xref: /openbmc/linux/drivers/pps/sysfs.c (revision d7a3d85e)
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 };
114