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
19 #include "rtc-core.h"
20
21
rtc_proc_show(struct seq_file * seq,void * offset)22 static int rtc_proc_show(struct seq_file *seq, void *offset)
23 {
24 int err;
25 struct rtc_device *rtc = seq->private;
26 const struct rtc_class_ops *ops = rtc->ops;
27 struct rtc_wkalrm alrm;
28 struct rtc_time tm;
29
30 err = rtc_read_time(rtc, &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(rtc, &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 (alrm.time.tm_mday && (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, "alarm_IRQ\t: %s\n",
69 alrm.enabled ? "yes" : "no");
70 seq_printf(seq, "alrm_pending\t: %s\n",
71 alrm.pending ? "yes" : "no");
72 seq_printf(seq, "update IRQ enabled\t: %s\n",
73 (rtc->uie_rtctimer.enabled) ? "yes" : "no");
74 seq_printf(seq, "periodic IRQ enabled\t: %s\n",
75 (rtc->pie_enabled) ? "yes" : "no");
76 seq_printf(seq, "periodic IRQ frequency\t: %d\n",
77 rtc->irq_freq);
78 seq_printf(seq, "max user IRQ frequency\t: %d\n",
79 rtc->max_user_freq);
80 }
81
82 seq_printf(seq, "24hr\t\t: yes\n");
83
84 if (ops->proc)
85 ops->proc(rtc->dev.parent, seq);
86
87 return 0;
88 }
89
rtc_proc_open(struct inode * inode,struct file * file)90 static int rtc_proc_open(struct inode *inode, struct file *file)
91 {
92 int ret;
93 struct rtc_device *rtc = PDE(inode)->data;
94
95 if (!try_module_get(THIS_MODULE))
96 return -ENODEV;
97
98 ret = single_open(file, rtc_proc_show, rtc);
99 if (ret)
100 module_put(THIS_MODULE);
101 return ret;
102 }
103
rtc_proc_release(struct inode * inode,struct file * file)104 static int rtc_proc_release(struct inode *inode, struct file *file)
105 {
106 int res = single_release(inode, file);
107 module_put(THIS_MODULE);
108 return res;
109 }
110
111 static const struct file_operations rtc_proc_fops = {
112 .open = rtc_proc_open,
113 .read = seq_read,
114 .llseek = seq_lseek,
115 .release = rtc_proc_release,
116 };
117
rtc_proc_add_device(struct rtc_device * rtc)118 void rtc_proc_add_device(struct rtc_device *rtc)
119 {
120 if (rtc->id == 0)
121 proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);
122 }
123
rtc_proc_del_device(struct rtc_device * rtc)124 void rtc_proc_del_device(struct rtc_device *rtc)
125 {
126 if (rtc->id == 0)
127 remove_proc_entry("driver/rtc", NULL);
128 }
129