Commit | Line | Data |
---|---|---|
c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
e2a7c3d7 LT |
2 | |
3 | #include <linux/kernel.h> | |
4 | #include <linux/module.h> | |
5 | #include <linux/init.h> | |
6 | #include <linux/acpi.h> | |
7 | #include <linux/types.h> | |
8 | #include <linux/proc_fs.h> | |
9 | #include <linux/seq_file.h> | |
10 | #include <acpi/acpi_bus.h> | |
11 | #include <acpi/acpi_drivers.h> | |
12 | ||
13 | #define PREFIX "ACPI: " | |
14 | ||
15 | ACPI_MODULE_NAME("cm_sbs"); | |
16 | #define ACPI_AC_CLASS "ac_adapter" | |
17 | #define ACPI_BATTERY_CLASS "battery" | |
18 | #define _COMPONENT ACPI_SBS_COMPONENT | |
19 | static struct proc_dir_entry *acpi_ac_dir; | |
20 | static struct proc_dir_entry *acpi_battery_dir; | |
21 | ||
22 | static DEFINE_MUTEX(cm_sbs_mutex); | |
23 | ||
24 | static int lock_ac_dir_cnt; | |
25 | static int lock_battery_dir_cnt; | |
26 | ||
27 | struct proc_dir_entry *acpi_lock_ac_dir(void) | |
28 | { | |
29 | mutex_lock(&cm_sbs_mutex); | |
30 | if (!acpi_ac_dir) | |
31 | acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); | |
32 | if (acpi_ac_dir) { | |
33 | lock_ac_dir_cnt++; | |
34 | } else { | |
35 | printk(KERN_ERR PREFIX | |
36 | "Cannot create %s\n", ACPI_AC_CLASS); | |
37 | } | |
38 | mutex_unlock(&cm_sbs_mutex); | |
39 | return acpi_ac_dir; | |
40 | } | |
41 | EXPORT_SYMBOL(acpi_lock_ac_dir); | |
42 | ||
43 | void acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir_param) | |
44 | { | |
45 | mutex_lock(&cm_sbs_mutex); | |
46 | if (acpi_ac_dir_param) | |
47 | lock_ac_dir_cnt--; | |
48 | if (lock_ac_dir_cnt == 0 && acpi_ac_dir_param && acpi_ac_dir) { | |
49 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); | |
50 | acpi_ac_dir = NULL; | |
51 | } | |
52 | mutex_unlock(&cm_sbs_mutex); | |
53 | } | |
54 | EXPORT_SYMBOL(acpi_unlock_ac_dir); | |
55 | ||
56 | struct proc_dir_entry *acpi_lock_battery_dir(void) | |
57 | { | |
58 | mutex_lock(&cm_sbs_mutex); | |
59 | if (!acpi_battery_dir) { | |
60 | acpi_battery_dir = | |
61 | proc_mkdir(ACPI_BATTERY_CLASS, acpi_root_dir); | |
62 | } | |
63 | if (acpi_battery_dir) { | |
64 | lock_battery_dir_cnt++; | |
65 | } else { | |
66 | printk(KERN_ERR PREFIX | |
67 | "Cannot create %s\n", ACPI_BATTERY_CLASS); | |
68 | } | |
69 | mutex_unlock(&cm_sbs_mutex); | |
70 | return acpi_battery_dir; | |
71 | } | |
72 | EXPORT_SYMBOL(acpi_lock_battery_dir); | |
73 | ||
74 | void acpi_unlock_battery_dir(struct proc_dir_entry *acpi_battery_dir_param) | |
75 | { | |
76 | mutex_lock(&cm_sbs_mutex); | |
77 | if (acpi_battery_dir_param) | |
78 | lock_battery_dir_cnt--; | |
79 | if (lock_battery_dir_cnt == 0 && acpi_battery_dir_param | |
80 | && acpi_battery_dir) { | |
81 | remove_proc_entry(ACPI_BATTERY_CLASS, acpi_root_dir); | |
82 | acpi_battery_dir = NULL; | |
83 | } | |
84 | mutex_unlock(&cm_sbs_mutex); | |
85 | return; | |
86 | } | |
87 | EXPORT_SYMBOL(acpi_unlock_battery_dir); |