1 // SPDX-License-Identifier: GPL-2.0-only
6  * Zero Drift Bi-Directional Current/Power Monitor with I2C Interface
10  * Bi-Directional Current/Power Monitor with I2C Interface
14  * Bi-Directional Current/Power Monitor with I2C Interface
18  * Bi-directional Current/Power Monitor with I2C Interface
59 /* settings - depend on use case */
259 		val = DIV_ROUND_CLOSEST((s16)regval, data->config->shunt_div);  in ina2xx_get_value()
262 		val = (regval >> data->config->bus_voltage_shift) *  in ina2xx_get_value()
263 		  data->config->bus_voltage_lsb;  in ina2xx_get_value()
267 		val = regval * data->power_lsb_uW;  in ina2xx_get_value()
271 		val = (s16)regval * data->current_lsb_uA;  in ina2xx_get_value()
289  * check if the chip has been power cycled or reset. If so, re-initialize it.
294 	struct regmap *regmap = data->regmap;  in ina2xx_read_init()
298 	if (data->config->has_ishunt) {  in ina2xx_read_init()
307 	for (retry = 5; retry; retry--) {  in ina2xx_read_init()
352 	return -ENODEV;  in ina2xx_read_init()
363 		val = clamp_val(val, 0, SHRT_MAX * data->config->shunt_div);  in ina226_alert_to_reg()
364 		val *= data->config->shunt_div;  in ina226_alert_to_reg()
368 		val = (val * 1000) << data->config->bus_voltage_shift;  in ina226_alert_to_reg()
369 		val = DIV_ROUND_CLOSEST(val, data->config->bus_voltage_lsb);  in ina226_alert_to_reg()
372 		val = clamp_val(val, 0, UINT_MAX - data->power_lsb_uW);  in ina226_alert_to_reg()
373 		val = DIV_ROUND_CLOSEST(val, data->power_lsb_uW);  in ina226_alert_to_reg()
378 		val = DIV_ROUND_CLOSEST(val * 1000, data->current_lsb_uA);  in ina226_alert_to_reg()
389 	struct regmap *regmap = data->regmap;  in ina226_alert_limit_read()
393 	mutex_lock(&data->config_lock);  in ina226_alert_limit_read()
407 	mutex_unlock(&data->config_lock);  in ina226_alert_limit_read()
413 	struct regmap *regmap = data->regmap;  in ina226_alert_limit_write()
417 		return -EINVAL;  in ina226_alert_limit_write()
422 	 * if the value is non-zero.  in ina226_alert_limit_write()
424 	mutex_lock(&data->config_lock);  in ina226_alert_limit_write()
439 	mutex_unlock(&data->config_lock);  in ina226_alert_limit_write()
451 		ret = regmap_read(data->regmap, INA2XX_CONFIG, &regval);  in ina2xx_chip_read()
458 		return -EOPNOTSUPP;  in ina2xx_chip_read()
485 	struct regmap *regmap = data->regmap;  in ina2xx_in_read()
507 		return -EOPNOTSUPP;  in ina2xx_in_read()
525 	/* 48-bit register read */  in sy24655_average_power_read()
526 	ret = i2c_smbus_read_i2c_block_data(data->client, reg, 6, template);  in sy24655_average_power_read()
530 		return -EIO;  in sy24655_average_power_read()
542 	*val = DIV_ROUND_CLOSEST(accumulator_24, sample_count) * data->power_lsb_uW;  in sy24655_average_power_read()
560 		return ina226_alert_read(data->regmap, INA226_POWER_OVER_LIMIT_MASK, val);  in ina2xx_power_read()
562 		return -EOPNOTSUPP;  in ina2xx_power_read()
569 	struct regmap *regmap = data->regmap;  in ina2xx_curr_read()
606 		return -EOPNOTSUPP;  in ina2xx_curr_read()
623 		return -EOPNOTSUPP;  in ina2xx_read()
633 		return regmap_update_bits(data->regmap, INA2XX_CONFIG,  in ina2xx_chip_write()
637 		return -EOPNOTSUPP;  in ina2xx_chip_write()
657 		return -EOPNOTSUPP;  in ina2xx_in_write()
671 		return -EOPNOTSUPP;  in ina2xx_power_write()
688 		return -EOPNOTSUPP;  in ina2xx_curr_write()
706 		return -EOPNOTSUPP;  in ina2xx_write()
714 	bool has_alerts = data->config->has_alerts;  in ina2xx_is_visible()
715 	bool has_power_average = data->config->has_power_average;  in ina2xx_is_visible()
716 	enum ina2xx_ids chip = data->chip;  in ina2xx_is_visible()
830 						  data->config->shunt_div);  in ina2xx_set_shunt()
832 		return -EINVAL;  in ina2xx_set_shunt()
834 	data->rshunt = val;  in ina2xx_set_shunt()
835 	data->current_lsb_uA = DIV_ROUND_CLOSEST(dividend, val);  in ina2xx_set_shunt()
836 	data->power_lsb_uW = data->config->power_lsb_factor *  in ina2xx_set_shunt()
837 			     data->current_lsb_uA;  in ina2xx_set_shunt()
847 	return sysfs_emit(buf, "%li\n", data->rshunt);  in shunt_resistor_show()
862 	mutex_lock(&data->config_lock);  in shunt_resistor_store()
864 	mutex_unlock(&data->config_lock);  in shunt_resistor_store()
884 	struct regmap *regmap = data->regmap;  in ina2xx_init()
888 	if (data->config->has_ishunt)  in ina2xx_init()
890 	else if (device_property_read_u32(dev, "shunt-resistor", &shunt) < 0)  in ina2xx_init()
897 	ret = regmap_write(regmap, INA2XX_CONFIG, data->config->config_default);  in ina2xx_init()
901 	if (data->config->has_alerts) {  in ina2xx_init()
902 		bool active_high = device_property_read_bool(dev, "ti,alert-polarity-active-high");  in ina2xx_init()
909 	if (data->config->has_power_average) {  in ina2xx_init()
910 		if (data->chip == sy24655) {  in ina2xx_init()
923 	if (data->config->has_ishunt)  in ina2xx_init()
933 			    data->config->calibration_value);  in ina2xx_init()
938 	struct device *dev = &client->dev;  in ina2xx_probe()
948 		return -ENOMEM;  in ina2xx_probe()
951 	data->client = client;  in ina2xx_probe()
952 	data->config = &ina2xx_config[chip];  in ina2xx_probe()
953 	data->chip = chip;  in ina2xx_probe()
954 	mutex_init(&data->config_lock);  in ina2xx_probe()
956 	data->regmap = devm_regmap_init_i2c(client, &ina2xx_regmap_config);  in ina2xx_probe()
957 	if (IS_ERR(data->regmap)) {  in ina2xx_probe()
959 		return PTR_ERR(data->regmap);  in ina2xx_probe()
970 	hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name,  in ina2xx_probe()
972 							 data->config->has_ishunt ?  in ina2xx_probe()
978 		 client->name, data->rshunt);  in ina2xx_probe()
1039 MODULE_AUTHOR("Lothar Felten <l-felten@ti.com>");