linux-imx

/*

 * RTC subsystem, sysfs interface

 *

 * Copyright (C) 2005 Tower Technologies

 * Author: Alessandro Zummo <a.zummo@towertech.it>

 *

 * 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 "rtc-core.h"

​

​

/* device attributes */

​

/*

 * NOTE:  RTC times displayed in sysfs use the RTC's timezone.  That's

 * ideally UTC.  However, PCs that also boot to MS-Windows normally use

 * the local time and change to match daylight savings time.  That affects

 * attributes including date, time, since_epoch, and wakealarm.

 */

​

static ssize_t

name_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    return sprintf(buf, "%s %s\n", dev_driver_string(dev->parent),

               dev_name(dev->parent));

}

static DEVICE_ATTR_RO(name);

​

static ssize_t

date_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    ssize_t retval;

    struct rtc_time tm;

​

    retval = rtc_read_time(to_rtc_device(dev), &tm);

    if (retval)

        return retval;

​

    return sprintf(buf, "%ptRd\n", &tm);

}

static DEVICE_ATTR_RO(date);

​

static ssize_t

time_show(struct device *dev, struct device_attribute *attr, char *buf)

{

    ssize_t retval;

    struct rtc_time tm;

​

    retval = rtc_read_time(to_rtc_device(dev), &tm);

    if (retval)

        return retval;

​

    return sprintf(buf, "%ptRt\n", &tm);

}

static DEVICE_ATTR_RO(time);

​

static ssize_t