2 * RTC subsystem, proc interface
4 * Copyright (C) 2005-06 Tower Technologies
5 * Author: Alessandro Zummo <a.zummo@towertech.it>
7 * based on arch/arm/common/rtctime.c
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.
14 #include <linux/module.h>
15 #include <linux/rtc.h>
16 #include <linux/proc_fs.h>
17 #include <linux/seq_file.h>
22 static int rtc_proc_show(struct seq_file *seq, void *offset)
25 struct rtc_device *rtc = seq->private;
26 const struct rtc_class_ops *ops = rtc->ops;
27 struct rtc_wkalrm alrm;
30 err = rtc_read_time(rtc, &tm);
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);
39 err = rtc_read_alarm(rtc, &alrm);
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);
45 seq_printf(seq, "**:");
46 if ((unsigned int)alrm.time.tm_min <= 59)
47 seq_printf(seq, "%02d:", alrm.time.tm_min);
49 seq_printf(seq, "**:");
50 if ((unsigned int)alrm.time.tm_sec <= 59)
51 seq_printf(seq, "%02d\n", alrm.time.tm_sec);
53 seq_printf(seq, "**\n");
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);
59 seq_printf(seq, "****-");
60 if ((unsigned int)alrm.time.tm_mon <= 11)
61 seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
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);
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");
74 seq_printf(seq, "24hr\t\t: yes\n");
77 ops->proc(rtc->dev.parent, seq);
82 static int rtc_proc_open(struct inode *inode, struct file *file)
84 struct rtc_device *rtc = PDE(inode)->data;
86 if (!try_module_get(THIS_MODULE))
89 return single_open(file, rtc_proc_show, rtc);
92 static int rtc_proc_release(struct inode *inode, struct file *file)
94 int res = single_release(inode, file);
95 module_put(THIS_MODULE);
99 static const struct file_operations rtc_proc_fops = {
100 .open = rtc_proc_open,
103 .release = rtc_proc_release,
106 void rtc_proc_add_device(struct rtc_device *rtc)
109 struct proc_dir_entry *ent;
111 ent = create_proc_entry("driver/rtc", 0, NULL);
113 ent->proc_fops = &rtc_proc_fops;
114 ent->owner = rtc->owner;
120 void rtc_proc_del_device(struct rtc_device *rtc)
123 remove_proc_entry("driver/rtc", NULL);