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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 | ||
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 | ||
90 | struct 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 | }; |