3  * ST Thermal Sensor Driver core routines
23 static int st_thermal_alloc_regfields(struct st_thermal_sensor *sensor)  in st_thermal_alloc_regfields()  argument
25 	struct device *dev = sensor->dev;  in st_thermal_alloc_regfields()
26 	struct regmap *regmap = sensor->regmap;  in st_thermal_alloc_regfields()
27 	const struct reg_field *reg_fields = sensor->cdata->reg_fields;  in st_thermal_alloc_regfields()
29 	sensor->dcorrect = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
32 	sensor->overflow = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
35 	sensor->temp_data = devm_regmap_field_alloc(dev, regmap,  in st_thermal_alloc_regfields()
38 	if (IS_ERR(sensor->dcorrect) ||  in st_thermal_alloc_regfields()
39 	    IS_ERR(sensor->overflow) ||  in st_thermal_alloc_regfields()
40 	    IS_ERR(sensor->temp_data)) {  in st_thermal_alloc_regfields()
45 	return sensor->ops->alloc_regfields(sensor);  in st_thermal_alloc_regfields()
48 static int st_thermal_sensor_on(struct st_thermal_sensor *sensor)  in st_thermal_sensor_on()  argument
51 	struct device *dev = sensor->dev;  in st_thermal_sensor_on()
53 	ret = clk_prepare_enable(sensor->clk);  in st_thermal_sensor_on()
59 	ret = sensor->ops->power_ctrl(sensor, POWER_ON);  in st_thermal_sensor_on()
61 		dev_err(dev, "failed to power on sensor\n");  in st_thermal_sensor_on()
62 		clk_disable_unprepare(sensor->clk);  in st_thermal_sensor_on()
68 static int st_thermal_sensor_off(struct st_thermal_sensor *sensor)  in st_thermal_sensor_off()  argument
72 	ret = sensor->ops->power_ctrl(sensor, POWER_OFF);  in st_thermal_sensor_off()
76 	clk_disable_unprepare(sensor->clk);  in st_thermal_sensor_off()
81 static int st_thermal_calibration(struct st_thermal_sensor *sensor)  in st_thermal_calibration()  argument
85 	struct device *dev = sensor->dev;  in st_thermal_calibration()
87 	/* Check if sensor calibration data is already written */  in st_thermal_calibration()
88 	ret = regmap_field_read(sensor->dcorrect, &val);  in st_thermal_calibration()
96 		 * Sensor calibration value not set by bootloader,  in st_thermal_calibration()
99 		ret = regmap_field_write(sensor->dcorrect,  in st_thermal_calibration()
100 					 sensor->cdata->calibration_val);  in st_thermal_calibration()
111 	struct st_thermal_sensor *sensor = th->devdata;  in st_thermal_get_temp()  local
112 	struct device *dev = sensor->dev;  in st_thermal_get_temp()
117 	ret = regmap_field_read(sensor->overflow, &overflow);  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()
140 	struct st_thermal_sensor *sensor = th->devdata;  in st_thermal_get_trip_type()  local
141 	struct device *dev = sensor->dev;  in st_thermal_get_trip_type()
158 	struct st_thermal_sensor *sensor = th->devdata;  in st_thermal_get_trip_temp()  local
159 	struct device *dev = sensor->dev;  in st_thermal_get_trip_temp()
163 		*temp = mcelsius(sensor->cdata->crit_temp);  in st_thermal_get_trip_temp()
182 	struct st_thermal_sensor *sensor;  in st_thermal_register()  local
195 	sensor = devm_kzalloc(dev, sizeof(*sensor), GFP_KERNEL);  in st_thermal_register()
196 	if (!sensor)  in st_thermal_register()
199 	sensor->dev = dev;  in st_thermal_register()
205 	sensor->cdata = match->data;  in st_thermal_register()
206 	if (!sensor->cdata->ops)  in st_thermal_register()
209 	sensor->ops = sensor->cdata->ops;  in st_thermal_register()
211 	ret = (sensor->ops->regmap_init)(sensor);  in st_thermal_register()
215 	ret = st_thermal_alloc_regfields(sensor);  in st_thermal_register()
219 	sensor->clk = devm_clk_get(dev, "thermal");  in st_thermal_register()
220 	if (IS_ERR(sensor->clk)) {  in st_thermal_register()
222 		return PTR_ERR(sensor->clk);  in st_thermal_register()
225 	if (sensor->ops->register_enable_irq) {  in st_thermal_register()
226 		ret = sensor->ops->register_enable_irq(sensor);  in st_thermal_register()
231 	ret = st_thermal_sensor_on(sensor);  in st_thermal_register()
235 	ret = st_thermal_calibration(sensor);  in st_thermal_register()
239 	polling_delay = sensor->ops->register_enable_irq ? 0 : 1000;  in st_thermal_register()
241 	sensor->thermal_dev =  in st_thermal_register()
242 		thermal_zone_device_register(dev_name(dev), 1, 0, sensor,  in st_thermal_register()
244 	if (IS_ERR(sensor->thermal_dev)) {  in st_thermal_register()
246 		ret = PTR_ERR(sensor->thermal_dev);  in st_thermal_register()
249 	ret = thermal_zone_device_enable(sensor->thermal_dev);  in st_thermal_register()
253 	platform_set_drvdata(pdev, sensor);  in st_thermal_register()
258 	thermal_zone_device_unregister(sensor->thermal_dev);  in st_thermal_register()
260 	st_thermal_sensor_off(sensor);  in st_thermal_register()
268 	struct st_thermal_sensor *sensor = platform_get_drvdata(pdev);  in st_thermal_unregister()  local
270 	st_thermal_sensor_off(sensor);  in st_thermal_unregister()
271 	thermal_zone_device_unregister(sensor->thermal_dev);  in st_thermal_unregister()
280 	struct st_thermal_sensor *sensor = dev_get_drvdata(dev);  in st_thermal_suspend()  local
282 	return st_thermal_sensor_off(sensor);  in st_thermal_suspend()
288 	struct st_thermal_sensor *sensor = dev_get_drvdata(dev);  in st_thermal_resume()  local
290 	ret = st_thermal_sensor_on(sensor);  in st_thermal_resume()
294 	ret = st_thermal_calibration(sensor);  in st_thermal_resume()
298 	if (sensor->ops->enable_irq) {  in st_thermal_resume()
299 		ret = sensor->ops->enable_irq(sensor);  in st_thermal_resume()
312 MODULE_DESCRIPTION("STMicroelectronics STi SoC Thermal Sensor Driver");