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 assert_show(struct device *dev, struct device_attribute *attr,
33 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}
44static DEVICE_ATTR_RO(assert);
45
46static ssize_t clear_show(struct device *dev, struct device_attribute *attr,
47 char *buf)
48{
49 struct pps_device *pps = dev_get_drvdata(dev);
50
51 if (!(pps->info.mode & PPS_CAPTURECLEAR))
52 return 0;
53
54 return sprintf(buf, "%lld.%09d#%d\n",
55 (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
56 pps->clear_sequence);
57}
58static DEVICE_ATTR_RO(clear);
59
60static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
61 char *buf)
62{
63 struct pps_device *pps = dev_get_drvdata(dev);
64
65 return sprintf(buf, "%4x\n", pps->info.mode);
66}
67static DEVICE_ATTR_RO(mode);
68
69static ssize_t echo_show(struct device *dev, struct device_attribute *attr,
70 char *buf)
71{
72 struct pps_device *pps = dev_get_drvdata(dev);
73
74 return sprintf(buf, "%d\n", !!pps->info.echo);
75}
76static DEVICE_ATTR_RO(echo);
77
78static ssize_t name_show(struct device *dev, struct device_attribute *attr,
79 char *buf)
80{
81 struct pps_device *pps = dev_get_drvdata(dev);
82
83 return sprintf(buf, "%s\n", pps->info.name);
84}
85static DEVICE_ATTR_RO(name);
86
87static ssize_t path_show(struct device *dev, struct device_attribute *attr,
88 char *buf)
89{
90 struct pps_device *pps = dev_get_drvdata(dev);
91
92 return sprintf(buf, "%s\n", pps->info.path);
93}
94static DEVICE_ATTR_RO(path);
95
96static struct attribute *pps_attrs[] = {
97 &dev_attr_assert.attr,
98 &dev_attr_clear.attr,
99 &dev_attr_mode.attr,
100 &dev_attr_echo.attr,
101 &dev_attr_name.attr,
102 &dev_attr_path.attr,
103 NULL,
104};
105
106static const struct attribute_group pps_group = {
107 .attrs = pps_attrs,
108};
109
110const struct attribute_group *pps_groups[] = {
111 &pps_group,
112 NULL,
113};
114