Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * PPS sysfs support
3 *
4 *
5 * Copyright (C) 2007-2009 Rodolfo Giometti <giometti@linux.it>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22
23#include <linux/device.h>
24#include <linux/module.h>
25#include <linux/string.h>
26#include <linux/pps_kernel.h>
27
28/*
29 * Attribute functions
30 */
31
32static ssize_t pps_show_assert(struct device *dev,
33 struct device_attribute *attr, char *buf)
34{
35 struct pps_device *pps = dev_get_drvdata(dev);
36
37 if (!(pps->info.mode & PPS_CAPTUREASSERT))
38 return 0;
39
40 return sprintf(buf, "%lld.%09d#%d\n",
41 (long long) pps->assert_tu.sec, pps->assert_tu.nsec,
42 pps->assert_sequence);
43}
44
45static ssize_t pps_show_clear(struct device *dev,
46 struct device_attribute *attr, char *buf)
47{
48 struct pps_device *pps = dev_get_drvdata(dev);
49
50 if (!(pps->info.mode & PPS_CAPTURECLEAR))
51 return 0;
52
53 return sprintf(buf, "%lld.%09d#%d\n",
54 (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
55 pps->clear_sequence);
56}
57
58static ssize_t pps_show_mode(struct device *dev,
59 struct device_attribute *attr, char *buf)
60{
61 struct pps_device *pps = dev_get_drvdata(dev);
62
63 return sprintf(buf, "%4x\n", pps->info.mode);
64}
65
66static ssize_t pps_show_echo(struct device *dev,
67 struct device_attribute *attr, char *buf)
68{
69 struct pps_device *pps = dev_get_drvdata(dev);
70
71 return sprintf(buf, "%d\n", !!pps->info.echo);
72}
73
74static ssize_t pps_show_name(struct device *dev,
75 struct device_attribute *attr, char *buf)
76{
77 struct pps_device *pps = dev_get_drvdata(dev);
78
79 return sprintf(buf, "%s\n", pps->info.name);
80}
81
82static ssize_t pps_show_path(struct device *dev,
83 struct device_attribute *attr, char *buf)
84{
85 struct pps_device *pps = dev_get_drvdata(dev);
86
87 return sprintf(buf, "%s\n", pps->info.path);
88}
89
90struct device_attribute pps_attrs[] = {
91 __ATTR(assert, S_IRUGO, pps_show_assert, NULL),
92 __ATTR(clear, S_IRUGO, pps_show_clear, NULL),
93 __ATTR(mode, S_IRUGO, pps_show_mode, NULL),
94 __ATTR(echo, S_IRUGO, pps_show_echo, NULL),
95 __ATTR(name, S_IRUGO, pps_show_name, NULL),
96 __ATTR(path, S_IRUGO, pps_show_path, NULL),
97 __ATTR_NULL,
98};