1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  *
4  * Authors:
5  * Alexander Aring <aar@pengutronix.de>
6  *
7  * Based on: net/wireless/sysfs.c
8  */
9 
10 #include <linux/device.h>
11 #include <linux/rtnetlink.h>
12 
13 #include <net/cfg802154.h>
14 
15 #include "core.h"
16 #include "sysfs.h"
17 #include "rdev-ops.h"
18 
19 static inline struct cfg802154_registered_device *
dev_to_rdev(struct device * dev)20 dev_to_rdev(struct device *dev)
21 {
22 	return container_of(dev, struct cfg802154_registered_device,
23 			    wpan_phy.dev);
24 }
25 
26 #define SHOW_FMT(name, fmt, member)					\
27 static ssize_t name ## _show(struct device *dev,			\
28 			     struct device_attribute *attr,		\
29 			     char *buf)					\
30 {									\
31 	return sprintf(buf, fmt "\n", dev_to_rdev(dev)->member);	\
32 }									\
33 static DEVICE_ATTR_RO(name)
34 
35 SHOW_FMT(index, "%d", wpan_phy_idx);
36 
name_show(struct device * dev,struct device_attribute * attr,char * buf)37 static ssize_t name_show(struct device *dev,
38 			 struct device_attribute *attr,
39 			 char *buf)
40 {
41 	struct wpan_phy *wpan_phy = &dev_to_rdev(dev)->wpan_phy;
42 
43 	return sprintf(buf, "%s\n", dev_name(&wpan_phy->dev));
44 }
45 static DEVICE_ATTR_RO(name);
46 
wpan_phy_release(struct device * dev)47 static void wpan_phy_release(struct device *dev)
48 {
49 	struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
50 
51 	cfg802154_dev_free(rdev);
52 }
53 
54 static struct attribute *pmib_attrs[] = {
55 	&dev_attr_index.attr,
56 	&dev_attr_name.attr,
57 	NULL,
58 };
59 ATTRIBUTE_GROUPS(pmib);
60 
61 #ifdef CONFIG_PM_SLEEP
wpan_phy_suspend(struct device * dev)62 static int wpan_phy_suspend(struct device *dev)
63 {
64 	struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
65 	int ret = 0;
66 
67 	if (rdev->ops->suspend) {
68 		rtnl_lock();
69 		ret = rdev_suspend(rdev);
70 		rtnl_unlock();
71 	}
72 
73 	return ret;
74 }
75 
wpan_phy_resume(struct device * dev)76 static int wpan_phy_resume(struct device *dev)
77 {
78 	struct cfg802154_registered_device *rdev = dev_to_rdev(dev);
79 	int ret = 0;
80 
81 	if (rdev->ops->resume) {
82 		rtnl_lock();
83 		ret = rdev_resume(rdev);
84 		rtnl_unlock();
85 	}
86 
87 	return ret;
88 }
89 
90 static SIMPLE_DEV_PM_OPS(wpan_phy_pm_ops, wpan_phy_suspend, wpan_phy_resume);
91 #define WPAN_PHY_PM_OPS (&wpan_phy_pm_ops)
92 #else
93 #define WPAN_PHY_PM_OPS NULL
94 #endif
95 
96 struct class wpan_phy_class = {
97 	.name = "ieee802154",
98 	.dev_release = wpan_phy_release,
99 	.dev_groups = pmib_groups,
100 	.pm = WPAN_PHY_PM_OPS,
101 };
102 
wpan_phy_sysfs_init(void)103 int wpan_phy_sysfs_init(void)
104 {
105 	return class_register(&wpan_phy_class);
106 }
107 
wpan_phy_sysfs_exit(void)108 void wpan_phy_sysfs_exit(void)
109 {
110 	class_unregister(&wpan_phy_class);
111 }
112