1 // SPDX-License-Identifier: GPL-2.0-only
7  * Copyright (C) 2009, Bollore telecom (www.bolloretelecom.eu).
10  * Adrien Demarez <adrien.demarez@bolloretelecom.eu>
11  * Jeremy Laine <jeremy.laine@bolloretelecom.eu>
19 #include <linux/hwmon-sysfs.h>
35 #define LM73_ID			0x9001	/* 0x0190, byte-swapped */
37 #define LM73_TEMP_MIN		(-256000 / 250)
48 	14,	/* 11-bits (0.25000 C/LSB): RES1 Bit = 0, RES0 Bit = 0 */
49 	28,	/* 12-bits (0.12500 C/LSB): RES1 Bit = 0, RES0 Bit = 1 */
50 	56,	/* 13-bits (0.06250 C/LSB): RES1 Bit = 1, RES0 Bit = 0 */
51 	112,	/* 14-bits (0.03125 C/LSB): RES1 Bit = 1, RES0 Bit = 1 */
60 /*-----------------------------------------------------------------------*/
77 	err = i2c_smbus_write_word_swapped(data->client, attr->index, value);  in temp_store()
88 	s32 err = i2c_smbus_read_word_swapped(data->client, attr->index);  in temp_show()
112 	 * res is already initialized, and everything past the second-to-last  in convrate_store()
116 	while (res < (ARRAY_SIZE(lm73_convrates) - 1) &&  in convrate_store()
120 	mutex_lock(&data->lock);  in convrate_store()
121 	data->ctrl &= LM73_CTRL_TO_MASK;  in convrate_store()
122 	data->ctrl |= res << LM73_CTRL_RES_SHIFT;  in convrate_store()
123 	err = i2c_smbus_write_byte_data(data->client, LM73_REG_CTRL,  in convrate_store()
124 					data->ctrl);  in convrate_store()
125 	mutex_unlock(&data->lock);  in convrate_store()
139 	res = (data->ctrl & LM73_CTRL_RES_MASK) >> LM73_CTRL_RES_SHIFT;  in convrate_show()
150 	mutex_lock(&data->lock);  in maxmin_alarm_show()
151 	ctrl = i2c_smbus_read_byte_data(data->client, LM73_REG_CTRL);  in maxmin_alarm_show()
154 	data->ctrl = ctrl;  in maxmin_alarm_show()
155 	mutex_unlock(&data->lock);  in maxmin_alarm_show()
157 	return sysfs_emit(buf, "%d\n", (ctrl >> attr->index) & 1);  in maxmin_alarm_show()
160 	mutex_unlock(&data->lock);  in maxmin_alarm_show()
164 /*-----------------------------------------------------------------------*/
188 /*-----------------------------------------------------------------------*/
195 	struct device *dev = &client->dev;  in lm73_probe()
202 		return -ENOMEM;  in lm73_probe()
204 	data->client = client;  in lm73_probe()
205 	mutex_init(&data->lock);  in lm73_probe()
210 	data->ctrl = ctrl;  in lm73_probe()
212 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,  in lm73_probe()
217 	dev_info(dev, "sensor '%s'\n", client->name);  in lm73_probe()
228 /* Return 0 if detection is successful, -ENODEV otherwise */
232 	struct i2c_adapter *adapter = new_client->adapter;  in lm73_detect()
237 		return -ENODEV;  in lm73_detect()
245 		return -ENODEV;  in lm73_detect()
249 		return -ENODEV;  in lm73_detect()
253 		return -ENODEV;  in lm73_detect()
258 		return -ENODEV;  in lm73_detect()
260 	strscpy(info->type, "lm73", I2C_NAME_SIZE);  in lm73_detect()