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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 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 | } | |
44 | static DEVICE_ATTR_RO(assert); | |
45 | ||
46 | static 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 | } | |
58 | static DEVICE_ATTR_RO(clear); | |
59 | ||
60 | static 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 | } | |
67 | static DEVICE_ATTR_RO(mode); | |
68 | ||
69 | static 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 | } | |
76 | static DEVICE_ATTR_RO(echo); | |
77 | ||
78 | static 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 | } | |
85 | static DEVICE_ATTR_RO(name); | |
86 | ||
87 | static 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 | } | |
94 | static DEVICE_ATTR_RO(path); | |
95 | ||
96 | static 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 | ||
106 | static const struct attribute_group pps_group = { | |
107 | .attrs = pps_attrs, | |
108 | }; | |
109 | ||
110 | const struct attribute_group *pps_groups[] = { | |
111 | &pps_group, | |
112 | NULL, | |
113 | }; |