/* * RTC subsystem, proc interface * * Copyright (C) 2005-06 Tower Technologies * Author: Alessandro Zummo <a.zummo@towertech.it> * * 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 #if defined(CONFIG_RTC_HCTOSYS_DEVICE)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);}#elsestatic bool is_rtc_hctosys(struct rtc_device *rtc){	return (rtc->id == 0);}#endif 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) {		seq_printf(seq,			"rtc_time\t: %02d:%02d:%02d\n"			"rtc_date\t: %04d-%02d-%02d\n",			tm.tm_hour, tm.tm_min, tm.tm_sec,			tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday);	} 	err = rtc_read_alarm(rtc, &alrm);	if (err == 0) {		seq_printf(seq, "alrm_time\t: ");		if ((unsigned int)alrm.time.tm_hour <= 24)			seq_printf(seq, "%02d:", alrm.time.tm_hour);		else			seq_printf(seq, "**:");		if ((unsigned int)alrm.time.tm_min <= 59)			seq_printf(seq, "%02d:", alrm.time.tm_min);		else			seq_printf(seq, "**:");		if ((unsigned int)alrm.time.tm_sec <= 59)			seq_printf(seq, "%02d\n", alrm.time.tm_sec);		else			seq_printf(seq, "**\n"); 		seq_printf(seq, "alrm_date\t: ");		if ((unsigned int)alrm.time.tm_year <= 200)			seq_printf(seq, "%04d-", alrm.time.tm_year + 1900);		else			seq_printf(seq, "****-");		if ((unsigned int)alrm.time.tm_mon <= 11)			seq_printf(seq, "%02d-", alrm.time.tm_mon + 1);		else			seq_printf(seq, "**-");		if (alrm.time.tm_mday && (unsigned int)alrm.time.tm_mday <= 31)			seq_printf(seq, "%02d\n", alrm.time.tm_mday);		else			seq_printf(seq, "**\n");		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",			rtc->irq_freq);		seq_printf(seq, "max user IRQ frequency\t: %d\n",			rtc->max_user_freq);	} 	seq_printf(seq, "24hr\t\t: yes\n"); 	if (ops->proc)		ops->proc(rtc->dev.parent, seq); 	return 0;} static int rtc_proc_open(struct inode *inode, struct file *file){	int ret;	struct rtc_device *rtc = PDE_DATA(inode); 	if (!try_module_get(THIS_MODULE))		return -ENODEV; 	ret = single_open(file, rtc_proc_show, rtc);	if (ret)		module_put(THIS_MODULE);	return ret;} static int rtc_proc_release(struct inode *inode, struct file *file){	int res = single_release(inode, file);	module_put(THIS_MODULE);	return res;} static const struct file_operations rtc_proc_fops = {	.open		= rtc_proc_open,	.read		= seq_read,	.llseek		= seq_lseek,	.release	= rtc_proc_release,}; void rtc_proc_add_device(struct rtc_device *rtc){	if (is_rtc_hctosys(rtc))		proc_create_data("driver/rtc", 0, NULL, &rtc_proc_fops, rtc);} void rtc_proc_del_device(struct rtc_device *rtc){	if (is_rtc_hctosys(rtc))		remove_proc_entry("driver/rtc", NULL);}