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>
23 #if defined(CONFIG_RTC_HCTOSYS_DEVICE)
24 static bool is_rtc_hctosys(struct rtc_device *rtc)
29 size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id);
33 return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
36 static bool is_rtc_hctosys(struct rtc_device *rtc)
38 return (rtc->id == 0);
42 static int rtc_proc_show(struct seq_file *seq, void *offset)
45 struct rtc_device *rtc = seq->private;
46 const struct rtc_class_ops *ops = rtc->ops;
47 struct rtc_wkalrm alrm;
50 err = rtc_read_time(rtc, &tm);
53 "rtc_time\t: %02d:%02d:%02d\n"
54 "rtc_date\t: %04d-%02d-%02d\n",
55 tm.tm_hour, tm.tm_min, tm.tm_sec,
56 tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);
59 err = rtc_read_alarm(rtc, &alrm);
61 seq_printf(seq, "alrm_time\t: ");
62 if ((unsigned int)alrm.time.tm_hour <= 24)
63 seq_printf(seq, "%02d:", alrm.time.tm_hour);
65 seq_printf(seq, "**:");
66 if ((unsigned int)alrm.time.tm_min <= 59)
67 seq_printf(seq, "%02d:", alrm.time.tm_min);
69 seq_printf(seq, "**:");
70 if ((unsigned int)alrm.time.tm_sec <= 59)
71 seq_printf(seq, "%02d\n", alrm.time.tm_sec);
73 seq_printf(seq, "**\n");
75 seq_printf(seq, "alrm_date\t: ");
76 if ((unsigned int)alrm.time.tm_year <= 200)
77 seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);
79 seq_printf(seq, "****-");
80 if ((unsigned int)alrm.time.tm_mon <= 11)
81 seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);
83 seq_printf(seq, "**-");
84 if (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31)
85 seq_printf(seq, "%02d\n", alrm.time.tm_mday);
87 seq_printf(seq, "**\n");
88 seq_printf(seq, "alarm_IRQ\t: %s\n",
89 alrm.enabled ? "yes" : "no");
90 seq_printf(seq, "alrm_pending\t: %s\n",
91 alrm.pending ? "yes" : "no");
92 seq_printf(seq, "update IRQ enabled\t: %s\n",
93 (rtc->uie_rtctimer.enabled) ? "yes" : "no");
94 seq_printf(seq, "periodic IRQ enabled\t: %s\n",
95 (rtc->pie_enabled) ? "yes" : "no");
96 seq_printf(seq, "periodic IRQ frequency\t: %d\n",
98 seq_printf(seq, "max user IRQ frequency\t: %d\n",
102 seq_printf(seq, "24hr\t\t: yes\n");
105 ops->proc(rtc->dev.parent, seq);
110 static int rtc_proc_open(struct inode *inode, struct file *file)
113 struct rtc_device *rtc = PDE_DATA(inode);
115 if (!try_module_get(THIS_MODULE))
118 ret = single_open(file, rtc_proc_show, rtc);
120 module_put(THIS_MODULE);
124 static int rtc_proc_release(struct inode *inode, struct file *file)
126 int res = single_release(inode, file);
127 module_put(THIS_MODULE);
131 static const struct file_operations rtc_proc_fops = {
132 .open = rtc_proc_open,
135 .release = rtc_proc_release,
138 void rtc_proc_add_device(struct rtc_device *rtc)
140 if (is_rtc_hctosys(rtc))
141 proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);
144 void rtc_proc_del_device(struct rtc_device *rtc)
146 if (is_rtc_hctosys(rtc))
147 remove_proc_entry("driver/rtc", NULL);