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-rw-r--r--drivers/rtc/Kconfig11
-rw-r--r--drivers/rtc/Makefile2
-rw-r--r--drivers/rtc/rtc-proc.c162
3 files changed, 174 insertions, 1 deletions
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 824499920485..200fb06b788a 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -51,6 +51,17 @@ config RTC_INTF_SYSFS
51 This driver can also be built as a module. If so, the module 51 This driver can also be built as a module. If so, the module
52 will be called rtc-sysfs. 52 will be called rtc-sysfs.
53 53
54config RTC_INTF_PROC
55 tristate "proc"
56 depends on RTC_CLASS && PROC_FS
57 default RTC_CLASS
58 help
59 Say yes here if you want to use your RTC using the proc
60 interface, /proc/driver/rtc .
61
62 This driver can also be built as a module. If so, the module
63 will be called rtc-proc.
64
54comment "RTC drivers" 65comment "RTC drivers"
55 depends on RTC_CLASS 66 depends on RTC_CLASS
56 67
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index c44363355c2b..137aef0e29ab 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -8,4 +8,4 @@ obj-$(CONFIG_RTC_CLASS) += rtc-core.o
8rtc-core-y := class.o interface.o 8rtc-core-y := class.o interface.o
9 9
10obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o 10obj-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
11 11obj-$(CONFIG_RTC_INTF_PROC) += rtc-proc.o
diff --git a/drivers/rtc/rtc-proc.c b/drivers/rtc/rtc-proc.c
new file mode 100644
index 000000000000..90b8a97a0919
--- /dev/null
+++ b/drivers/rtc/rtc-proc.c
@@ -0,0 +1,162 @@
1/*
2 * RTC subsystem, proc interface
3 *
4 * Copyright (C) 2005-06 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
6 *
7 * based on arch/arm/common/rtctime.c
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12*/
13
14#include <linux/module.h>
15#include <linux/rtc.h>
16#include <linux/proc_fs.h>
17#include <linux/seq_file.h>
18
19static struct class_device *rtc_dev = NULL;
20static DEFINE_MUTEX(rtc_lock);
21
22static int rtc_proc_show(struct seq_file *seq, void *offset)
23{
24 int err;
25 struct class_device *class_dev = seq->private;
26 struct rtc_class_ops *ops = to_rtc_device(class_dev)->ops;
27 struct rtc_wkalrm alrm;
28 struct rtc_time tm;
29
30 err = rtc_read_time(class_dev, &tm);
31 if (err == 0) {
32 seq_printf(seq,
33 "rtc_time\t: %02d:%02d:%02d\n"
34 "rtc_date\t: %04d-%02d-%02d\n",
35 tm.tm_hour, tm.tm_min, tm.tm_sec,
36 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
37 }
38
39 err = rtc_read_alarm(class_dev, &alrm);
40 if (err == 0) {
41 seq_printf(seq, "alrm_time\t: ");
42 if ((unsigned int)alrm.time.tm_hour <= 24)
43 seq_printf(seq, "%02d:", alrm.time.tm_hour);
44 else
45 seq_printf(seq, "**:");
46 if ((unsigned int)alrm.time.tm_min <= 59)
47 seq_printf(seq, "%02d:", alrm.time.tm_min);
48 else
49 seq_printf(seq, "**:");
50 if ((unsigned int)alrm.time.tm_sec <= 59)
51 seq_printf(seq, "%02d\n", alrm.time.tm_sec);
52 else
53 seq_printf(seq, "**\n");
54
55 seq_printf(seq, "alrm_date\t: ");
56 if ((unsigned int)alrm.time.tm_year <= 200)
57 seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
58 else
59 seq_printf(seq, "****-");
60 if ((unsigned int)alrm.time.tm_mon <= 11)
61 seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
62 else
63 seq_printf(seq, "**-");
64 if ((unsigned int)alrm.time.tm_mday <= 31)
65 seq_printf(seq, "%02d\n", alrm.time.tm_mday);
66 else
67 seq_printf(seq, "**\n");
68 seq_printf(seq, "alrm_wakeup\t: %s\n",
69 alrm.enabled ? "yes" : "no");
70 seq_printf(seq, "alrm_pending\t: %s\n",
71 alrm.pending ? "yes" : "no");
72 }
73
74 if (ops->proc)
75 ops->proc(class_dev->dev, seq);
76
77 return 0;
78}
79
80static int rtc_proc_open(struct inode *inode, struct file *file)
81{
82 struct class_device *class_dev = PDE(inode)->data;
83
84 if (!try_module_get(THIS_MODULE))
85 return -ENODEV;
86
87 return single_open(file, rtc_proc_show, class_dev);
88}
89
90static int rtc_proc_release(struct inode *inode, struct file *file)
91{
92 int res = single_release(inode, file);
93 module_put(THIS_MODULE);
94 return res;
95}
96
97static struct file_operations rtc_proc_fops = {
98 .open = rtc_proc_open,
99 .read = seq_read,
100 .llseek = seq_lseek,
101 .release = rtc_proc_release,
102};
103
104static int rtc_proc_add_device(struct class_device *class_dev,
105 struct class_interface *class_intf)
106{
107 mutex_lock(&rtc_lock);
108 if (rtc_dev == NULL) {
109 struct proc_dir_entry *ent;
110
111 rtc_dev = class_dev;
112
113 ent = create_proc_entry("driver/rtc", 0, NULL);
114 if (ent) {
115 struct rtc_device *rtc = to_rtc_device(class_dev);
116
117 ent->proc_fops = &rtc_proc_fops;
118 ent->owner = rtc->owner;
119 ent->data = class_dev;
120
121 dev_info(class_dev->dev, "rtc intf: proc\n");
122 }
123 else
124 rtc_dev = NULL;
125 }
126 mutex_unlock(&rtc_lock);
127
128 return 0;
129}
130
131static void rtc_proc_remove_device(struct class_device *class_dev,
132 struct class_interface *class_intf)
133{
134 mutex_lock(&rtc_lock);
135 if (rtc_dev == class_dev) {
136 remove_proc_entry("driver/rtc", NULL);
137 rtc_dev = NULL;
138 }
139 mutex_unlock(&rtc_lock);
140}
141
142static struct class_interface rtc_proc_interface = {
143 .add = &rtc_proc_add_device,
144 .remove = &rtc_proc_remove_device,
145};
146
147static int __init rtc_proc_init(void)
148{
149 return rtc_interface_register(&rtc_proc_interface);
150}
151
152static void __exit rtc_proc_exit(void)
153{
154 class_interface_unregister(&rtc_proc_interface);
155}
156
157module_init(rtc_proc_init);
158module_exit(rtc_proc_exit);
159
160MODULE_AUTHOR("Alessandro Zummo <a.zummo@towertech.it>");
161MODULE_DESCRIPTION("RTC class proc interface");
162MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-22 17:10:32 -0500