mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 22:53:55 +08:00
b01079be44
rtc-proc.c is not built as a module. Thus, rather than dealing with THIS_MODULE's reference count, we should deal with rtc->owner's reference count. Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
|
|
* 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);
|
|
}
|
|
#else
|
|
static 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(rtc->owner))
|
|
return -ENODEV;
|
|
|
|
ret = single_open(file, rtc_proc_show, rtc);
|
|
if (ret)
|
|
module_put(rtc->owner);
|
|
return ret;
|
|
}
|
|
|
|
static int rtc_proc_release(struct inode *inode, struct file *file)
|
|
{
|
|
int res = single_release(inode, file);
|
|
struct rtc_device *rtc = PDE_DATA(inode);
|
|
|
|
module_put(rtc->owner);
|
|
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);
|
|
}
|