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drivers/pps/sysfs.c
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LinuxPPS: core su...
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/*
* PPS sysfs support
*
*
* Copyright (C) 2007-2009 Rodolfo Giometti <giometti@linux.it>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/pps_kernel.h>
/*
* Attribute functions
*/
static ssize_t pps_show_assert(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
if (!(pps->info.mode & PPS_CAPTUREASSERT))
return 0;
return sprintf(buf, "%lld.%09d#%d
",
(long long) pps->assert_tu.sec, pps->assert_tu.nsec,
pps->assert_sequence);
}
static ssize_t pps_show_clear(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
if (!(pps->info.mode & PPS_CAPTURECLEAR))
return 0;
return sprintf(buf, "%lld.%09d#%d
",
(long long) pps->clear_tu.sec, pps->clear_tu.nsec,
pps->clear_sequence);
}
static ssize_t pps_show_mode(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
return sprintf(buf, "%4x
", pps->info.mode);
}
static ssize_t pps_show_echo(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
return sprintf(buf, "%d
", !!pps->info.echo);
}
static ssize_t pps_show_name(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
return sprintf(buf, "%s
", pps->info.name);
}
static ssize_t pps_show_path(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
return sprintf(buf, "%s
", pps->info.path);
}
struct device_attribute pps_attrs[] = {
__ATTR(assert, S_IRUGO, pps_show_assert, NULL),
__ATTR(clear, S_IRUGO, pps_show_clear, NULL),
__ATTR(mode, S_IRUGO, pps_show_mode, NULL),
__ATTR(echo, S_IRUGO, pps_show_echo, NULL),
__ATTR(name, S_IRUGO, pps_show_name, NULL),
__ATTR(path, S_IRUGO, pps_show_path, NULL),
__ATTR_NULL,
};
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