Linux 4.1.16
[linux/fpc-iii.git] / drivers / pps / sysfs.c
blobaefb75d67094ce4fdd3da670438efbb515bd5037
1 /*
2 * PPS sysfs support
5 * Copyright (C) 2007-2009 Rodolfo Giometti <giometti@linux.it>
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.
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.
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.
23 #include <linux/device.h>
24 #include <linux/module.h>
25 #include <linux/string.h>
26 #include <linux/pps_kernel.h>
29 * Attribute functions
32 static ssize_t assert_show(struct device *dev, struct device_attribute *attr,
33 char *buf)
35 struct pps_device *pps = dev_get_drvdata(dev);
37 if (!(pps->info.mode & PPS_CAPTUREASSERT))
38 return 0;
40 return sprintf(buf, "%lld.%09d#%d\n",
41 (long long) pps->assert_tu.sec, pps->assert_tu.nsec,
42 pps->assert_sequence);
44 static DEVICE_ATTR_RO(assert);
46 static ssize_t clear_show(struct device *dev, struct device_attribute *attr,
47 char *buf)
49 struct pps_device *pps = dev_get_drvdata(dev);
51 if (!(pps->info.mode & PPS_CAPTURECLEAR))
52 return 0;
54 return sprintf(buf, "%lld.%09d#%d\n",
55 (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
56 pps->clear_sequence);
58 static DEVICE_ATTR_RO(clear);
60 static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
61 char *buf)
63 struct pps_device *pps = dev_get_drvdata(dev);
65 return sprintf(buf, "%4x\n", pps->info.mode);
67 static DEVICE_ATTR_RO(mode);
69 static ssize_t echo_show(struct device *dev, struct device_attribute *attr,
70 char *buf)
72 struct pps_device *pps = dev_get_drvdata(dev);
74 return sprintf(buf, "%d\n", !!pps->info.echo);
76 static DEVICE_ATTR_RO(echo);
78 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
79 char *buf)
81 struct pps_device *pps = dev_get_drvdata(dev);
83 return sprintf(buf, "%s\n", pps->info.name);
85 static DEVICE_ATTR_RO(name);
87 static ssize_t path_show(struct device *dev, struct device_attribute *attr,
88 char *buf)
90 struct pps_device *pps = dev_get_drvdata(dev);
92 return sprintf(buf, "%s\n", pps->info.path);
94 static DEVICE_ATTR_RO(path);
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,
106 static const struct attribute_group pps_group = {
107 .attrs = pps_attrs,
110 const struct attribute_group *pps_groups[] = {
111 &pps_group,
112 NULL,