Merge tag 'davinci-for-v5.3/soc' of git://git.kernel.org/pub/scm/linux/kernel/git...
[platform/kernel/linux-starfive.git] / lib / of-reconfig-notifier-error-inject.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 #include <linux/kernel.h>
3 #include <linux/module.h>
4 #include <linux/of.h>
5
6 #include "notifier-error-inject.h"
7
8 static int priority;
9 module_param(priority, int, 0);
10 MODULE_PARM_DESC(priority, "specify OF reconfig notifier priority");
11
12 static struct notifier_err_inject reconfig_err_inject = {
13         .actions = {
14                 { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ATTACH_NODE) },
15                 { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_DETACH_NODE) },
16                 { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_ADD_PROPERTY) },
17                 { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_REMOVE_PROPERTY) },
18                 { NOTIFIER_ERR_INJECT_ACTION(OF_RECONFIG_UPDATE_PROPERTY) },
19                 {}
20         }
21 };
22
23 static struct dentry *dir;
24
25 static int err_inject_init(void)
26 {
27         int err;
28
29         dir = notifier_err_inject_init("OF-reconfig",
30                 notifier_err_inject_dir, &reconfig_err_inject, priority);
31         if (IS_ERR(dir))
32                 return PTR_ERR(dir);
33
34         err = of_reconfig_notifier_register(&reconfig_err_inject.nb);
35         if (err)
36                 debugfs_remove_recursive(dir);
37
38         return err;
39 }
40
41 static void err_inject_exit(void)
42 {
43         of_reconfig_notifier_unregister(&reconfig_err_inject.nb);
44         debugfs_remove_recursive(dir);
45 }
46
47 module_init(err_inject_init);
48 module_exit(err_inject_exit);
49
50 MODULE_DESCRIPTION("OF reconfig notifier error injection module");
51 MODULE_LICENSE("GPL");
52 MODULE_AUTHOR("Akinobu Mita <akinobu.mita@gmail.com>");