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3a412d5e4a
Allocating the sysfs attribute name only if needed and only with the required minimum length looks optimal, but does not take the additional overhead for both devm_ data structures and the allocation header itself into account. This also results in unnecessary memory fragmentation. Move the sysfs name string into struct hwmon_device_attribute and give it a sufficient length to reduce this overhead. Signed-off-by: Guenter Roeck <linux@roeck-us.net>
879 lines
23 KiB
C
879 lines
23 KiB
C
/*
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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 <mhoffman@lightlink.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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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/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 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 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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/*
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* Thermal zone information
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* In addition to the reference to the hwmon device,
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* also provides the sensor index.
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*/
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struct hwmon_thermal_data {
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struct hwmon_device *hwdev; /* Reference to hwmon device */
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int index; /* sensor index */
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};
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static ssize_t
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show_name(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(name, S_IRUGO, show_name, NULL);
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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 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_dev_release(struct device *dev)
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{
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kfree(to_hwmon_device(dev));
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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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#if IS_REACHABLE(CONFIG_THERMAL) && defined(CONFIG_THERMAL_OF) && \
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(!defined(CONFIG_THERMAL_HWMON) || \
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!(defined(MODULE) && IS_MODULE(CONFIG_THERMAL)))
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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 = tdata->hwdev;
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int ret;
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long t;
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ret = hwdev->chip->ops->read(&hwdev->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 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 int hwmon_thermal_add_sensor(struct device *dev,
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struct hwmon_device *hwdev, int index)
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{
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struct hwmon_thermal_data *tdata;
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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->hwdev = hwdev;
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tdata->index = index;
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devm_thermal_zone_of_sensor_register(&hwdev->dev, index, tdata,
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&hwmon_thermal_ops);
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return 0;
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}
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#else
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static int hwmon_thermal_add_sensor(struct device *dev,
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struct hwmon_device *hwdev, int index)
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{
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return 0;
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}
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#endif /* IS_REACHABLE(CONFIG_THERMAL) && ... */
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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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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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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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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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return count;
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}
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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)
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return 0;
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return 1;
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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(struct device *dev,
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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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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 & S_IRUGO) && ((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 & S_IWUGO) && !ops->write)
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return ERR_PTR(-EINVAL);
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hattr = devm_kzalloc(dev, 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 = (char *)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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};
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static const char * const hwmon_temp_attr_templates[] = {
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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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};
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static const char * const hwmon_in_attr_templates[] = {
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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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};
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static const char * const hwmon_curr_attr_templates[] = {
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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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};
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static const char * const hwmon_power_attr_templates[] = {
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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_max] = "power%d_max",
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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_max_alarm] = "power%d_max_alarm",
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[hwmon_power_crit_alarm] = "power%d_crit_alarm",
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};
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static const char * const hwmon_energy_attr_templates[] = {
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[hwmon_energy_input] = "energy%d_input",
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[hwmon_energy_label] = "energy%d_label",
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};
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static const char * const hwmon_humidity_attr_templates[] = {
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[hwmon_humidity_input] = "humidity%d_input",
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[hwmon_humidity_label] = "humidity%d_label",
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[hwmon_humidity_min] = "humidity%d_min",
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[hwmon_humidity_min_hyst] = "humidity%d_min_hyst",
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[hwmon_humidity_max] = "humidity%d_max",
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[hwmon_humidity_max_hyst] = "humidity%d_max_hyst",
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[hwmon_humidity_alarm] = "humidity%d_alarm",
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[hwmon_humidity_fault] = "humidity%d_fault",
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};
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static const char * const hwmon_fan_attr_templates[] = {
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[hwmon_fan_input] = "fan%d_input",
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[hwmon_fan_label] = "fan%d_label",
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[hwmon_fan_min] = "fan%d_min",
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[hwmon_fan_max] = "fan%d_max",
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[hwmon_fan_div] = "fan%d_div",
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[hwmon_fan_pulses] = "fan%d_pulses",
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[hwmon_fan_target] = "fan%d_target",
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[hwmon_fan_alarm] = "fan%d_alarm",
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[hwmon_fan_min_alarm] = "fan%d_min_alarm",
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[hwmon_fan_max_alarm] = "fan%d_max_alarm",
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[hwmon_fan_fault] = "fan%d_fault",
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};
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static const char * const hwmon_pwm_attr_templates[] = {
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[hwmon_pwm_input] = "pwm%d",
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[hwmon_pwm_enable] = "pwm%d_enable",
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[hwmon_pwm_mode] = "pwm%d_mode",
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[hwmon_pwm_freq] = "pwm%d_freq",
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};
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static const char * const *__templates[] = {
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[hwmon_chip] = hwmon_chip_attrs,
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[hwmon_temp] = hwmon_temp_attr_templates,
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[hwmon_in] = hwmon_in_attr_templates,
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[hwmon_curr] = hwmon_curr_attr_templates,
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[hwmon_power] = hwmon_power_attr_templates,
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[hwmon_energy] = hwmon_energy_attr_templates,
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[hwmon_humidity] = hwmon_humidity_attr_templates,
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[hwmon_fan] = hwmon_fan_attr_templates,
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[hwmon_pwm] = hwmon_pwm_attr_templates,
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};
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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;
|
|
|
|
/* Do not accept invalid characters in hwmon name attribute */
|
|
if (name && (!strlen(name) || strpbrk(name, "-* \t\n")))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
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 (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)
|
|
hwmon_thermal_add_sensor(dev, hwdev, j);
|
|
}
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
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
|
|
* @info: 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 (chip && (!chip->ops || !chip->ops->is_visible || !chip->info))
|
|
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_with_groups(dev, 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
|
|
* @info: 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");
|
|
|