LXR linux/drivers/pps/sysfs.c

   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
  32static 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}
  44static DEVICE_ATTR_RO(assert);
  45
  46static 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}
  58static DEVICE_ATTR_RO(clear);
  59
  60static 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}
  67static DEVICE_ATTR_RO(mode);
  68
  69static 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}
  76static DEVICE_ATTR_RO(echo);
  77
  78static 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}
  85static DEVICE_ATTR_RO(name);
  86
  87static 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}
  94static DEVICE_ATTR_RO(path);
  95
  96static 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
 106static const struct attribute_group pps_group = {
 107        .attrs = pps_attrs,
 108};
 109
 110const struct attribute_group *pps_groups[] = {
 111        &pps_group,
 112        NULL,
 113};
 114