drivers/pps/sysfs.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  * PPS sysfs support
0004  *
0005  * Copyright (C) 2007-2009   Rodolfo Giometti <giometti@linux.it>
0006  */
0007
0008
0009 #include <linux/device.h>
0010 #include <linux/module.h>
0011 #include <linux/string.h>
0012 #include <linux/pps_kernel.h>
0013
0014 /*
0015  * Attribute functions
0016  */
0017
0018 static ssize_t assert_show(struct device *dev, struct device_attribute *attr,
0019                char *buf)
0020 {
0021     struct pps_device *pps = dev_get_drvdata(dev);
0022
0023     if (!(pps->info.mode & PPS_CAPTUREASSERT))
0024         return 0;
0025
0026     return sprintf(buf, "%lld.%09d#%d\n",
0027             (long long) pps->assert_tu.sec, pps->assert_tu.nsec,
0028             pps->assert_sequence);
0029 }
0030 static DEVICE_ATTR_RO(assert);
0031
0032 static ssize_t clear_show(struct device *dev, struct device_attribute *attr,
0033               char *buf)
0034 {
0035     struct pps_device *pps = dev_get_drvdata(dev);
0036
0037     if (!(pps->info.mode & PPS_CAPTURECLEAR))
0038         return 0;
0039
0040     return sprintf(buf, "%lld.%09d#%d\n",
0041             (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
0042             pps->clear_sequence);
0043 }
0044 static DEVICE_ATTR_RO(clear);
0045
0046 static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
0047              char *buf)
0048 {
0049     struct pps_device *pps = dev_get_drvdata(dev);
0050
0051     return sprintf(buf, "%4x\n", pps->info.mode);
0052 }
0053 static DEVICE_ATTR_RO(mode);
0054
0055 static ssize_t echo_show(struct device *dev, struct device_attribute *attr,
0056              char *buf)
0057 {
0058     struct pps_device *pps = dev_get_drvdata(dev);
0059
0060     return sprintf(buf, "%d\n", !!pps->info.echo);
0061 }
0062 static DEVICE_ATTR_RO(echo);
0063
0064 static ssize_t name_show(struct device *dev, struct device_attribute *attr,
0065              char *buf)
0066 {
0067     struct pps_device *pps = dev_get_drvdata(dev);
0068
0069     return sprintf(buf, "%s\n", pps->info.name);
0070 }
0071 static DEVICE_ATTR_RO(name);
0072
0073 static ssize_t path_show(struct device *dev, struct device_attribute *attr,
0074              char *buf)
0075 {
0076     struct pps_device *pps = dev_get_drvdata(dev);
0077
0078     return sprintf(buf, "%s\n", pps->info.path);
0079 }
0080 static DEVICE_ATTR_RO(path);
0081
0082 static struct attribute *pps_attrs[] = {
0083     &dev_attr_assert.attr,
0084     &dev_attr_clear.attr,
0085     &dev_attr_mode.attr,
0086     &dev_attr_echo.attr,
0087     &dev_attr_name.attr,
0088     &dev_attr_path.attr,
0089     NULL,
0090 };
0091
0092 static const struct attribute_group pps_group = {
0093     .attrs = pps_attrs,
0094 };
0095
0096 const struct attribute_group *pps_groups[] = {
0097     &pps_group,
0098     NULL,
0099 };