()
271 	thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);  in qpnp_tm_isr()
282 	ntrips = of_thermal_get_ntrips(chip->tz_dev);  in qpnp_tm_get_critical_trip_temp()
286 	trips = of_thermal_get_trip_points(chip->tz_dev);  in qpnp_tm_get_critical_trip_temp()
291 		if (of_thermal_is_trip_valid(chip->tz_dev, i) &&  in qpnp_tm_get_critical_trip_temp()
311 	mutex_lock(&chip->lock);  in qpnp_tm_init()
317 	chip->thresh = reg & SHUTDOWN_CTRL1_THRESHOLD_MASK;  in qpnp_tm_init()
318 	chip->temp = DEFAULT_TEMP;  in qpnp_tm_init()
323 	chip->stage = ret;  in qpnp_tm_init()
325 	stage = chip->subtype == QPNP_TM_SUBTYPE_GEN1  in qpnp_tm_init()
326 		? chip->stage : alarm_state_map[chip->stage];  in qpnp_tm_init()
329 		chip->temp = chip->thresh * TEMP_THRESH_STEP +  in qpnp_tm_init()
330 			     (stage - 1) * TEMP_STAGE_STEP +  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 		dev_err(&pdev->dev, "could not read type\n");  in qpnp_tm_probe()
399 		dev_err(&pdev->dev, "could not read subtype\n");  in qpnp_tm_probe()
405 		dev_err(&pdev->dev, "invalid type 0x%02x or subtype 0x%02x\n",  in qpnp_tm_probe()
407 		return -ENODEV;  in qpnp_tm_probe()
410 	chip->subtype = subtype;  in qpnp_tm_probe()
417 	chip->tz_dev = devm_thermal_zone_of_sensor_register(  in qpnp_tm_probe()
418 		&pdev->dev, 0, chip, &qpnp_tm_sensor_ops);  in qpnp_tm_probe()
419 	if (IS_ERR(chip->tz_dev)) {  in qpnp_tm_probe()
420 		dev_err(&pdev->dev, "failed to register sensor\n");  in qpnp_tm_probe()
421 		return PTR_ERR(chip->tz_dev);  in qpnp_tm_probe()
426 		dev_err(&pdev->dev, "init failed\n");  in qpnp_tm_probe()
430 	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL, qpnp_tm_isr,  in qpnp_tm_probe()
431 					IRQF_ONESHOT, node->name, chip);  in qpnp_tm_probe()
435 	thermal_zone_device_update(chip->tz_dev, THERMAL_EVENT_UNSPECIFIED);  in qpnp_tm_probe()
441 	{ .compatible = "qcom,spmi-temp-alarm" },
448 		.name = "spmi-temp-alarm",
455 MODULE_ALIAS("platform:spmi-temp-alarm");