Linux Kernel  3.7.1
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sysfs.c
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1 /*
2  * PPS sysfs support
3  *
4  *
5  * Copyright (C) 2007-2009 Rodolfo Giometti <[email protected]>
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 
32 static 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 
45 static 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 
58 static 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 
66 static 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 
74 static 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 
82 static 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 
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),
98 };