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1041 lines
27 KiB
1041 lines
27 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* hwmon.c - part of lm_sensors, Linux kernel modules for hardware monitoring |
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* |
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* This file defines the sysfs class "hwmon", for use by sensors drivers. |
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* |
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* Copyright (C) 2005 Mark M. Hoffman <[email protected]> |
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*/ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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#include <linux/bitops.h> |
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#include <linux/device.h> |
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#include <linux/err.h> |
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#include <linux/gfp.h> |
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#include <linux/hwmon.h> |
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#include <linux/idr.h> |
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/slab.h> |
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#include <linux/string.h> |
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#include <linux/thermal.h> |
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#define CREATE_TRACE_POINTS |
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#include <trace/events/hwmon.h> |
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#define HWMON_ID_PREFIX "hwmon" |
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#define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" |
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struct hwmon_device { |
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const char *name; |
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struct device dev; |
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const struct hwmon_chip_info *chip; |
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struct list_head tzdata; |
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struct attribute_group group; |
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const struct attribute_group **groups; |
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}; |
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#define to_hwmon_device(d) container_of(d, struct hwmon_device, dev) |
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#define MAX_SYSFS_ATTR_NAME_LENGTH 32 |
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struct hwmon_device_attribute { |
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struct device_attribute dev_attr; |
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const struct hwmon_ops *ops; |
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enum hwmon_sensor_types type; |
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u32 attr; |
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int index; |
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char name[MAX_SYSFS_ATTR_NAME_LENGTH]; |
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}; |
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#define to_hwmon_attr(d) \ |
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container_of(d, struct hwmon_device_attribute, dev_attr) |
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#define to_dev_attr(a) container_of(a, struct device_attribute, attr) |
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/* |
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* Thermal zone information |
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*/ |
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struct hwmon_thermal_data { |
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struct list_head node; /* hwmon tzdata list entry */ |
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struct device *dev; /* Reference to hwmon device */ |
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int index; /* sensor index */ |
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struct thermal_zone_device *tzd;/* thermal zone device */ |
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}; |
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static ssize_t |
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name_show(struct device *dev, struct device_attribute *attr, char *buf) |
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{ |
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return sprintf(buf, "%s\n", to_hwmon_device(dev)->name); |
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} |
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static DEVICE_ATTR_RO(name); |
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static struct attribute *hwmon_dev_attrs[] = { |
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&dev_attr_name.attr, |
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NULL |
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}; |
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static umode_t hwmon_dev_name_is_visible(struct kobject *kobj, |
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struct attribute *attr, int n) |
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{ |
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struct device *dev = container_of(kobj, struct device, kobj); |
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if (to_hwmon_device(dev)->name == NULL) |
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return 0; |
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return attr->mode; |
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} |
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static const struct attribute_group hwmon_dev_attr_group = { |
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.attrs = hwmon_dev_attrs, |
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.is_visible = hwmon_dev_name_is_visible, |
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}; |
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static const struct attribute_group *hwmon_dev_attr_groups[] = { |
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&hwmon_dev_attr_group, |
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NULL |
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}; |
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static void hwmon_free_attrs(struct attribute **attrs) |
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{ |
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int i; |
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for (i = 0; attrs[i]; i++) { |
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struct device_attribute *dattr = to_dev_attr(attrs[i]); |
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struct hwmon_device_attribute *hattr = to_hwmon_attr(dattr); |
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kfree(hattr); |
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} |
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kfree(attrs); |
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} |
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static void hwmon_dev_release(struct device *dev) |
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{ |
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struct hwmon_device *hwdev = to_hwmon_device(dev); |
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if (hwdev->group.attrs) |
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hwmon_free_attrs(hwdev->group.attrs); |
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kfree(hwdev->groups); |
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kfree(hwdev); |
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} |
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static struct class hwmon_class = { |
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.name = "hwmon", |
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.owner = THIS_MODULE, |
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.dev_groups = hwmon_dev_attr_groups, |
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.dev_release = hwmon_dev_release, |
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}; |
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static DEFINE_IDA(hwmon_ida); |
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/* Thermal zone handling */ |
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/* |
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* The complex conditional is necessary to avoid a cyclic dependency |
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* between hwmon and thermal_sys modules. |
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*/ |
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#ifdef CONFIG_THERMAL_OF |
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static int hwmon_thermal_get_temp(void *data, int *temp) |
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{ |
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struct hwmon_thermal_data *tdata = data; |
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struct hwmon_device *hwdev = to_hwmon_device(tdata->dev); |
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int ret; |
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long t; |
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ret = hwdev->chip->ops->read(tdata->dev, hwmon_temp, hwmon_temp_input, |
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tdata->index, &t); |
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if (ret < 0) |
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return ret; |
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*temp = t; |
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return 0; |
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} |
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static const struct thermal_zone_of_device_ops hwmon_thermal_ops = { |
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.get_temp = hwmon_thermal_get_temp, |
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}; |
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static void hwmon_thermal_remove_sensor(void *data) |
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{ |
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list_del(data); |
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} |
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static int hwmon_thermal_add_sensor(struct device *dev, int index) |
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{ |
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struct hwmon_device *hwdev = to_hwmon_device(dev); |
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struct hwmon_thermal_data *tdata; |
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struct thermal_zone_device *tzd; |
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int err; |
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tdata = devm_kzalloc(dev, sizeof(*tdata), GFP_KERNEL); |
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if (!tdata) |
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return -ENOMEM; |
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tdata->dev = dev; |
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tdata->index = index; |
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tzd = devm_thermal_zone_of_sensor_register(dev, index, tdata, |
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&hwmon_thermal_ops); |
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/* |
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* If CONFIG_THERMAL_OF is disabled, this returns -ENODEV, |
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* so ignore that error but forward any other error. |
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*/ |
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if (IS_ERR(tzd) && (PTR_ERR(tzd) != -ENODEV)) |
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return PTR_ERR(tzd); |
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err = devm_add_action(dev, hwmon_thermal_remove_sensor, &tdata->node); |
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if (err) |
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return err; |
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tdata->tzd = tzd; |
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list_add(&tdata->node, &hwdev->tzdata); |
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return 0; |
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} |
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static int hwmon_thermal_register_sensors(struct device *dev) |
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{ |
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struct hwmon_device *hwdev = to_hwmon_device(dev); |
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const struct hwmon_chip_info *chip = hwdev->chip; |
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const struct hwmon_channel_info **info = chip->info; |
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void *drvdata = dev_get_drvdata(dev); |
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int i; |
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for (i = 1; info[i]; i++) { |
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int j; |
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if (info[i]->type != hwmon_temp) |
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continue; |
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for (j = 0; info[i]->config[j]; j++) { |
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int err; |
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if (!(info[i]->config[j] & HWMON_T_INPUT) || |
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!chip->ops->is_visible(drvdata, hwmon_temp, |
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hwmon_temp_input, j)) |
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continue; |
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err = hwmon_thermal_add_sensor(dev, j); |
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if (err) |
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return err; |
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} |
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} |
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return 0; |
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} |
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static void hwmon_thermal_notify(struct device *dev, int index) |
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{ |
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struct hwmon_device *hwdev = to_hwmon_device(dev); |
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struct hwmon_thermal_data *tzdata; |
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list_for_each_entry(tzdata, &hwdev->tzdata, node) { |
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if (tzdata->index == index) { |
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thermal_zone_device_update(tzdata->tzd, |
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THERMAL_EVENT_UNSPECIFIED); |
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} |
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} |
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} |
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#else |
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static int hwmon_thermal_register_sensors(struct device *dev) |
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{ |
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return 0; |
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} |
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static void hwmon_thermal_notify(struct device *dev, int index) { } |
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#endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */ |
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static int hwmon_attr_base(enum hwmon_sensor_types type) |
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{ |
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if (type == hwmon_in || type == hwmon_intrusion) |
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return 0; |
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return 1; |
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} |
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/* sysfs attribute management */ |
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static ssize_t hwmon_attr_show(struct device *dev, |
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struct device_attribute *devattr, char *buf) |
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{ |
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struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
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long val; |
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int ret; |
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ret = hattr->ops->read(dev, hattr->type, hattr->attr, hattr->index, |
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&val); |
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if (ret < 0) |
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return ret; |
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trace_hwmon_attr_show(hattr->index + hwmon_attr_base(hattr->type), |
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hattr->name, val); |
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return sprintf(buf, "%ld\n", val); |
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} |
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static ssize_t hwmon_attr_show_string(struct device *dev, |
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struct device_attribute *devattr, |
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char *buf) |
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{ |
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struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
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enum hwmon_sensor_types type = hattr->type; |
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const char *s; |
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int ret; |
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ret = hattr->ops->read_string(dev, hattr->type, hattr->attr, |
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hattr->index, &s); |
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if (ret < 0) |
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return ret; |
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trace_hwmon_attr_show_string(hattr->index + hwmon_attr_base(type), |
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hattr->name, s); |
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return sprintf(buf, "%s\n", s); |
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} |
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static ssize_t hwmon_attr_store(struct device *dev, |
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struct device_attribute *devattr, |
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const char *buf, size_t count) |
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{ |
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struct hwmon_device_attribute *hattr = to_hwmon_attr(devattr); |
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long val; |
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int ret; |
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ret = kstrtol(buf, 10, &val); |
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if (ret < 0) |
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return ret; |
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ret = hattr->ops->write(dev, hattr->type, hattr->attr, hattr->index, |
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val); |
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if (ret < 0) |
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return ret; |
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trace_hwmon_attr_store(hattr->index + hwmon_attr_base(hattr->type), |
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hattr->name, val); |
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return count; |
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} |
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static bool is_string_attr(enum hwmon_sensor_types type, u32 attr) |
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{ |
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return (type == hwmon_temp && attr == hwmon_temp_label) || |
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(type == hwmon_in && attr == hwmon_in_label) || |
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(type == hwmon_curr && attr == hwmon_curr_label) || |
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(type == hwmon_power && attr == hwmon_power_label) || |
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(type == hwmon_energy && attr == hwmon_energy_label) || |
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(type == hwmon_humidity && attr == hwmon_humidity_label) || |
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(type == hwmon_fan && attr == hwmon_fan_label); |
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} |
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static struct attribute *hwmon_genattr(const void *drvdata, |
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enum hwmon_sensor_types type, |
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u32 attr, |
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int index, |
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const char *template, |
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const struct hwmon_ops *ops) |
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{ |
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struct hwmon_device_attribute *hattr; |
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struct device_attribute *dattr; |
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struct attribute *a; |
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umode_t mode; |
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const char *name; |
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bool is_string = is_string_attr(type, attr); |
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/* The attribute is invisible if there is no template string */ |
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if (!template) |
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return ERR_PTR(-ENOENT); |
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mode = ops->is_visible(drvdata, type, attr, index); |
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if (!mode) |
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return ERR_PTR(-ENOENT); |
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if ((mode & 0444) && ((is_string && !ops->read_string) || |
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(!is_string && !ops->read))) |
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return ERR_PTR(-EINVAL); |
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if ((mode & 0222) && !ops->write) |
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return ERR_PTR(-EINVAL); |
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hattr = kzalloc(sizeof(*hattr), GFP_KERNEL); |
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if (!hattr) |
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return ERR_PTR(-ENOMEM); |
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if (type == hwmon_chip) { |
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name = template; |
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} else { |
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scnprintf(hattr->name, sizeof(hattr->name), template, |
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index + hwmon_attr_base(type)); |
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name = hattr->name; |
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} |
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hattr->type = type; |
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hattr->attr = attr; |
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hattr->index = index; |
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hattr->ops = ops; |
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dattr = &hattr->dev_attr; |
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dattr->show = is_string ? hwmon_attr_show_string : hwmon_attr_show; |
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dattr->store = hwmon_attr_store; |
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a = &dattr->attr; |
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sysfs_attr_init(a); |
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a->name = name; |
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a->mode = mode; |
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return a; |
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} |
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/* |
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* Chip attributes are not attribute templates but actual sysfs attributes. |
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* See hwmon_genattr() for special handling. |
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*/ |
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static const char * const hwmon_chip_attrs[] = { |
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[hwmon_chip_temp_reset_history] = "temp_reset_history", |
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[hwmon_chip_in_reset_history] = "in_reset_history", |
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[hwmon_chip_curr_reset_history] = "curr_reset_history", |
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[hwmon_chip_power_reset_history] = "power_reset_history", |
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[hwmon_chip_update_interval] = "update_interval", |
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[hwmon_chip_alarms] = "alarms", |
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[hwmon_chip_samples] = "samples", |
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[hwmon_chip_curr_samples] = "curr_samples", |
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[hwmon_chip_in_samples] = "in_samples", |
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[hwmon_chip_power_samples] = "power_samples", |
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[hwmon_chip_temp_samples] = "temp_samples", |
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}; |
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static const char * const hwmon_temp_attr_templates[] = { |
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[hwmon_temp_enable] = "temp%d_enable", |
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[hwmon_temp_input] = "temp%d_input", |
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[hwmon_temp_type] = "temp%d_type", |
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[hwmon_temp_lcrit] = "temp%d_lcrit", |
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[hwmon_temp_lcrit_hyst] = "temp%d_lcrit_hyst", |
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[hwmon_temp_min] = "temp%d_min", |
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[hwmon_temp_min_hyst] = "temp%d_min_hyst", |
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[hwmon_temp_max] = "temp%d_max", |
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[hwmon_temp_max_hyst] = "temp%d_max_hyst", |
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[hwmon_temp_crit] = "temp%d_crit", |
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[hwmon_temp_crit_hyst] = "temp%d_crit_hyst", |
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[hwmon_temp_emergency] = "temp%d_emergency", |
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[hwmon_temp_emergency_hyst] = "temp%d_emergency_hyst", |
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[hwmon_temp_alarm] = "temp%d_alarm", |
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[hwmon_temp_lcrit_alarm] = "temp%d_lcrit_alarm", |
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[hwmon_temp_min_alarm] = "temp%d_min_alarm", |
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[hwmon_temp_max_alarm] = "temp%d_max_alarm", |
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[hwmon_temp_crit_alarm] = "temp%d_crit_alarm", |
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[hwmon_temp_emergency_alarm] = "temp%d_emergency_alarm", |
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[hwmon_temp_fault] = "temp%d_fault", |
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[hwmon_temp_offset] = "temp%d_offset", |
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[hwmon_temp_label] = "temp%d_label", |
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[hwmon_temp_lowest] = "temp%d_lowest", |
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[hwmon_temp_highest] = "temp%d_highest", |
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[hwmon_temp_reset_history] = "temp%d_reset_history", |
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[hwmon_temp_rated_min] = "temp%d_rated_min", |
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[hwmon_temp_rated_max] = "temp%d_rated_max", |
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}; |
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static const char * const hwmon_in_attr_templates[] = { |
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[hwmon_in_enable] = "in%d_enable", |
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[hwmon_in_input] = "in%d_input", |
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[hwmon_in_min] = "in%d_min", |
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[hwmon_in_max] = "in%d_max", |
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[hwmon_in_lcrit] = "in%d_lcrit", |
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[hwmon_in_crit] = "in%d_crit", |
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[hwmon_in_average] = "in%d_average", |
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[hwmon_in_lowest] = "in%d_lowest", |
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[hwmon_in_highest] = "in%d_highest", |
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[hwmon_in_reset_history] = "in%d_reset_history", |
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[hwmon_in_label] = "in%d_label", |
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[hwmon_in_alarm] = "in%d_alarm", |
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[hwmon_in_min_alarm] = "in%d_min_alarm", |
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[hwmon_in_max_alarm] = "in%d_max_alarm", |
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[hwmon_in_lcrit_alarm] = "in%d_lcrit_alarm", |
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[hwmon_in_crit_alarm] = "in%d_crit_alarm", |
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[hwmon_in_rated_min] = "in%d_rated_min", |
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[hwmon_in_rated_max] = "in%d_rated_max", |
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}; |
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static const char * const hwmon_curr_attr_templates[] = { |
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[hwmon_curr_enable] = "curr%d_enable", |
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[hwmon_curr_input] = "curr%d_input", |
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[hwmon_curr_min] = "curr%d_min", |
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[hwmon_curr_max] = "curr%d_max", |
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[hwmon_curr_lcrit] = "curr%d_lcrit", |
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[hwmon_curr_crit] = "curr%d_crit", |
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[hwmon_curr_average] = "curr%d_average", |
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[hwmon_curr_lowest] = "curr%d_lowest", |
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[hwmon_curr_highest] = "curr%d_highest", |
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[hwmon_curr_reset_history] = "curr%d_reset_history", |
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[hwmon_curr_label] = "curr%d_label", |
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[hwmon_curr_alarm] = "curr%d_alarm", |
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[hwmon_curr_min_alarm] = "curr%d_min_alarm", |
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[hwmon_curr_max_alarm] = "curr%d_max_alarm", |
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[hwmon_curr_lcrit_alarm] = "curr%d_lcrit_alarm", |
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[hwmon_curr_crit_alarm] = "curr%d_crit_alarm", |
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[hwmon_curr_rated_min] = "curr%d_rated_min", |
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[hwmon_curr_rated_max] = "curr%d_rated_max", |
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}; |
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static const char * const hwmon_power_attr_templates[] = { |
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[hwmon_power_enable] = "power%d_enable", |
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[hwmon_power_average] = "power%d_average", |
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[hwmon_power_average_interval] = "power%d_average_interval", |
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[hwmon_power_average_interval_max] = "power%d_interval_max", |
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[hwmon_power_average_interval_min] = "power%d_interval_min", |
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[hwmon_power_average_highest] = "power%d_average_highest", |
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[hwmon_power_average_lowest] = "power%d_average_lowest", |
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[hwmon_power_average_max] = "power%d_average_max", |
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[hwmon_power_average_min] = "power%d_average_min", |
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[hwmon_power_input] = "power%d_input", |
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[hwmon_power_input_highest] = "power%d_input_highest", |
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[hwmon_power_input_lowest] = "power%d_input_lowest", |
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[hwmon_power_reset_history] = "power%d_reset_history", |
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[hwmon_power_accuracy] = "power%d_accuracy", |
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[hwmon_power_cap] = "power%d_cap", |
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[hwmon_power_cap_hyst] = "power%d_cap_hyst", |
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[hwmon_power_cap_max] = "power%d_cap_max", |
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[hwmon_power_cap_min] = "power%d_cap_min", |
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[hwmon_power_min] = "power%d_min", |
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[hwmon_power_max] = "power%d_max", |
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[hwmon_power_lcrit] = "power%d_lcrit", |
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[hwmon_power_crit] = "power%d_crit", |
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[hwmon_power_label] = "power%d_label", |
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[hwmon_power_alarm] = "power%d_alarm", |
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[hwmon_power_cap_alarm] = "power%d_cap_alarm", |
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[hwmon_power_min_alarm] = "power%d_min_alarm", |
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[hwmon_power_max_alarm] = "power%d_max_alarm", |
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[hwmon_power_lcrit_alarm] = "power%d_lcrit_alarm", |
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[hwmon_power_crit_alarm] = "power%d_crit_alarm", |
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[hwmon_power_rated_min] = "power%d_rated_min", |
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[hwmon_power_rated_max] = "power%d_rated_max", |
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}; |
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|
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static const char * const hwmon_energy_attr_templates[] = { |
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[hwmon_energy_enable] = "energy%d_enable", |
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[hwmon_energy_input] = "energy%d_input", |
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[hwmon_energy_label] = "energy%d_label", |
|
}; |
|
|
|
static const char * const hwmon_humidity_attr_templates[] = { |
|
[hwmon_humidity_enable] = "humidity%d_enable", |
|
[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", |
|
[hwmon_humidity_rated_min] = "humidity%d_rated_min", |
|
[hwmon_humidity_rated_max] = "humidity%d_rated_max", |
|
}; |
|
|
|
static const char * const hwmon_fan_attr_templates[] = { |
|
[hwmon_fan_enable] = "fan%d_enable", |
|
[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 hwmon_intrusion_attr_templates[] = { |
|
[hwmon_intrusion_alarm] = "intrusion%d_alarm", |
|
[hwmon_intrusion_beep] = "intrusion%d_beep", |
|
}; |
|
|
|
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, |
|
[hwmon_intrusion] = hwmon_intrusion_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), |
|
[hwmon_intrusion] = ARRAY_SIZE(hwmon_intrusion_attr_templates), |
|
}; |
|
|
|
int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type, |
|
u32 attr, int channel) |
|
{ |
|
char sattr[MAX_SYSFS_ATTR_NAME_LENGTH]; |
|
const char * const *templates; |
|
const char *template; |
|
int base; |
|
|
|
if (type >= ARRAY_SIZE(__templates)) |
|
return -EINVAL; |
|
if (attr >= __templates_size[type]) |
|
return -EINVAL; |
|
|
|
templates = __templates[type]; |
|
template = templates[attr]; |
|
|
|
base = hwmon_attr_base(type); |
|
|
|
scnprintf(sattr, MAX_SYSFS_ATTR_NAME_LENGTH, template, base + channel); |
|
sysfs_notify(&dev->kobj, NULL, sattr); |
|
kobject_uevent(&dev->kobj, KOBJ_CHANGE); |
|
|
|
if (type == hwmon_temp) |
|
hwmon_thermal_notify(dev, channel); |
|
|
|
return 0; |
|
} |
|
EXPORT_SYMBOL_GPL(hwmon_notify_event); |
|
|
|
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(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(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(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 = kcalloc(nattrs + 1, sizeof(*attrs), GFP_KERNEL); |
|
if (!attrs) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
for (i = 0; chip->info[i]; i++) { |
|
ret = hwmon_genattrs(drvdata, &attrs[aindex], chip->ops, |
|
chip->info[i]); |
|
if (ret < 0) { |
|
hwmon_free_attrs(attrs); |
|
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, 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 = kcalloc(ngroups, sizeof(*groups), GFP_KERNEL); |
|
if (!hwdev->groups) { |
|
err = -ENOMEM; |
|
goto free_hwmon; |
|
} |
|
|
|
attrs = __hwmon_create_attrs(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; |
|
|
|
INIT_LIST_HEAD(&hwdev->tzdata); |
|
|
|
if (dev && dev->of_node && chip && chip->ops->read && |
|
chip->info[0]->type == hwmon_chip && |
|
(chip->info[0]->config[0] & HWMON_C_REGISTER_TZ)) { |
|
err = hwmon_thermal_register_sensors(hdev); |
|
if (err) { |
|
device_unregister(hdev); |
|
/* |
|
* Don't worry about hwdev; hwmon_dev_release(), called |
|
* from device_unregister(), will free it. |
|
*/ |
|
goto ida_remove; |
|
} |
|
} |
|
|
|
return hdev; |
|
|
|
free_hwmon: |
|
hwmon_dev_release(hdev); |
|
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 <[email protected]>"); |
|
MODULE_DESCRIPTION("hardware monitoring sysfs/class support"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
|