2 * hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring
4 * This file defines the sysfs class "hwmon", for use by sensors drivers.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2 of the License.
13 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #include <linux/bitops.h>
16 #include <linux/device.h>
17 #include <linux/err.h>
18 #include <linux/gfp.h>
19 #include <linux/hwmon.h>
20 #include <linux/idr.h>
21 #include <linux/module.h>
22 #include <linux/pci.h>
23 #include <linux/slab.h>
24 #include <linux/string.h>
25 #include <linux/thermal.h>
27 #define HWMON_ID_PREFIX "hwmon"
28 #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
33 const struct hwmon_chip_info *chip;
35 struct attribute_group group;
36 const struct attribute_group **groups;
39 #define to_hwmon_device(d) container_of(d, struct hwmon_device, dev)
41 #define MAX_SYSFS_ATTR_NAME_LENGTH 32
43 struct hwmon_device_attribute {
44 struct device_attribute dev_attr;
45 const struct hwmon_ops *ops;
46 enum hwmon_sensor_types type;
49 char name[MAX_SYSFS_ATTR_NAME_LENGTH];
52 #define to_hwmon_attr(d) \
53 container_of(d, struct hwmon_device_attribute, dev_attr)
56 * Thermal zone information
57 * In addition to the reference to the hwmon device,
58 * also provides the sensor index.
60 struct hwmon_thermal_data {
61 struct hwmon_device *hwdev; /* Reference to hwmon device */
62 int index; /* sensor index */
66 name_show(struct device *dev, struct device_attribute *attr, char *buf)
68 return sprintf(buf, "%s\n", to_hwmon_device(dev)->name);
70 static DEVICE_ATTR_RO(name);
72 static struct attribute *hwmon_dev_attrs[] = {
77 static umode_t hwmon_dev_name_is_visible(struct kobject *kobj,
78 struct attribute *attr, int n)
80 struct device *dev = container_of(kobj, struct device, kobj);
82 if (to_hwmon_device(dev)->name == NULL)
88 static struct attribute_group hwmon_dev_attr_group = {
89 .attrs = hwmon_dev_attrs,
90 .is_visible = hwmon_dev_name_is_visible,
93 static const struct attribute_group *hwmon_dev_attr_groups[] = {
94 &hwmon_dev_attr_group,
98 static void hwmon_dev_release(struct device *dev)
100 kfree(to_hwmon_device(dev));
103 static struct class hwmon_class = {
105 .owner = THIS_MODULE,
106 .dev_groups = hwmon_dev_attr_groups,
107 .dev_release = hwmon_dev_release,
110 static DEFINE_IDA(hwmon_ida);
112 /* Thermal zone handling */
115 * The complex conditional is necessary to avoid a cyclic dependency
116 * between hwmon and thermal_sys modules.
118 #if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \
119 (!defined(CONFIG_THERMAL_HWMON) || \
120 !(defined(MODULE) && IS_MODULE(CONFIG_THERMAL)))
121 static int hwmon_thermal_get_temp(void *data, int *temp)
123 struct hwmon_thermal_data *tdata = data;
124 struct hwmon_device *hwdev = tdata->hwdev;
128 ret = hwdev->chip->ops->read(&hwdev->dev, hwmon_temp, hwmon_temp_input,
138 static struct thermal_zone_of_device_ops hwmon_thermal_ops = {
139 .get_temp = hwmon_thermal_get_temp,
142 static int hwmon_thermal_add_sensor(struct device *dev,
143 struct hwmon_device *hwdev, int index)
145 struct hwmon_thermal_data *tdata;
147 tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL);
151 tdata->hwdev = hwdev;
152 tdata->index = index;
154 devm_thermal_zone_of_sensor_register(&hwdev->dev, index, tdata,
160 static int hwmon_thermal_add_sensor(struct device *dev,
161 struct hwmon_device *hwdev, int index)
165 #endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */
167 /* sysfs attribute management */
169 static ssize_t hwmon_attr_show(struct device *dev,
170 struct device_attribute *devattr, char *buf)
172 struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
176 ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index,
181 return sprintf(buf, "%ld\n", val);
184 static ssize_t hwmon_attr_show_string(struct device *dev,
185 struct device_attribute *devattr,
188 struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
192 ret = hattr->ops->read_string(dev, hattr->type, hattr->attr,
197 return sprintf(buf, "%s\n", s);
200 static ssize_t hwmon_attr_store(struct device *dev,
201 struct device_attribute *devattr,
202 const char *buf, size_t count)
204 struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
208 ret = kstrtol(buf, 10, &val);
212 ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index,
220 static int hwmon_attr_base(enum hwmon_sensor_types type)
222 if (type == hwmon_in)
227 static bool is_string_attr(enum hwmon_sensor_types type, u32 attr)
229 return (type == hwmon_temp && attr == hwmon_temp_label) ||
230 (type == hwmon_in && attr == hwmon_in_label) ||
231 (type == hwmon_curr && attr == hwmon_curr_label) ||
232 (type == hwmon_power && attr == hwmon_power_label) ||
233 (type == hwmon_energy && attr == hwmon_energy_label) ||
234 (type == hwmon_humidity && attr == hwmon_humidity_label) ||
235 (type == hwmon_fan && attr == hwmon_fan_label);
238 static struct attribute *hwmon_genattr(struct device *dev,
240 enum hwmon_sensor_types type,
243 const char *template,
244 const struct hwmon_ops *ops)
246 struct hwmon_device_attribute *hattr;
247 struct device_attribute *dattr;
251 bool is_string = is_string_attr(type, attr);
253 /* The attribute is invisible if there is no template string */
255 return ERR_PTR(-ENOENT);
257 mode = ops->is_visible(drvdata, type, attr, index);
259 return ERR_PTR(-ENOENT);
261 if ((mode & S_IRUGO) && ((is_string && !ops->read_string) ||
262 (!is_string && !ops->read)))
263 return ERR_PTR(-EINVAL);
264 if ((mode & S_IWUGO) && !ops->write)
265 return ERR_PTR(-EINVAL);
267 hattr = devm_kzalloc(dev, sizeof(*hattr), GFP_KERNEL);
269 return ERR_PTR(-ENOMEM);
271 if (type == hwmon_chip) {
272 name = (char *)template;
274 scnprintf(hattr->name, sizeof(hattr->name), template,
275 index + hwmon_attr_base(type));
281 hattr->index = index;
284 dattr = &hattr->dev_attr;
285 dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show;
286 dattr->store = hwmon_attr_store;
297 * Chip attributes are not attribute templates but actual sysfs attributes.
298 * See hwmon_genattr() for special handling.
300 static const char * const hwmon_chip_attrs[] = {
301 [hwmon_chip_temp_reset_history] = "temp_reset_history",
302 [hwmon_chip_in_reset_history] = "in_reset_history",
303 [hwmon_chip_curr_reset_history] = "curr_reset_history",
304 [hwmon_chip_power_reset_history] = "power_reset_history",
305 [hwmon_chip_update_interval] = "update_interval",
306 [hwmon_chip_alarms] = "alarms",
309 static const char * const hwmon_temp_attr_templates[] = {
310 [hwmon_temp_input] = "temp%d_input",
311 [hwmon_temp_type] = "temp%d_type",
312 [hwmon_temp_lcrit] = "temp%d_lcrit",
313 [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst",
314 [hwmon_temp_min] = "temp%d_min",
315 [hwmon_temp_min_hyst] = "temp%d_min_hyst",
316 [hwmon_temp_max] = "temp%d_max",
317 [hwmon_temp_max_hyst] = "temp%d_max_hyst",
318 [hwmon_temp_crit] = "temp%d_crit",
319 [hwmon_temp_crit_hyst] = "temp%d_crit_hyst",
320 [hwmon_temp_emergency] = "temp%d_emergency",
321 [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst",
322 [hwmon_temp_alarm] = "temp%d_alarm",
323 [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm",
324 [hwmon_temp_min_alarm] = "temp%d_min_alarm",
325 [hwmon_temp_max_alarm] = "temp%d_max_alarm",
326 [hwmon_temp_crit_alarm] = "temp%d_crit_alarm",
327 [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm",
328 [hwmon_temp_fault] = "temp%d_fault",
329 [hwmon_temp_offset] = "temp%d_offset",
330 [hwmon_temp_label] = "temp%d_label",
331 [hwmon_temp_lowest] = "temp%d_lowest",
332 [hwmon_temp_highest] = "temp%d_highest",
333 [hwmon_temp_reset_history] = "temp%d_reset_history",
336 static const char * const hwmon_in_attr_templates[] = {
337 [hwmon_in_input] = "in%d_input",
338 [hwmon_in_min] = "in%d_min",
339 [hwmon_in_max] = "in%d_max",
340 [hwmon_in_lcrit] = "in%d_lcrit",
341 [hwmon_in_crit] = "in%d_crit",
342 [hwmon_in_average] = "in%d_average",
343 [hwmon_in_lowest] = "in%d_lowest",
344 [hwmon_in_highest] = "in%d_highest",
345 [hwmon_in_reset_history] = "in%d_reset_history",
346 [hwmon_in_label] = "in%d_label",
347 [hwmon_in_alarm] = "in%d_alarm",
348 [hwmon_in_min_alarm] = "in%d_min_alarm",
349 [hwmon_in_max_alarm] = "in%d_max_alarm",
350 [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm",
351 [hwmon_in_crit_alarm] = "in%d_crit_alarm",
354 static const char * const hwmon_curr_attr_templates[] = {
355 [hwmon_curr_input] = "curr%d_input",
356 [hwmon_curr_min] = "curr%d_min",
357 [hwmon_curr_max] = "curr%d_max",
358 [hwmon_curr_lcrit] = "curr%d_lcrit",
359 [hwmon_curr_crit] = "curr%d_crit",
360 [hwmon_curr_average] = "curr%d_average",
361 [hwmon_curr_lowest] = "curr%d_lowest",
362 [hwmon_curr_highest] = "curr%d_highest",
363 [hwmon_curr_reset_history] = "curr%d_reset_history",
364 [hwmon_curr_label] = "curr%d_label",
365 [hwmon_curr_alarm] = "curr%d_alarm",
366 [hwmon_curr_min_alarm] = "curr%d_min_alarm",
367 [hwmon_curr_max_alarm] = "curr%d_max_alarm",
368 [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm",
369 [hwmon_curr_crit_alarm] = "curr%d_crit_alarm",
372 static const char * const hwmon_power_attr_templates[] = {
373 [hwmon_power_average] = "power%d_average",
374 [hwmon_power_average_interval] = "power%d_average_interval",
375 [hwmon_power_average_interval_max] = "power%d_interval_max",
376 [hwmon_power_average_interval_min] = "power%d_interval_min",
377 [hwmon_power_average_highest] = "power%d_average_highest",
378 [hwmon_power_average_lowest] = "power%d_average_lowest",
379 [hwmon_power_average_max] = "power%d_average_max",
380 [hwmon_power_average_min] = "power%d_average_min",
381 [hwmon_power_input] = "power%d_input",
382 [hwmon_power_input_highest] = "power%d_input_highest",
383 [hwmon_power_input_lowest] = "power%d_input_lowest",
384 [hwmon_power_reset_history] = "power%d_reset_history",
385 [hwmon_power_accuracy] = "power%d_accuracy",
386 [hwmon_power_cap] = "power%d_cap",
387 [hwmon_power_cap_hyst] = "power%d_cap_hyst",
388 [hwmon_power_cap_max] = "power%d_cap_max",
389 [hwmon_power_cap_min] = "power%d_cap_min",
390 [hwmon_power_max] = "power%d_max",
391 [hwmon_power_crit] = "power%d_crit",
392 [hwmon_power_label] = "power%d_label",
393 [hwmon_power_alarm] = "power%d_alarm",
394 [hwmon_power_cap_alarm] = "power%d_cap_alarm",
395 [hwmon_power_max_alarm] = "power%d_max_alarm",
396 [hwmon_power_crit_alarm] = "power%d_crit_alarm",
399 static const char * const hwmon_energy_attr_templates[] = {
400 [hwmon_energy_input] = "energy%d_input",
401 [hwmon_energy_label] = "energy%d_label",
404 static const char * const hwmon_humidity_attr_templates[] = {
405 [hwmon_humidity_input] = "humidity%d_input",
406 [hwmon_humidity_label] = "humidity%d_label",
407 [hwmon_humidity_min] = "humidity%d_min",
408 [hwmon_humidity_min_hyst] = "humidity%d_min_hyst",
409 [hwmon_humidity_max] = "humidity%d_max",
410 [hwmon_humidity_max_hyst] = "humidity%d_max_hyst",
411 [hwmon_humidity_alarm] = "humidity%d_alarm",
412 [hwmon_humidity_fault] = "humidity%d_fault",
415 static const char * const hwmon_fan_attr_templates[] = {
416 [hwmon_fan_input] = "fan%d_input",
417 [hwmon_fan_label] = "fan%d_label",
418 [hwmon_fan_min] = "fan%d_min",
419 [hwmon_fan_max] = "fan%d_max",
420 [hwmon_fan_div] = "fan%d_div",
421 [hwmon_fan_pulses] = "fan%d_pulses",
422 [hwmon_fan_target] = "fan%d_target",
423 [hwmon_fan_alarm] = "fan%d_alarm",
424 [hwmon_fan_min_alarm] = "fan%d_min_alarm",
425 [hwmon_fan_max_alarm] = "fan%d_max_alarm",
426 [hwmon_fan_fault] = "fan%d_fault",
429 static const char * const hwmon_pwm_attr_templates[] = {
430 [hwmon_pwm_input] = "pwm%d",
431 [hwmon_pwm_enable] = "pwm%d_enable",
432 [hwmon_pwm_mode] = "pwm%d_mode",
433 [hwmon_pwm_freq] = "pwm%d_freq",
436 static const char * const *__templates[] = {
437 [hwmon_chip] = hwmon_chip_attrs,
438 [hwmon_temp] = hwmon_temp_attr_templates,
439 [hwmon_in] = hwmon_in_attr_templates,
440 [hwmon_curr] = hwmon_curr_attr_templates,
441 [hwmon_power] = hwmon_power_attr_templates,
442 [hwmon_energy] = hwmon_energy_attr_templates,
443 [hwmon_humidity] = hwmon_humidity_attr_templates,
444 [hwmon_fan] = hwmon_fan_attr_templates,
445 [hwmon_pwm] = hwmon_pwm_attr_templates,
448 static const int __templates_size[] = {
449 [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attrs),
450 [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates),
451 [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates),
452 [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates),
453 [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates),
454 [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates),
455 [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates),
456 [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates),
457 [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates),
460 static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info)
464 for (i = n = 0; info->config[i]; i++)
465 n += hweight32(info->config[i]);
470 static int hwmon_genattrs(struct device *dev,
472 struct attribute **attrs,
473 const struct hwmon_ops *ops,
474 const struct hwmon_channel_info *info)
476 const char * const *templates;
480 if (info->type >= ARRAY_SIZE(__templates))
483 templates = __templates[info->type];
484 template_size = __templates_size[info->type];
486 for (i = 0; info->config[i]; i++) {
487 u32 attr_mask = info->config[i];
493 attr = __ffs(attr_mask);
494 attr_mask &= ~BIT(attr);
495 if (attr >= template_size)
497 a = hwmon_genattr(dev, drvdata, info->type, attr, i,
498 templates[attr], ops);
500 if (PTR_ERR(a) != -ENOENT)
510 static struct attribute **
511 __hwmon_create_attrs(struct device *dev, const void *drvdata,
512 const struct hwmon_chip_info *chip)
514 int ret, i, aindex = 0, nattrs = 0;
515 struct attribute **attrs;
517 for (i = 0; chip->info[i]; i++)
518 nattrs += hwmon_num_channel_attrs(chip->info[i]);
521 return ERR_PTR(-EINVAL);
523 attrs = devm_kcalloc(dev, nattrs + 1, sizeof(*attrs), GFP_KERNEL);
525 return ERR_PTR(-ENOMEM);
527 for (i = 0; chip->info[i]; i++) {
528 ret = hwmon_genattrs(dev, drvdata, &attrs[aindex], chip->ops,
538 static struct device *
539 __hwmon_device_register(struct device *dev, const char *name, void *drvdata,
540 const struct hwmon_chip_info *chip,
541 const struct attribute_group **groups)
543 struct hwmon_device *hwdev;
547 /* Complain about invalid characters in hwmon name attribute */
548 if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
550 "hwmon: '%s' is not a valid name attribute, please fix\n",
553 id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
557 hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL);
566 struct attribute **attrs;
567 int ngroups = 2; /* terminating NULL plus &hwdev->groups */
570 for (i = 0; groups[i]; i++)
573 hwdev->groups = devm_kcalloc(dev, ngroups, sizeof(*groups),
575 if (!hwdev->groups) {
580 attrs = __hwmon_create_attrs(dev, drvdata, chip);
582 err = PTR_ERR(attrs);
586 hwdev->group.attrs = attrs;
588 hwdev->groups[ngroups++] = &hwdev->group;
591 for (i = 0; groups[i]; i++)
592 hwdev->groups[ngroups++] = groups[i];
595 hdev->groups = hwdev->groups;
597 hdev->groups = groups;
601 hdev->class = &hwmon_class;
603 hdev->of_node = dev ? dev->of_node : NULL;
605 dev_set_drvdata(hdev, drvdata);
606 dev_set_name(hdev, HWMON_ID_FORMAT, id);
607 err = device_register(hdev);
611 if (dev && chip && chip->ops->read &&
612 chip->info[0]->type == hwmon_chip &&
613 (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) {
614 const struct hwmon_channel_info **info = chip->info;
616 for (i = 1; info[i]; i++) {
617 if (info[i]->type != hwmon_temp)
620 for (j = 0; info[i]->config[j]; j++) {
621 if (!chip->ops->is_visible(drvdata, hwmon_temp,
622 hwmon_temp_input, j))
624 if (info[i]->config[j] & HWMON_T_INPUT)
625 hwmon_thermal_add_sensor(dev, hwdev, j);
635 ida_simple_remove(&hwmon_ida, id);
640 * hwmon_device_register_with_groups - register w/ hwmon
641 * @dev: the parent device
642 * @name: hwmon name attribute
643 * @drvdata: driver data to attach to created device
644 * @groups: List of attribute groups to create
646 * hwmon_device_unregister() must be called when the device is no
649 * Returns the pointer to the new device.
652 hwmon_device_register_with_groups(struct device *dev, const char *name,
654 const struct attribute_group **groups)
657 return ERR_PTR(-EINVAL);
659 return __hwmon_device_register(dev, name, drvdata, NULL, groups);
661 EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups);
664 * hwmon_device_register_with_info - register w/ hwmon
665 * @dev: the parent device
666 * @name: hwmon name attribute
667 * @drvdata: driver data to attach to created device
668 * @info: pointer to hwmon chip information
669 * @extra_groups: pointer to list of additional non-standard attribute groups
671 * hwmon_device_unregister() must be called when the device is no
674 * Returns the pointer to the new device.
677 hwmon_device_register_with_info(struct device *dev, const char *name,
679 const struct hwmon_chip_info *chip,
680 const struct attribute_group **extra_groups)
683 return ERR_PTR(-EINVAL);
685 if (chip && (!chip->ops || !chip->ops->is_visible || !chip->info))
686 return ERR_PTR(-EINVAL);
688 return __hwmon_device_register(dev, name, drvdata, chip, extra_groups);
690 EXPORT_SYMBOL_GPL(hwmon_device_register_with_info);
693 * hwmon_device_register - register w/ hwmon
694 * @dev: the device to register
696 * hwmon_device_unregister() must be called when the device is no
699 * Returns the pointer to the new device.
701 struct device *hwmon_device_register(struct device *dev)
704 "hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().\n");
706 return __hwmon_device_register(dev, NULL, NULL, NULL, NULL);
708 EXPORT_SYMBOL_GPL(hwmon_device_register);
711 * hwmon_device_unregister - removes the previously registered class device
713 * @dev: the class device to destroy
715 void hwmon_device_unregister(struct device *dev)
719 if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) {
720 device_unregister(dev);
721 ida_simple_remove(&hwmon_ida, id);
724 "hwmon_device_unregister() failed: bad class ID!\n");
726 EXPORT_SYMBOL_GPL(hwmon_device_unregister);
728 static void devm_hwmon_release(struct device *dev, void *res)
730 struct device *hwdev = *(struct device **)res;
732 hwmon_device_unregister(hwdev);
736 * devm_hwmon_device_register_with_groups - register w/ hwmon
737 * @dev: the parent device
738 * @name: hwmon name attribute
739 * @drvdata: driver data to attach to created device
740 * @groups: List of attribute groups to create
742 * Returns the pointer to the new device. The new device is automatically
743 * unregistered with the parent device.
746 devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
748 const struct attribute_group **groups)
750 struct device **ptr, *hwdev;
753 return ERR_PTR(-EINVAL);
755 ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL);
757 return ERR_PTR(-ENOMEM);
759 hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups);
764 devres_add(dev, ptr);
771 EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups);
774 * devm_hwmon_device_register_with_info - register w/ hwmon
775 * @dev: the parent device
776 * @name: hwmon name attribute
777 * @drvdata: driver data to attach to created device
778 * @info: Pointer to hwmon chip information
779 * @groups - pointer to list of driver specific attribute groups
781 * Returns the pointer to the new device. The new device is automatically
782 * unregistered with the parent device.
785 devm_hwmon_device_register_with_info(struct device *dev, const char *name,
787 const struct hwmon_chip_info *chip,
788 const struct attribute_group **groups)
790 struct device **ptr, *hwdev;
793 return ERR_PTR(-EINVAL);
795 ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL);
797 return ERR_PTR(-ENOMEM);
799 hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip,
805 devres_add(dev, ptr);
813 EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info);
815 static int devm_hwmon_match(struct device *dev, void *res, void *data)
817 struct device **hwdev = res;
819 return *hwdev == data;
823 * devm_hwmon_device_unregister - removes a previously registered hwmon device
825 * @dev: the parent device of the device to unregister
827 void devm_hwmon_device_unregister(struct device *dev)
829 WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev));
831 EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister);
833 static void __init hwmon_pci_quirks(void)
835 #if defined CONFIG_X86 && defined CONFIG_PCI
840 /* Open access to 0x295-0x296 on MSI MS-7031 */
841 sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL);
843 if (sb->subsystem_vendor == 0x1462 && /* MSI */
844 sb->subsystem_device == 0x0031) { /* MS-7031 */
845 pci_read_config_byte(sb, 0x48, &enable);
846 pci_read_config_word(sb, 0x64, &base);
848 if (base == 0 && !(enable & BIT(2))) {
850 "Opening wide generic port at 0x295\n");
851 pci_write_config_word(sb, 0x64, 0x295);
852 pci_write_config_byte(sb, 0x48,
861 static int __init hwmon_init(void)
867 err = class_register(&hwmon_class);
869 pr_err("couldn't register hwmon sysfs class\n");
875 static void __exit hwmon_exit(void)
877 class_unregister(&hwmon_class);
880 subsys_initcall(hwmon_init);
881 module_exit(hwmon_exit);
884 MODULE_DESCRIPTION("hardware monitoring sysfs/class support");
885 MODULE_LICENSE("GPL");