linux/drivers/pps/sysfs.c
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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
  32static ssize_t pps_show_assert(struct device *dev,
  33                                struct device_attribute *attr, 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
  45static ssize_t pps_show_clear(struct device *dev,
  46                                struct device_attribute *attr, char *buf)
  47{
  48        struct pps_device *pps = dev_get_drvdata(dev);
  49
  50        if (!(pps->info.mode & PPS_CAPTURECLEAR))
  51                return 0;
  52
  53        return sprintf(buf, "%lld.%09d#%d\n",
  54                        (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
  55                        pps->clear_sequence);
  56}
  57
  58static ssize_t pps_show_mode(struct device *dev,
  59                                struct device_attribute *attr, char *buf)
  60{
  61        struct pps_device *pps = dev_get_drvdata(dev);
  62
  63        return sprintf(buf, "%4x\n", pps->info.mode);
  64}
  65
  66static ssize_t pps_show_echo(struct device *dev,
  67                                struct device_attribute *attr, char *buf)
  68{
  69        struct pps_device *pps = dev_get_drvdata(dev);
  70
  71        return sprintf(buf, "%d\n", !!pps->info.echo);
  72}
  73
  74static ssize_t pps_show_name(struct device *dev,
  75                                struct device_attribute *attr, char *buf)
  76{
  77        struct pps_device *pps = dev_get_drvdata(dev);
  78
  79        return sprintf(buf, "%s\n", pps->info.name);
  80}
  81
  82static ssize_t pps_show_path(struct device *dev,
  83                                struct device_attribute *attr, char *buf)
  84{
  85        struct pps_device *pps = dev_get_drvdata(dev);
  86
  87        return sprintf(buf, "%s\n", pps->info.path);
  88}
  89
  90struct device_attribute pps_attrs[] = {
  91        __ATTR(assert, S_IRUGO, pps_show_assert, NULL),
  92        __ATTR(clear, S_IRUGO, pps_show_clear, NULL),
  93        __ATTR(mode, S_IRUGO, pps_show_mode, NULL),
  94        __ATTR(echo, S_IRUGO, pps_show_echo, NULL),
  95        __ATTR(name, S_IRUGO, pps_show_name, NULL),
  96        __ATTR(path, S_IRUGO, pps_show_path, NULL),
  97        __ATTR_NULL,
  98};
  99
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