Lines Matching +full:current +full:- +full:sense +full:- +full:shunt

1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright 2015-2019 Analog Devices Inc.
27  * struct adm1177_state - driver instance specific data
29  * @r_sense_uohm:	current sense resistor value
30  * @alert_threshold_ua:	current limit for shutdown
42 	return i2c_master_recv(st->client, data, num);  in adm1177_read_raw()
47 	return i2c_smbus_write_byte(st->client, cmd);  in adm1177_write_cmd()
56 	val = 0xFFULL * alert_threshold_ua * st->r_sense_uohm;  in adm1177_write_alert_thr()
62 	ret = i2c_smbus_write_byte_data(st->client, ADM1177_REG_ALERT_TH,  in adm1177_write_alert_thr()
67 	st->alert_threshold_ua = alert_threshold_ua;  in adm1177_write_alert_thr()
92 				       4096 * st->r_sense_uohm);  in adm1177_read()
95 			*val = st->alert_threshold_ua;  in adm1177_read()
98 			return -EOPNOTSUPP;  in adm1177_read()
109 		if (st->vrange_high)  in adm1177_read()
117 		return -EOPNOTSUPP;  in adm1177_read()
133 			return -EOPNOTSUPP;  in adm1177_write()
136 		return -EOPNOTSUPP;  in adm1177_write()
156 			if (st->r_sense_uohm)  in adm1177_is_visible()
160 			if (st->r_sense_uohm)  in adm1177_is_visible()
192 	struct device *dev = &client->dev;  in adm1177_probe()
200 		return -ENOMEM;  in adm1177_probe()
202 	st->client = client;  in adm1177_probe()
204 	ret = devm_regulator_get_enable_optional(&client->dev, "vref");  in adm1177_probe()
205 	if (ret == -EPROBE_DEFER)  in adm1177_probe()
206 		return -EPROBE_DEFER;  in adm1177_probe()
208 	if (device_property_read_u32(dev, "shunt-resistor-micro-ohms",  in adm1177_probe()
209 				     &st->r_sense_uohm))  in adm1177_probe()
210 		st->r_sense_uohm = 0;  in adm1177_probe()
211 	if (device_property_read_u32(dev, "adi,shutdown-threshold-microamp",  in adm1177_probe()
213 		if (st->r_sense_uohm)  in adm1177_probe()
216 			 * shunt-resistor  in adm1177_probe()
219 						     st->r_sense_uohm);  in adm1177_probe()
223 	st->vrange_high = device_property_read_bool(dev,  in adm1177_probe()
224 						    "adi,vrange-high-enable");  in adm1177_probe()
225 	if (alert_threshold_ua && st->r_sense_uohm)  in adm1177_probe()
230 				    (st->vrange_high ? 0 : ADM1177_CMD_VRANGE));  in adm1177_probe()
235 		devm_hwmon_device_register_with_info(dev, client->name, st,  in adm1177_probe()