drivers/hwmon/emc6w201.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
3  * emc6w201.c - Hardware monitoring driver for the SMSC EMC6W201
13 #include <linux/hwmon-sysfs.h>
39 enum subfeature { input, min, max };  enumerator
42  * Per-device data
59  * Locking: must be called with data->update_lock held
68 		dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n",  in emc6w201_read16()
77  * Write 16-bit value to LSB and MSB registers
78  * Locking: must be called with data->update_lock held
88 		dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n",  in emc6w201_write16()
94 /* Read 8-bit value from register */
101 		dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n",  in emc6w201_read8()
109 /* Write 8-bit value to register */
116 		dev_err(&client->dev, "%d-bit %s failed at 0x%02x\n",  in emc6w201_write8()
125 	struct i2c_client *client = data->client;  in emc6w201_update_device()
128 	mutex_lock(&data->update_lock);  in emc6w201_update_device()
130 	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {  in emc6w201_update_device()
132 			data->in[input][nr] =  in emc6w201_update_device()
135 			data->in[min][nr] =  in emc6w201_update_device()
138 			data->in[max][nr] =  in emc6w201_update_device()
144 			data->temp[input][nr] =  in emc6w201_update_device()
147 			data->temp[min][nr] =  in emc6w201_update_device()
150 			data->temp[max][nr] =  in emc6w201_update_device()
156 			data->fan[input][nr] =  in emc6w201_update_device()
159 			data->fan[min][nr] =  in emc6w201_update_device()
164 		data->last_updated = jiffies;  in emc6w201_update_device()
165 		data->valid = true;  in emc6w201_update_device()
168 	mutex_unlock(&data->update_lock);  in emc6w201_update_device()
183 	int sf = to_sensor_dev_attr_2(devattr)->index;  in in_show()
184 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in in_show()
187 		       (unsigned)data->in[sf][nr] * nominal_mv[nr] / 0xC0);  in in_show()
194 	struct i2c_client *client = data->client;  in in_store()
195 	int sf = to_sensor_dev_attr_2(devattr)->index;  in in_store()
196 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in in_store()
207 	reg = (sf == min) ? EMC6W201_REG_IN_LOW(nr)  in in_store()
210 	mutex_lock(&data->update_lock);  in in_store()
211 	data->in[sf][nr] = val;  in in_store()
212 	err = emc6w201_write8(client, reg, data->in[sf][nr]);  in in_store()
213 	mutex_unlock(&data->update_lock);  in in_store()
222 	int sf = to_sensor_dev_attr_2(devattr)->index;  in temp_show()
223 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in temp_show()
225 	return sprintf(buf, "%d\n", (int)data->temp[sf][nr] * 1000);  in temp_show()
233 	struct i2c_client *client = data->client;  in temp_store()
234 	int sf = to_sensor_dev_attr_2(devattr)->index;  in temp_store()
235 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in temp_store()
244 	val = clamp_val(val, -127000, 127000);  in temp_store()
246 	reg = (sf == min) ? EMC6W201_REG_TEMP_LOW(nr)  in temp_store()
249 	mutex_lock(&data->update_lock);  in temp_store()
250 	data->temp[sf][nr] = val;  in temp_store()
251 	err = emc6w201_write8(client, reg, data->temp[sf][nr]);  in temp_store()
252 	mutex_unlock(&data->update_lock);  in temp_store()
261 	int sf = to_sensor_dev_attr_2(devattr)->index;  in fan_show()
262 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in fan_show()
265 	if (data->fan[sf][nr] == 0 || data->fan[sf][nr] == 0xFFFF)  in fan_show()
268 		rpm = 5400000U / data->fan[sf][nr];  in fan_show()
277 	struct i2c_client *client = data->client;  in fan_store()
278 	int sf = to_sensor_dev_attr_2(devattr)->index;  in fan_store()
279 	int nr = to_sensor_dev_attr_2(devattr)->nr;  in fan_store()
294 	mutex_lock(&data->update_lock);  in fan_store()
295 	data->fan[sf][nr] = val;  in fan_store()
297 			       data->fan[sf][nr]);  in fan_store()
298 	mutex_unlock(&data->update_lock);  in fan_store()
304 static SENSOR_DEVICE_ATTR_2_RW(in0_min, in, 0, min);
307 static SENSOR_DEVICE_ATTR_2_RW(in1_min, in, 1, min);
310 static SENSOR_DEVICE_ATTR_2_RW(in2_min, in, 2, min);
313 static SENSOR_DEVICE_ATTR_2_RW(in3_min, in, 3, min);
316 static SENSOR_DEVICE_ATTR_2_RW(in4_min, in, 4, min);
319 static SENSOR_DEVICE_ATTR_2_RW(in5_min, in, 5, min);
323 static SENSOR_DEVICE_ATTR_2_RW(temp1_min, temp, 0, min);
326 static SENSOR_DEVICE_ATTR_2_RW(temp2_min, temp, 1, min);
329 static SENSOR_DEVICE_ATTR_2_RW(temp3_min, temp, 2, min);
332 static SENSOR_DEVICE_ATTR_2_RW(temp4_min, temp, 3, min);
335 static SENSOR_DEVICE_ATTR_2_RW(temp5_min, temp, 4, min);
338 static SENSOR_DEVICE_ATTR_2_RW(temp6_min, temp, 5, min);
342 static SENSOR_DEVICE_ATTR_2_RW(fan1_min, fan, 0, min);
344 static SENSOR_DEVICE_ATTR_2_RW(fan2_min, fan, 1, min);
346 static SENSOR_DEVICE_ATTR_2_RW(fan3_min, fan, 2, min);
348 static SENSOR_DEVICE_ATTR_2_RW(fan4_min, fan, 3, min);
350 static SENSOR_DEVICE_ATTR_2_RW(fan5_min, fan, 4, min);
410 /* Return 0 if detection is successful, -ENODEV otherwise */
414 	struct i2c_adapter *adapter = client->adapter;  in emc6w201_detect()
418 		return -ENODEV;  in emc6w201_detect()
423 		return -ENODEV;  in emc6w201_detect()
426 		return -ENODEV;  in emc6w201_detect()
428 		dev_dbg(&client->dev, "Unknown EMC6W201 stepping %d\n",  in emc6w201_detect()
430 		return -ENODEV;  in emc6w201_detect()
436 		return -ENODEV;  in emc6w201_detect()
438 		dev_err(&client->dev, "Monitoring not enabled\n");  in emc6w201_detect()
439 		return -ENODEV;  in emc6w201_detect()
442 	strscpy(info->type, "emc6w201", I2C_NAME_SIZE);  in emc6w201_detect()
449 	struct device *dev = &client->dev;  in emc6w201_probe()
455 		return -ENOMEM;  in emc6w201_probe()
457 	data->client = client;  in emc6w201_probe()
458 	mutex_init(&data->update_lock);  in emc6w201_probe()
460 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,  in emc6w201_probe()