drivers/hwmon/tmp102.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
13 #include <linux/hwmon-sysfs.h>
52 #define CONVERSION_TIME_MS		35	/* in milli-seconds */
60 /* convert left adjusted 13-bit TMP102 register value to milliCelsius */
66 /* convert milliCelsius to left adjusted 13-bit TMP102 register value */
82 		if (time_before(jiffies, tmp102->ready_time)) {  in tmp102_read()
84 			return -EAGAIN;  in tmp102_read()
95 		return -EOPNOTSUPP;  in tmp102_read()
98 	err = regmap_read(tmp102->regmap, reg, &regval);  in tmp102_read()
120 		return -EOPNOTSUPP;  in tmp102_write()
123 	temp = clamp_val(temp, -256000, 255000);  in tmp102_write()
124 	return regmap_write(tmp102->regmap, reg, tmp102_mC_to_reg(temp));  in tmp102_write()
167 	regmap_write(tmp102->regmap, TMP102_CONF_REG, tmp102->config_orig);  in tmp102_restore_config()
194 	struct device *dev = &client->dev;  in tmp102_probe()
200 	if (!i2c_check_functionality(client->adapter,  in tmp102_probe()
204 		return -ENODEV;  in tmp102_probe()
209 		return -ENOMEM;  in tmp102_probe()
213 	tmp102->regmap = devm_regmap_init_i2c(client, &tmp102_regmap_config);  in tmp102_probe()
214 	if (IS_ERR(tmp102->regmap))  in tmp102_probe()
215 		return PTR_ERR(tmp102->regmap);  in tmp102_probe()
217 	err = regmap_read(tmp102->regmap, TMP102_CONF_REG, &regval);  in tmp102_probe()
226 		return -ENODEV;  in tmp102_probe()
229 	tmp102->config_orig = regval;  in tmp102_probe()
238 	err = regmap_write(tmp102->regmap, TMP102_CONF_REG, regval);  in tmp102_probe()
248 	tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS);  in tmp102_probe()
250 	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,  in tmp102_probe()
268 	return regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,  in tmp102_suspend()
278 	err = regmap_update_bits(tmp102->regmap, TMP102_CONF_REG,  in tmp102_resume()
281 	tmp102->ready_time = jiffies + msecs_to_jiffies(CONVERSION_TIME_MS);  in tmp102_resume()