v4.19.13 snapshot.
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
new file mode 100644
index 0000000..fcdbac4
--- /dev/null
+++ b/drivers/hwmon/hwmon.c
@@ -0,0 +1,906 @@
+/*
+ * hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring
+ *
+ * This file defines the sysfs class "hwmon", for use by sensors drivers.
+ *
+ * Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gfp.h>
+#include <linux/hwmon.h>
+#include <linux/idr.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/thermal.h>
+
+#define HWMON_ID_PREFIX "hwmon"
+#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d"
+
+struct hwmon_device {
+ const char *name;
+ struct device dev;
+ const struct hwmon_chip_info *chip;
+
+ struct attribute_group group;
+ const struct attribute_group **groups;
+};
+
+#define to_hwmon_device(d) container_of(d, struct hwmon_device, dev)
+
+#define MAX_SYSFS_ATTR_NAME_LENGTH 32
+
+struct hwmon_device_attribute {
+ struct device_attribute dev_attr;
+ const struct hwmon_ops *ops;
+ enum hwmon_sensor_types type;
+ u32 attr;
+ int index;
+ char name[MAX_SYSFS_ATTR_NAME_LENGTH];
+};
+
+#define to_hwmon_attr(d) \
+ container_of(d, struct hwmon_device_attribute, dev_attr)
+
+/*
+ * Thermal zone information
+ * In addition to the reference to the hwmon device,
+ * also provides the sensor index.
+ */
+struct hwmon_thermal_data {
+ struct hwmon_device *hwdev; /* Reference to hwmon device */
+ int index; /* sensor index */
+};
+
+static ssize_t
+name_show(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ return sprintf(buf, "%s\n", to_hwmon_device(dev)->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static struct attribute *hwmon_dev_attrs[] = {
+ &dev_attr_name.attr,
+ NULL
+};
+
+static umode_t hwmon_dev_name_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+
+ if (to_hwmon_device(dev)->name == NULL)
+ return 0;
+
+ return attr->mode;
+}
+
+static const struct attribute_group hwmon_dev_attr_group = {
+ .attrs = hwmon_dev_attrs,
+ .is_visible = hwmon_dev_name_is_visible,
+};
+
+static const struct attribute_group *hwmon_dev_attr_groups[] = {
+ &hwmon_dev_attr_group,
+ NULL
+};
+
+static void hwmon_dev_release(struct device *dev)
+{
+ kfree(to_hwmon_device(dev));
+}
+
+static struct class hwmon_class = {
+ .name = "hwmon",
+ .owner = THIS_MODULE,
+ .dev_groups = hwmon_dev_attr_groups,
+ .dev_release = hwmon_dev_release,
+};
+
+static DEFINE_IDA(hwmon_ida);
+
+/* Thermal zone handling */
+
+/*
+ * The complex conditional is necessary to avoid a cyclic dependency
+ * between hwmon and thermal_sys modules.
+ */
+#if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \
+ (!defined(CONFIG_THERMAL_HWMON) || \
+ !(defined(MODULE) && IS_MODULE(CONFIG_THERMAL)))
+static int hwmon_thermal_get_temp(void *data, int *temp)
+{
+ struct hwmon_thermal_data *tdata = data;
+ struct hwmon_device *hwdev = tdata->hwdev;
+ int ret;
+ long t;
+
+ ret = hwdev->chip->ops->read(&hwdev->dev, hwmon_temp, hwmon_temp_input,
+ tdata->index, &t);
+ if (ret < 0)
+ return ret;
+
+ *temp = t;
+
+ return 0;
+}
+
+static const struct thermal_zone_of_device_ops hwmon_thermal_ops = {
+ .get_temp = hwmon_thermal_get_temp,
+};
+
+static int hwmon_thermal_add_sensor(struct device *dev,
+ struct hwmon_device *hwdev, int index)
+{
+ struct hwmon_thermal_data *tdata;
+ struct thermal_zone_device *tzd;
+
+ tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL);
+ if (!tdata)
+ return -ENOMEM;
+
+ tdata->hwdev = hwdev;
+ tdata->index = index;
+
+ tzd = devm_thermal_zone_of_sensor_register(&hwdev->dev, index, tdata,
+ &hwmon_thermal_ops);
+ /*
+ * If CONFIG_THERMAL_OF is disabled, this returns -ENODEV,
+ * so ignore that error but forward any other error.
+ */
+ if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV))
+ return PTR_ERR(tzd);
+
+ return 0;
+}
+#else
+static int hwmon_thermal_add_sensor(struct device *dev,
+ struct hwmon_device *hwdev, int index)
+{
+ return 0;
+}
+#endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */
+
+/* sysfs attribute management */
+
+static ssize_t hwmon_attr_show(struct device *dev,
+ struct device_attribute *devattr, char *buf)
+{
+ struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
+ long val;
+ int ret;
+
+ ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index,
+ &val);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%ld\n", val);
+}
+
+static ssize_t hwmon_attr_show_string(struct device *dev,
+ struct device_attribute *devattr,
+ char *buf)
+{
+ struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
+ const char *s;
+ int ret;
+
+ ret = hattr->ops->read_string(dev, hattr->type, hattr->attr,
+ hattr->index, &s);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%s\n", s);
+}
+
+static ssize_t hwmon_attr_store(struct device *dev,
+ struct device_attribute *devattr,
+ const char *buf, size_t count)
+{
+ struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr);
+ long val;
+ int ret;
+
+ ret = kstrtol(buf, 10, &val);
+ if (ret < 0)
+ return ret;
+
+ ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index,
+ val);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static int hwmon_attr_base(enum hwmon_sensor_types type)
+{
+ if (type == hwmon_in)
+ return 0;
+ return 1;
+}
+
+static bool is_string_attr(enum hwmon_sensor_types type, u32 attr)
+{
+ return (type == hwmon_temp && attr == hwmon_temp_label) ||
+ (type == hwmon_in && attr == hwmon_in_label) ||
+ (type == hwmon_curr && attr == hwmon_curr_label) ||
+ (type == hwmon_power && attr == hwmon_power_label) ||
+ (type == hwmon_energy && attr == hwmon_energy_label) ||
+ (type == hwmon_humidity && attr == hwmon_humidity_label) ||
+ (type == hwmon_fan && attr == hwmon_fan_label);
+}
+
+static struct attribute *hwmon_genattr(struct device *dev,
+ const void *drvdata,
+ enum hwmon_sensor_types type,
+ u32 attr,
+ int index,
+ const char *template,
+ const struct hwmon_ops *ops)
+{
+ struct hwmon_device_attribute *hattr;
+ struct device_attribute *dattr;
+ struct attribute *a;
+ umode_t mode;
+ char *name;
+ bool is_string = is_string_attr(type, attr);
+
+ /* The attribute is invisible if there is no template string */
+ if (!template)
+ return ERR_PTR(-ENOENT);
+
+ mode = ops->is_visible(drvdata, type, attr, index);
+ if (!mode)
+ return ERR_PTR(-ENOENT);
+
+ if ((mode & S_IRUGO) && ((is_string && !ops->read_string) ||
+ (!is_string && !ops->read)))
+ return ERR_PTR(-EINVAL);
+ if ((mode & S_IWUGO) && !ops->write)
+ return ERR_PTR(-EINVAL);
+
+ hattr = devm_kzalloc(dev, sizeof(*hattr), GFP_KERNEL);
+ if (!hattr)
+ return ERR_PTR(-ENOMEM);
+
+ if (type == hwmon_chip) {
+ name = (char *)template;
+ } else {
+ scnprintf(hattr->name, sizeof(hattr->name), template,
+ index + hwmon_attr_base(type));
+ name = hattr->name;
+ }
+
+ hattr->type = type;
+ hattr->attr = attr;
+ hattr->index = index;
+ hattr->ops = ops;
+
+ dattr = &hattr->dev_attr;
+ dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show;
+ dattr->store = hwmon_attr_store;
+
+ a = &dattr->attr;
+ sysfs_attr_init(a);
+ a->name = name;
+ a->mode = mode;
+
+ return a;
+}
+
+/*
+ * Chip attributes are not attribute templates but actual sysfs attributes.
+ * See hwmon_genattr() for special handling.
+ */
+static const char * const hwmon_chip_attrs[] = {
+ [hwmon_chip_temp_reset_history] = "temp_reset_history",
+ [hwmon_chip_in_reset_history] = "in_reset_history",
+ [hwmon_chip_curr_reset_history] = "curr_reset_history",
+ [hwmon_chip_power_reset_history] = "power_reset_history",
+ [hwmon_chip_update_interval] = "update_interval",
+ [hwmon_chip_alarms] = "alarms",
+};
+
+static const char * const hwmon_temp_attr_templates[] = {
+ [hwmon_temp_input] = "temp%d_input",
+ [hwmon_temp_type] = "temp%d_type",
+ [hwmon_temp_lcrit] = "temp%d_lcrit",
+ [hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst",
+ [hwmon_temp_min] = "temp%d_min",
+ [hwmon_temp_min_hyst] = "temp%d_min_hyst",
+ [hwmon_temp_max] = "temp%d_max",
+ [hwmon_temp_max_hyst] = "temp%d_max_hyst",
+ [hwmon_temp_crit] = "temp%d_crit",
+ [hwmon_temp_crit_hyst] = "temp%d_crit_hyst",
+ [hwmon_temp_emergency] = "temp%d_emergency",
+ [hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst",
+ [hwmon_temp_alarm] = "temp%d_alarm",
+ [hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm",
+ [hwmon_temp_min_alarm] = "temp%d_min_alarm",
+ [hwmon_temp_max_alarm] = "temp%d_max_alarm",
+ [hwmon_temp_crit_alarm] = "temp%d_crit_alarm",
+ [hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm",
+ [hwmon_temp_fault] = "temp%d_fault",
+ [hwmon_temp_offset] = "temp%d_offset",
+ [hwmon_temp_label] = "temp%d_label",
+ [hwmon_temp_lowest] = "temp%d_lowest",
+ [hwmon_temp_highest] = "temp%d_highest",
+ [hwmon_temp_reset_history] = "temp%d_reset_history",
+};
+
+static const char * const hwmon_in_attr_templates[] = {
+ [hwmon_in_input] = "in%d_input",
+ [hwmon_in_min] = "in%d_min",
+ [hwmon_in_max] = "in%d_max",
+ [hwmon_in_lcrit] = "in%d_lcrit",
+ [hwmon_in_crit] = "in%d_crit",
+ [hwmon_in_average] = "in%d_average",
+ [hwmon_in_lowest] = "in%d_lowest",
+ [hwmon_in_highest] = "in%d_highest",
+ [hwmon_in_reset_history] = "in%d_reset_history",
+ [hwmon_in_label] = "in%d_label",
+ [hwmon_in_alarm] = "in%d_alarm",
+ [hwmon_in_min_alarm] = "in%d_min_alarm",
+ [hwmon_in_max_alarm] = "in%d_max_alarm",
+ [hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm",
+ [hwmon_in_crit_alarm] = "in%d_crit_alarm",
+};
+
+static const char * const hwmon_curr_attr_templates[] = {
+ [hwmon_curr_input] = "curr%d_input",
+ [hwmon_curr_min] = "curr%d_min",
+ [hwmon_curr_max] = "curr%d_max",
+ [hwmon_curr_lcrit] = "curr%d_lcrit",
+ [hwmon_curr_crit] = "curr%d_crit",
+ [hwmon_curr_average] = "curr%d_average",
+ [hwmon_curr_lowest] = "curr%d_lowest",
+ [hwmon_curr_highest] = "curr%d_highest",
+ [hwmon_curr_reset_history] = "curr%d_reset_history",
+ [hwmon_curr_label] = "curr%d_label",
+ [hwmon_curr_alarm] = "curr%d_alarm",
+ [hwmon_curr_min_alarm] = "curr%d_min_alarm",
+ [hwmon_curr_max_alarm] = "curr%d_max_alarm",
+ [hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm",
+ [hwmon_curr_crit_alarm] = "curr%d_crit_alarm",
+};
+
+static const char * const hwmon_power_attr_templates[] = {
+ [hwmon_power_average] = "power%d_average",
+ [hwmon_power_average_interval] = "power%d_average_interval",
+ [hwmon_power_average_interval_max] = "power%d_interval_max",
+ [hwmon_power_average_interval_min] = "power%d_interval_min",
+ [hwmon_power_average_highest] = "power%d_average_highest",
+ [hwmon_power_average_lowest] = "power%d_average_lowest",
+ [hwmon_power_average_max] = "power%d_average_max",
+ [hwmon_power_average_min] = "power%d_average_min",
+ [hwmon_power_input] = "power%d_input",
+ [hwmon_power_input_highest] = "power%d_input_highest",
+ [hwmon_power_input_lowest] = "power%d_input_lowest",
+ [hwmon_power_reset_history] = "power%d_reset_history",
+ [hwmon_power_accuracy] = "power%d_accuracy",
+ [hwmon_power_cap] = "power%d_cap",
+ [hwmon_power_cap_hyst] = "power%d_cap_hyst",
+ [hwmon_power_cap_max] = "power%d_cap_max",
+ [hwmon_power_cap_min] = "power%d_cap_min",
+ [hwmon_power_min] = "power%d_min",
+ [hwmon_power_max] = "power%d_max",
+ [hwmon_power_lcrit] = "power%d_lcrit",
+ [hwmon_power_crit] = "power%d_crit",
+ [hwmon_power_label] = "power%d_label",
+ [hwmon_power_alarm] = "power%d_alarm",
+ [hwmon_power_cap_alarm] = "power%d_cap_alarm",
+ [hwmon_power_min_alarm] = "power%d_min_alarm",
+ [hwmon_power_max_alarm] = "power%d_max_alarm",
+ [hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm",
+ [hwmon_power_crit_alarm] = "power%d_crit_alarm",
+};
+
+static const char * const hwmon_energy_attr_templates[] = {
+ [hwmon_energy_input] = "energy%d_input",
+ [hwmon_energy_label] = "energy%d_label",
+};
+
+static const char * const hwmon_humidity_attr_templates[] = {
+ [hwmon_humidity_input] = "humidity%d_input",
+ [hwmon_humidity_label] = "humidity%d_label",
+ [hwmon_humidity_min] = "humidity%d_min",
+ [hwmon_humidity_min_hyst] = "humidity%d_min_hyst",
+ [hwmon_humidity_max] = "humidity%d_max",
+ [hwmon_humidity_max_hyst] = "humidity%d_max_hyst",
+ [hwmon_humidity_alarm] = "humidity%d_alarm",
+ [hwmon_humidity_fault] = "humidity%d_fault",
+};
+
+static const char * const hwmon_fan_attr_templates[] = {
+ [hwmon_fan_input] = "fan%d_input",
+ [hwmon_fan_label] = "fan%d_label",
+ [hwmon_fan_min] = "fan%d_min",
+ [hwmon_fan_max] = "fan%d_max",
+ [hwmon_fan_div] = "fan%d_div",
+ [hwmon_fan_pulses] = "fan%d_pulses",
+ [hwmon_fan_target] = "fan%d_target",
+ [hwmon_fan_alarm] = "fan%d_alarm",
+ [hwmon_fan_min_alarm] = "fan%d_min_alarm",
+ [hwmon_fan_max_alarm] = "fan%d_max_alarm",
+ [hwmon_fan_fault] = "fan%d_fault",
+};
+
+static const char * const hwmon_pwm_attr_templates[] = {
+ [hwmon_pwm_input] = "pwm%d",
+ [hwmon_pwm_enable] = "pwm%d_enable",
+ [hwmon_pwm_mode] = "pwm%d_mode",
+ [hwmon_pwm_freq] = "pwm%d_freq",
+};
+
+static const char * const *__templates[] = {
+ [hwmon_chip] = hwmon_chip_attrs,
+ [hwmon_temp] = hwmon_temp_attr_templates,
+ [hwmon_in] = hwmon_in_attr_templates,
+ [hwmon_curr] = hwmon_curr_attr_templates,
+ [hwmon_power] = hwmon_power_attr_templates,
+ [hwmon_energy] = hwmon_energy_attr_templates,
+ [hwmon_humidity] = hwmon_humidity_attr_templates,
+ [hwmon_fan] = hwmon_fan_attr_templates,
+ [hwmon_pwm] = hwmon_pwm_attr_templates,
+};
+
+static const int __templates_size[] = {
+ [hwmon_chip] = ARRAY_SIZE(hwmon_chip_attrs),
+ [hwmon_temp] = ARRAY_SIZE(hwmon_temp_attr_templates),
+ [hwmon_in] = ARRAY_SIZE(hwmon_in_attr_templates),
+ [hwmon_curr] = ARRAY_SIZE(hwmon_curr_attr_templates),
+ [hwmon_power] = ARRAY_SIZE(hwmon_power_attr_templates),
+ [hwmon_energy] = ARRAY_SIZE(hwmon_energy_attr_templates),
+ [hwmon_humidity] = ARRAY_SIZE(hwmon_humidity_attr_templates),
+ [hwmon_fan] = ARRAY_SIZE(hwmon_fan_attr_templates),
+ [hwmon_pwm] = ARRAY_SIZE(hwmon_pwm_attr_templates),
+};
+
+static int hwmon_num_channel_attrs(const struct hwmon_channel_info *info)
+{
+ int i, n;
+
+ for (i = n = 0; info->config[i]; i++)
+ n += hweight32(info->config[i]);
+
+ return n;
+}
+
+static int hwmon_genattrs(struct device *dev,
+ const void *drvdata,
+ struct attribute **attrs,
+ const struct hwmon_ops *ops,
+ const struct hwmon_channel_info *info)
+{
+ const char * const *templates;
+ int template_size;
+ int i, aindex = 0;
+
+ if (info->type >= ARRAY_SIZE(__templates))
+ return -EINVAL;
+
+ templates = __templates[info->type];
+ template_size = __templates_size[info->type];
+
+ for (i = 0; info->config[i]; i++) {
+ u32 attr_mask = info->config[i];
+ u32 attr;
+
+ while (attr_mask) {
+ struct attribute *a;
+
+ attr = __ffs(attr_mask);
+ attr_mask &= ~BIT(attr);
+ if (attr >= template_size)
+ return -EINVAL;
+ a = hwmon_genattr(dev, drvdata, info->type, attr, i,
+ templates[attr], ops);
+ if (IS_ERR(a)) {
+ if (PTR_ERR(a) != -ENOENT)
+ return PTR_ERR(a);
+ continue;
+ }
+ attrs[aindex++] = a;
+ }
+ }
+ return aindex;
+}
+
+static struct attribute **
+__hwmon_create_attrs(struct device *dev, const void *drvdata,
+ const struct hwmon_chip_info *chip)
+{
+ int ret, i, aindex = 0, nattrs = 0;
+ struct attribute **attrs;
+
+ for (i = 0; chip->info[i]; i++)
+ nattrs += hwmon_num_channel_attrs(chip->info[i]);
+
+ if (nattrs == 0)
+ return ERR_PTR(-EINVAL);
+
+ attrs = devm_kcalloc(dev, nattrs + 1, sizeof(*attrs), GFP_KERNEL);
+ if (!attrs)
+ return ERR_PTR(-ENOMEM);
+
+ for (i = 0; chip->info[i]; i++) {
+ ret = hwmon_genattrs(dev, drvdata, &attrs[aindex], chip->ops,
+ chip->info[i]);
+ if (ret < 0)
+ return ERR_PTR(ret);
+ aindex += ret;
+ }
+
+ return attrs;
+}
+
+static struct device *
+__hwmon_device_register(struct device *dev, const char *name, void *drvdata,
+ const struct hwmon_chip_info *chip,
+ const struct attribute_group **groups)
+{
+ struct hwmon_device *hwdev;
+ struct device *hdev;
+ int i, j, err, id;
+
+ /* Complain about invalid characters in hwmon name attribute */
+ if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
+ dev_warn(dev,
+ "hwmon: '%s' is not a valid name attribute, please fix\n",
+ name);
+
+ id = ida_simple_get(&hwmon_ida, 0, 0, GFP_KERNEL);
+ if (id < 0)
+ return ERR_PTR(id);
+
+ hwdev = kzalloc(sizeof(*hwdev), GFP_KERNEL);
+ if (hwdev == NULL) {
+ err = -ENOMEM;
+ goto ida_remove;
+ }
+
+ hdev = &hwdev->dev;
+
+ if (chip) {
+ struct attribute **attrs;
+ int ngroups = 2; /* terminating NULL plus &hwdev->groups */
+
+ if (groups)
+ for (i = 0; groups[i]; i++)
+ ngroups++;
+
+ hwdev->groups = devm_kcalloc(dev, ngroups, sizeof(*groups),
+ GFP_KERNEL);
+ if (!hwdev->groups) {
+ err = -ENOMEM;
+ goto free_hwmon;
+ }
+
+ attrs = __hwmon_create_attrs(dev, drvdata, chip);
+ if (IS_ERR(attrs)) {
+ err = PTR_ERR(attrs);
+ goto free_hwmon;
+ }
+
+ hwdev->group.attrs = attrs;
+ ngroups = 0;
+ hwdev->groups[ngroups++] = &hwdev->group;
+
+ if (groups) {
+ for (i = 0; groups[i]; i++)
+ hwdev->groups[ngroups++] = groups[i];
+ }
+
+ hdev->groups = hwdev->groups;
+ } else {
+ hdev->groups = groups;
+ }
+
+ hwdev->name = name;
+ hdev->class = &hwmon_class;
+ hdev->parent = dev;
+ hdev->of_node = dev ? dev->of_node : NULL;
+ hwdev->chip = chip;
+ dev_set_drvdata(hdev, drvdata);
+ dev_set_name(hdev, HWMON_ID_FORMAT, id);
+ err = device_register(hdev);
+ if (err)
+ goto free_hwmon;
+
+ if (dev && chip && chip->ops->read &&
+ chip->info[0]->type == hwmon_chip &&
+ (chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) {
+ const struct hwmon_channel_info **info = chip->info;
+
+ for (i = 1; info[i]; i++) {
+ if (info[i]->type != hwmon_temp)
+ continue;
+
+ for (j = 0; info[i]->config[j]; j++) {
+ if (!chip->ops->is_visible(drvdata, hwmon_temp,
+ hwmon_temp_input, j))
+ continue;
+ if (info[i]->config[j] & HWMON_T_INPUT) {
+ err = hwmon_thermal_add_sensor(dev,
+ hwdev, j);
+ if (err) {
+ device_unregister(hdev);
+ goto ida_remove;
+ }
+ }
+ }
+ }
+ }
+
+ return hdev;
+
+free_hwmon:
+ kfree(hwdev);
+ida_remove:
+ ida_simple_remove(&hwmon_ida, id);
+ return ERR_PTR(err);
+}
+
+/**
+ * hwmon_device_register_with_groups - register w/ hwmon
+ * @dev: the parent device
+ * @name: hwmon name attribute
+ * @drvdata: driver data to attach to created device
+ * @groups: List of attribute groups to create
+ *
+ * hwmon_device_unregister() must be called when the device is no
+ * longer needed.
+ *
+ * Returns the pointer to the new device.
+ */
+struct device *
+hwmon_device_register_with_groups(struct device *dev, const char *name,
+ void *drvdata,
+ const struct attribute_group **groups)
+{
+ if (!name)
+ return ERR_PTR(-EINVAL);
+
+ return __hwmon_device_register(dev, name, drvdata, NULL, groups);
+}
+EXPORT_SYMBOL_GPL(hwmon_device_register_with_groups);
+
+/**
+ * hwmon_device_register_with_info - register w/ hwmon
+ * @dev: the parent device
+ * @name: hwmon name attribute
+ * @drvdata: driver data to attach to created device
+ * @chip: pointer to hwmon chip information
+ * @extra_groups: pointer to list of additional non-standard attribute groups
+ *
+ * hwmon_device_unregister() must be called when the device is no
+ * longer needed.
+ *
+ * Returns the pointer to the new device.
+ */
+struct device *
+hwmon_device_register_with_info(struct device *dev, const char *name,
+ void *drvdata,
+ const struct hwmon_chip_info *chip,
+ const struct attribute_group **extra_groups)
+{
+ if (!name)
+ return ERR_PTR(-EINVAL);
+
+ if (chip && (!chip->ops || !chip->ops->is_visible || !chip->info))
+ return ERR_PTR(-EINVAL);
+
+ if (chip && !dev)
+ return ERR_PTR(-EINVAL);
+
+ return __hwmon_device_register(dev, name, drvdata, chip, extra_groups);
+}
+EXPORT_SYMBOL_GPL(hwmon_device_register_with_info);
+
+/**
+ * hwmon_device_register - register w/ hwmon
+ * @dev: the device to register
+ *
+ * hwmon_device_unregister() must be called when the device is no
+ * longer needed.
+ *
+ * Returns the pointer to the new device.
+ */
+struct device *hwmon_device_register(struct device *dev)
+{
+ dev_warn(dev,
+ "hwmon_device_register() is deprecated. Please convert the driver to use hwmon_device_register_with_info().\n");
+
+ return __hwmon_device_register(dev, NULL, NULL, NULL, NULL);
+}
+EXPORT_SYMBOL_GPL(hwmon_device_register);
+
+/**
+ * hwmon_device_unregister - removes the previously registered class device
+ *
+ * @dev: the class device to destroy
+ */
+void hwmon_device_unregister(struct device *dev)
+{
+ int id;
+
+ if (likely(sscanf(dev_name(dev), HWMON_ID_FORMAT, &id) == 1)) {
+ device_unregister(dev);
+ ida_simple_remove(&hwmon_ida, id);
+ } else
+ dev_dbg(dev->parent,
+ "hwmon_device_unregister() failed: bad class ID!\n");
+}
+EXPORT_SYMBOL_GPL(hwmon_device_unregister);
+
+static void devm_hwmon_release(struct device *dev, void *res)
+{
+ struct device *hwdev = *(struct device **)res;
+
+ hwmon_device_unregister(hwdev);
+}
+
+/**
+ * devm_hwmon_device_register_with_groups - register w/ hwmon
+ * @dev: the parent device
+ * @name: hwmon name attribute
+ * @drvdata: driver data to attach to created device
+ * @groups: List of attribute groups to create
+ *
+ * Returns the pointer to the new device. The new device is automatically
+ * unregistered with the parent device.
+ */
+struct device *
+devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
+ void *drvdata,
+ const struct attribute_group **groups)
+{
+ struct device **ptr, *hwdev;
+
+ if (!dev)
+ return ERR_PTR(-EINVAL);
+
+ ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ hwdev = hwmon_device_register_with_groups(dev, name, drvdata, groups);
+ if (IS_ERR(hwdev))
+ goto error;
+
+ *ptr = hwdev;
+ devres_add(dev, ptr);
+ return hwdev;
+
+error:
+ devres_free(ptr);
+ return hwdev;
+}
+EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_groups);
+
+/**
+ * devm_hwmon_device_register_with_info - register w/ hwmon
+ * @dev: the parent device
+ * @name: hwmon name attribute
+ * @drvdata: driver data to attach to created device
+ * @chip: pointer to hwmon chip information
+ * @groups: pointer to list of driver specific attribute groups
+ *
+ * Returns the pointer to the new device. The new device is automatically
+ * unregistered with the parent device.
+ */
+struct device *
+devm_hwmon_device_register_with_info(struct device *dev, const char *name,
+ void *drvdata,
+ const struct hwmon_chip_info *chip,
+ const struct attribute_group **groups)
+{
+ struct device **ptr, *hwdev;
+
+ if (!dev)
+ return ERR_PTR(-EINVAL);
+
+ ptr = devres_alloc(devm_hwmon_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ hwdev = hwmon_device_register_with_info(dev, name, drvdata, chip,
+ groups);
+ if (IS_ERR(hwdev))
+ goto error;
+
+ *ptr = hwdev;
+ devres_add(dev, ptr);
+
+ return hwdev;
+
+error:
+ devres_free(ptr);
+ return hwdev;
+}
+EXPORT_SYMBOL_GPL(devm_hwmon_device_register_with_info);
+
+static int devm_hwmon_match(struct device *dev, void *res, void *data)
+{
+ struct device **hwdev = res;
+
+ return *hwdev == data;
+}
+
+/**
+ * devm_hwmon_device_unregister - removes a previously registered hwmon device
+ *
+ * @dev: the parent device of the device to unregister
+ */
+void devm_hwmon_device_unregister(struct device *dev)
+{
+ WARN_ON(devres_release(dev, devm_hwmon_release, devm_hwmon_match, dev));
+}
+EXPORT_SYMBOL_GPL(devm_hwmon_device_unregister);
+
+static void __init hwmon_pci_quirks(void)
+{
+#if defined CONFIG_X86 && defined CONFIG_PCI
+ struct pci_dev *sb;
+ u16 base;
+ u8 enable;
+
+ /* Open access to 0x295-0x296 on MSI MS-7031 */
+ sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL);
+ if (sb) {
+ if (sb->subsystem_vendor == 0x1462 && /* MSI */
+ sb->subsystem_device == 0x0031) { /* MS-7031 */
+ pci_read_config_byte(sb, 0x48, &enable);
+ pci_read_config_word(sb, 0x64, &base);
+
+ if (base == 0 && !(enable & BIT(2))) {
+ dev_info(&sb->dev,
+ "Opening wide generic port at 0x295\n");
+ pci_write_config_word(sb, 0x64, 0x295);
+ pci_write_config_byte(sb, 0x48,
+ enable | BIT(2));
+ }
+ }
+ pci_dev_put(sb);
+ }
+#endif
+}
+
+static int __init hwmon_init(void)
+{
+ int err;
+
+ hwmon_pci_quirks();
+
+ err = class_register(&hwmon_class);
+ if (err) {
+ pr_err("couldn't register hwmon sysfs class\n");
+ return err;
+ }
+ return 0;
+}
+
+static void __exit hwmon_exit(void)
+{
+ class_unregister(&hwmon_class);
+}
+
+subsys_initcall(hwmon_init);
+module_exit(hwmon_exit);
+
+MODULE_AUTHOR("Mark M. Hoffman <mhoffman@lightlink.com>");
+MODULE_DESCRIPTION("hardware monitoring sysfs/class support");
+MODULE_LICENSE("GPL");
+