blob: 4d74e4f4ff30e75468c186eab697ac7b6b889244 [file] [log] [blame]
* RTC subsystem, proc interface
* Copyright (C) 2005-06 Tower Technologies
* Author: Alessandro Zummo <>
* based on arch/arm/common/rtctime.c
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#include <linux/module.h>
#include <linux/rtc.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include "rtc-core.h"
#define NAME_SIZE 10
static bool is_rtc_hctosys(struct rtc_device *rtc)
int size;
char name[NAME_SIZE];
size = scnprintf(name, NAME_SIZE, "rtc%d", rtc->id);
if (size > NAME_SIZE)
return false;
return !strncmp(name, CONFIG_RTC_HCTOSYS_DEVICE, NAME_SIZE);
static bool is_rtc_hctosys(struct rtc_device *rtc)
return (rtc->id == 0);
static int rtc_proc_show(struct seq_file *seq, void *offset)
int err;
struct rtc_device *rtc = seq->private;
const struct rtc_class_ops *ops = rtc->ops;
struct rtc_wkalrm alrm;
struct rtc_time tm;
err = rtc_read_time(rtc, &tm);
if (err == 0) {
"rtc_time\t: %ptRt\n"
"rtc_date\t: %ptRd\n",
&tm, &tm);
err = rtc_read_alarm(rtc, &alrm);
if (err == 0) {
seq_printf(seq, "alrm_time\t: %ptRt\n", &alrm.time);
seq_printf(seq, "alrm_date\t: %ptRd\n", &alrm.time);
seq_printf(seq, "alarm_IRQ\t: %s\n",
alrm.enabled ? "yes" : "no");
seq_printf(seq, "alrm_pending\t: %s\n",
alrm.pending ? "yes" : "no");
seq_printf(seq, "update IRQ enabled\t: %s\n",
(rtc->uie_rtctimer.enabled) ? "yes" : "no");
seq_printf(seq, "periodic IRQ enabled\t: %s\n",
(rtc->pie_enabled) ? "yes" : "no");
seq_printf(seq, "periodic IRQ frequency\t: %d\n",
seq_printf(seq, "max user IRQ frequency\t: %d\n",
seq_printf(seq, "24hr\t\t: yes\n");
if (ops->proc)
ops->proc(rtc->dev.parent, seq);
return 0;
void rtc_proc_add_device(struct rtc_device *rtc)
if (is_rtc_hctosys(rtc))
proc_create_single_data("driver/rtc", 0, NULL, rtc_proc_show,
void rtc_proc_del_device(struct rtc_device *rtc)
if (is_rtc_hctosys(rtc))
remove_proc_entry("driver/rtc", NULL);