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 22static 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 } 73 74 seq_printf(seq, "24hr\t\t: yes\n"); 75 76 if (ops->proc) 77 ops->proc(rtc->dev.parent, seq); 78 79 return 0; 80} 81 82static int rtc_proc_open(struct inode *inode, struct file *file) 83{ 84 struct rtc_device *rtc = PDE(inode)->data; 85 86 if (!try_module_get(THIS_MODULE)) 87 return -ENODEV; 88 89 return single_open(file, rtc_proc_show, rtc); 90} 91 92static int rtc_proc_release(struct inode *inode, struct file *file) 93{ 94 int res = single_release(inode, file); 95 module_put(THIS_MODULE); 96 return res; 97} 98 99static const struct file_operations rtc_proc_fops = { 100 .open = rtc_proc_open, 101 .read = seq_read, 102 .llseek = seq_lseek, 103 .release = rtc_proc_release, 104}; 105 106void rtc_proc_add_device(struct rtc_device *rtc) 107{ 108 if (rtc->id == 0) { 109 struct proc_dir_entry *ent; 110 111 ent = create_proc_entry("driver/rtc", 0, NULL); 112 if (ent) { 113 ent->proc_fops = &rtc_proc_fops; 114 ent->owner = rtc->owner; 115 ent->data = rtc; 116 } 117 } 118} 119 120void rtc_proc_del_device(struct rtc_device *rtc) 121{ 122 if (rtc->id == 0) 123 remove_proc_entry("driver/rtc", NULL); 124} 125