1 // SPDX-License-Identifier: GPL-2.0-only
12 #include <linux/hwmon-sysfs.h>
71 /* Return the converted value from the given register in uV or mC */
101 		return -EINVAL;  in ltc2990_get_value()
117 		 /* Vx-Vy, 19.42uV/LSB */  in ltc2990_get_value()
121 		/* Vcc, 305.18uV/LSB, 2.5V offset */  in ltc2990_get_value()
128 		/* Vx, 305.18uV/LSB */  in ltc2990_get_value()
132 		return -EINVAL; /* won't happen, keep compiler happy */  in ltc2990_get_value()
146 	ret = ltc2990_get_value(data->i2c, attr->index, &value);  in ltc2990_value_show()
163 			 (ltc2990_attrs_ena_0[data->mode[0]] &  in ltc2990_attrs_visible()
164 			  ltc2990_attrs_ena_1[data->mode[1]]);  in ltc2990_attrs_visible()
166 	if (attr->index & attrs_mask)  in ltc2990_attrs_visible()
167 		return a->mode;  in ltc2990_attrs_visible()
209 	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA |  in ltc2990_i2c_probe()
211 		return -ENODEV;  in ltc2990_i2c_probe()
213 	data = devm_kzalloc(&i2c->dev, sizeof(struct ltc2990_data), GFP_KERNEL);  in ltc2990_i2c_probe()
215 		return -ENOMEM;  in ltc2990_i2c_probe()
217 	data->i2c = i2c;  in ltc2990_i2c_probe()
219 	if (dev_fwnode(&i2c->dev)) {  in ltc2990_i2c_probe()
220 		ret = device_property_read_u32_array(&i2c->dev,  in ltc2990_i2c_probe()
221 						     "lltc,meas-mode",  in ltc2990_i2c_probe()
222 						     data->mode, 2);  in ltc2990_i2c_probe()
226 		if (data->mode[0] & ~LTC2990_MODE0_MASK ||  in ltc2990_i2c_probe()
227 		    data->mode[1] & ~LTC2990_MODE1_MASK)  in ltc2990_i2c_probe()
228 			return -EINVAL;  in ltc2990_i2c_probe()
234 		data->mode[0] = ret >> LTC2990_MODE0_SHIFT & LTC2990_MODE0_MASK;  in ltc2990_i2c_probe()
235 		data->mode[1] = ret >> LTC2990_MODE1_SHIFT & LTC2990_MODE1_MASK;  in ltc2990_i2c_probe()
240 					data->mode[0] << LTC2990_MODE0_SHIFT |  in ltc2990_i2c_probe()
241 					data->mode[1] << LTC2990_MODE1_SHIFT);  in ltc2990_i2c_probe()
243 		dev_err(&i2c->dev, "Error: Failed to set control mode.\n");  in ltc2990_i2c_probe()
249 		dev_err(&i2c->dev, "Error: Failed to start acquisition.\n");  in ltc2990_i2c_probe()
253 	hwmon_dev = devm_hwmon_device_register_with_groups(&i2c->dev,  in ltc2990_i2c_probe()
254 							   i2c->name,  in ltc2990_i2c_probe()
277 MODULE_DESCRIPTION("LTC2990 Sensor Driver");