1 // SPDX-License-Identifier: GPL-2.0-or-later
18 #include <linux/hwmon-sysfs.h>
27  * status reporting commands are non-standard. For this reason, a standard
30  * All Lineage CPL devices have a built-in I2C bus master selector (PCA9541).
58 /* Virtual entries, to report constants */
140 		result = -EIO;  in pem_read_block()
152 	struct i2c_client *client = data->client;  in pem_update_device()
155 	mutex_lock(&data->update_lock);  in pem_update_device()
157 	if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {  in pem_update_device()
162 					data->data_string,  in pem_update_device()
163 					sizeof(data->data_string));  in pem_update_device()
170 		if (data->input_length) {  in pem_update_device()
172 						data->input_string,  in pem_update_device()
173 						data->input_length);  in pem_update_device()
181 		if (data->fans_supported) {  in pem_update_device()
183 						data->fan_speed,  in pem_update_device()
184 						sizeof(data->fan_speed));  in pem_update_device()
193 		data->last_updated = jiffies;  in pem_update_device()
194 		data->valid = true;  in pem_update_device()
197 	mutex_unlock(&data->update_lock);  in pem_update_device()
235 			val = (data[index] + (data[index+1] << 8) - 75) * 1000;  in pem_get_input()
237 			val = (data[index] - 75) * 1000;  in pem_get_input()
282 	status = data->data_string[attr->nr] & attr->index;  in pem_bool_show()
296 	value = pem_get_data(data->data_string, sizeof(data->data_string),  in pem_data_show()
297 			     attr->index);  in pem_data_show()
312 	value = pem_get_input(data->input_string, sizeof(data->input_string),  in pem_input_show()
313 			      attr->index);  in pem_input_show()
328 	value = pem_get_fan(data->fan_speed, sizeof(data->fan_speed),  in pem_fan_show()
329 			    attr->index);  in pem_fan_show()
422 	struct i2c_adapter *adapter = client->adapter;  in pem_probe()
423 	struct device *dev = &client->dev;  in pem_probe()
430 		return -ENODEV;  in pem_probe()
434 		return -ENOMEM;  in pem_probe()
436 	data->client = client;  in pem_probe()
437 	mutex_init(&data->update_lock);  in pem_probe()
444 			     data->firmware_rev, sizeof(data->firmware_rev));  in pem_probe()
453 		 data->firmware_rev[0], data->firmware_rev[1],  in pem_probe()
454 		 data->firmware_rev[2]);  in pem_probe()
457 	data->groups[idx++] = &pem_group;  in pem_probe()
466 			     data->input_string,  in pem_probe()
467 			     sizeof(data->input_string) - 1);  in pem_probe()
468 	if (!ret && (data->input_string[0] || data->input_string[1] ||  in pem_probe()
469 		     data->input_string[2]))  in pem_probe()
470 		data->input_length = sizeof(data->input_string) - 1;  in pem_probe()
474 				    data->input_string,  in pem_probe()
475 				    sizeof(data->input_string));  in pem_probe()
476 		if (!ret && (data->input_string[0] || data->input_string[1] ||  in pem_probe()
477 			    data->input_string[2] || data->input_string[3]))  in pem_probe()
478 			data->input_length = sizeof(data->input_string);  in pem_probe()
481 	if (data->input_length)  in pem_probe()
482 		data->groups[idx++] = &pem_input_group;  in pem_probe()
485 	 * Check if fan speed readings are supported.  in pem_probe()
486 	 * This is the case if we can read fan speed data,  in pem_probe()
491 			     data->fan_speed,  in pem_probe()
492 			     sizeof(data->fan_speed));  in pem_probe()
493 	if (!ret && (data->fan_speed[0] || data->fan_speed[1] ||  in pem_probe()
494 		     data->fan_speed[2] || data->fan_speed[3])) {  in pem_probe()
495 		data->fans_supported = true;  in pem_probe()
496 		data->groups[idx++] = &pem_fan_group;  in pem_probe()
499 	hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,  in pem_probe()
500 							   data, data->groups);  in pem_probe()
520 MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");