kernel/net/ieee802154/sysfs.c

   1 /* This program is free software; you can redistribute it and/or modify
   2  * it under the terms of the GNU General Public License version 2
   3  * as published by the Free Software Foundation.
   4  *
   5  * This program is distributed in the hope that it will be useful,
   6  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   7  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   8  * GNU General Public License for more details.
   9  *
  10  * Authors:
  11  * Alexander Aring <aar@pengutronix.de>
  12  *
  13  * Based on: net/wireless/sysfs.c
  14  */
  15
  16 #include <linux/device.h>
  17 #include <linux/rtnetlink.h>
  18
  19 #include <net/cfg802154.h>
  20
  21 #include "core.h"
  22 #include "sysfs.h"
  23 #include "rdev-ops.h"
  24
  25 static inline struct cfg802154_registered_device *
  26 dev_to_rdev(struct device *dev)
  27 {
  28         return container_of(dev, struct cfg802154_registered_device,
  29                             wpan_phy.dev);
  30 }
  31
  32 #define SHOW_FMT(name, fmt, member)                                     \
  33 static ssize_t name ## _show(struct device *dev,                        \
  34                              struct device_attribute *attr,             \
  35                              char *buf)                                 \
  36 {                                                                       \
  37         return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);        \
  38 }                                                                       \
  39 static DEVICE_ATTR_RO(name)
  40
  41 SHOW_FMT(index, "%d", wpan_phy_idx);
  42
  43 static ssize_t name_show(struct device *dev,
  44                          struct device_attribute *attr,
  45                          char *buf)
  46 {
  47         struct wpan_phy *wpan_phy = &dev_to_rdev(dev)->wpan_phy;
  48
  49         return sprintf(buf, "%s\n", dev_name(&wpan_phy->dev));
  50 }
  51 static DEVICE_ATTR_RO(name);
  52
  53 static void wpan_phy_release(struct device *dev)
  54 {
  55         struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
  56
  57         cfg802154_dev_free(rdev);
  58 }
  59
  60 static struct attribute *pmib_attrs[] = {
  61         &dev_attr_index.attr,
  62         &dev_attr_name.attr,
  63         NULL,
  64 };
  65 ATTRIBUTE_GROUPS(pmib);
  66
  67 #ifdef CONFIG_PM_SLEEP
  68 static int wpan_phy_suspend(struct device *dev)
  69 {
  70         struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
  71         int ret = 0;
  72
  73         if (rdev->ops->suspend) {
  74                 rtnl_lock();
  75                 ret = rdev_suspend(rdev);
  76                 rtnl_unlock();
  77         }
  78
  79         return ret;
  80 }
  81
  82 static int wpan_phy_resume(struct device *dev)
  83 {
  84         struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
  85         int ret = 0;
  86
  87         if (rdev->ops->resume) {
  88                 rtnl_lock();
  89                 ret = rdev_resume(rdev);
  90                 rtnl_unlock();
  91         }
  92
  93         return ret;
  94 }
  95
  96 static SIMPLE_DEV_PM_OPS(wpan_phy_pm_ops, wpan_phy_suspend, wpan_phy_resume);
  97 #define WPAN_PHY_PM_OPS (&wpan_phy_pm_ops)
  98 #else
  99 #define WPAN_PHY_PM_OPS NULL
 100 #endif
 101
 102 struct class wpan_phy_class = {
 103         .name = "ieee802154",
 104         .dev_release = wpan_phy_release,
 105         .dev_groups = pmib_groups,
 106         .pm = WPAN_PHY_PM_OPS,
 107 };
 108
 109 int wpan_phy_sysfs_init(void)
 110 {
 111         return class_register(&wpan_phy_class);
 112 }
 113
 114 void wpan_phy_sysfs_exit(void)
 115 {
 116         class_unregister(&wpan_phy_class);
 117 }