1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * ST Thermal Sensor Driver core routines
6  * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
17 /* The Thermal Framework expects millidegrees */
26 	struct device *dev = sensor->dev;  in st_thermal_alloc_regfields()
27 	struct regmap *regmap = sensor->regmap;  in st_thermal_alloc_regfields()
28 	const struct reg_field *reg_fields = sensor->cdata->reg_fields;  in st_thermal_alloc_regfields()
30 	sensor->dcorrect = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
33 	sensor->overflow = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
36 	sensor->temp_data = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
39 	if (IS_ERR(sensor->dcorrect) ||  in st_thermal_alloc_regfields()
40 	    IS_ERR(sensor->overflow) ||  in st_thermal_alloc_regfields()
41 	    IS_ERR(sensor->temp_data)) {  in st_thermal_alloc_regfields()
43 		return -EINVAL;  in st_thermal_alloc_regfields()
46 	return sensor->ops->alloc_regfields(sensor);  in st_thermal_alloc_regfields()
52 	struct device *dev = sensor->dev;  in st_thermal_sensor_on()
54 	ret = clk_prepare_enable(sensor->clk);  in st_thermal_sensor_on()
60 	ret = sensor->ops->power_ctrl(sensor, POWER_ON);  in st_thermal_sensor_on()
63 		clk_disable_unprepare(sensor->clk);  in st_thermal_sensor_on()
73 	ret = sensor->ops->power_ctrl(sensor, POWER_OFF);  in st_thermal_sensor_off()
77 	clk_disable_unprepare(sensor->clk);  in st_thermal_sensor_off()
86 	struct device *dev = sensor->dev;  in st_thermal_calibration()
88 	/* Check if sensor calibration data is already written */  in st_thermal_calibration()
89 	ret = regmap_field_read(sensor->dcorrect, &val);  in st_thermal_calibration()
91 		dev_err(dev, "failed to read calibration data\n");  in st_thermal_calibration()
97 		 * Sensor calibration value not set by bootloader,  in st_thermal_calibration()
98 		 * default calibration data to be used  in st_thermal_calibration()
100 		ret = regmap_field_write(sensor->dcorrect,  in st_thermal_calibration()
101 					 sensor->cdata->calibration_val);  in st_thermal_calibration()
103 			dev_err(dev, "failed to set calibration data\n");  in st_thermal_calibration()
117 	ret = regmap_field_read(sensor->overflow, &overflow);  in st_thermal_get_temp()
121 		return -EIO;  in st_thermal_get_temp()
123 	ret = regmap_field_read(sensor->temp_data, &temp);  in st_thermal_get_temp()
127 	temp += sensor->cdata->temp_adjust_val;  in st_thermal_get_temp()
143 	struct device *dev = &pdev->dev;  in st_thermal_register()
144 	struct device_node *np = dev->of_node;  in st_thermal_register()
151 		return -EINVAL;  in st_thermal_register()
156 		return -ENOMEM;  in st_thermal_register()
158 	sensor->dev = dev;  in st_thermal_register()
161 	if (!(match && match->data))  in st_thermal_register()
162 		return -EINVAL;  in st_thermal_register()
164 	sensor->cdata = match->data;  in st_thermal_register()
165 	if (!sensor->cdata->ops)  in st_thermal_register()
166 		return -EINVAL;  in st_thermal_register()
168 	sensor->ops = sensor->cdata->ops;  in st_thermal_register()
170 	ret = (sensor->ops->regmap_init)(sensor);  in st_thermal_register()
178 	sensor->clk = devm_clk_get(dev, "thermal");  in st_thermal_register()
179 	if (IS_ERR(sensor->clk)) {  in st_thermal_register()
181 		return PTR_ERR(sensor->clk);  in st_thermal_register()
184 	if (sensor->ops->register_enable_irq) {  in st_thermal_register()
185 		ret = sensor->ops->register_enable_irq(sensor);  in st_thermal_register()
198 	sensor->thermal_dev =  in st_thermal_register()
200 	if (IS_ERR(sensor->thermal_dev)) {  in st_thermal_register()
201 		dev_err(dev, "failed to register thermal of zone\n");  in st_thermal_register()
202 		ret = PTR_ERR(sensor->thermal_dev);  in st_thermal_register()
212 	devm_thermal_add_hwmon_sysfs(dev, sensor->thermal_dev);  in st_thermal_register()
228 	thermal_remove_hwmon_sysfs(sensor->thermal_dev);  in st_thermal_unregister()
229 	devm_thermal_of_zone_unregister(sensor->dev, sensor->thermal_dev);  in st_thermal_unregister()
253 	if (sensor->ops->enable_irq) {  in st_thermal_resume()
254 		ret = sensor->ops->enable_irq(sensor);  in st_thermal_resume()
266 MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");