LXR linux/drivers/pps/sysfs.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * PPS sysfs support
   4 *
   5 * Copyright (C) 2007-2009   Rodolfo Giometti <giometti@linux.it>
   6 */
   7
   8
   9#include <linux/device.h>
  10#include <linux/module.h>
  11#include <linux/string.h>
  12#include <linux/pps_kernel.h>
  13
  14/*
  15 * Attribute functions
  16 */
  17
  18static ssize_t assert_show(struct device *dev, struct device_attribute *attr,
  19                           char *buf)
  20{
  21        struct pps_device *pps = dev_get_drvdata(dev);
  22
  23        if (!(pps->info.mode & PPS_CAPTUREASSERT))
  24                return 0;
  25
  26        return sprintf(buf, "%lld.%09d#%d\n",
  27                        (long long) pps->assert_tu.sec, pps->assert_tu.nsec,
  28                        pps->assert_sequence);
  29}
  30static DEVICE_ATTR_RO(assert);
  31
  32static ssize_t clear_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_CAPTURECLEAR))
  38                return 0;
  39
  40        return sprintf(buf, "%lld.%09d#%d\n",
  41                        (long long) pps->clear_tu.sec, pps->clear_tu.nsec,
  42                        pps->clear_sequence);
  43}
  44static DEVICE_ATTR_RO(clear);
  45
  46static ssize_t mode_show(struct device *dev, struct device_attribute *attr,
  47                         char *buf)
  48{
  49        struct pps_device *pps = dev_get_drvdata(dev);
  50
  51        return sprintf(buf, "%4x\n", pps->info.mode);
  52}
  53static DEVICE_ATTR_RO(mode);
  54
  55static ssize_t echo_show(struct device *dev, struct device_attribute *attr,
  56                         char *buf)
  57{
  58        struct pps_device *pps = dev_get_drvdata(dev);
  59
  60        return sprintf(buf, "%d\n", !!pps->info.echo);
  61}
  62static DEVICE_ATTR_RO(echo);
  63
  64static ssize_t name_show(struct device *dev, struct device_attribute *attr,
  65                         char *buf)
  66{
  67        struct pps_device *pps = dev_get_drvdata(dev);
  68
  69        return sprintf(buf, "%s\n", pps->info.name);
  70}
  71static DEVICE_ATTR_RO(name);
  72
  73static ssize_t path_show(struct device *dev, struct device_attribute *attr,
  74                         char *buf)
  75{
  76        struct pps_device *pps = dev_get_drvdata(dev);
  77
  78        return sprintf(buf, "%s\n", pps->info.path);
  79}
  80static DEVICE_ATTR_RO(path);
  81
  82static struct attribute *pps_attrs[] = {
  83        &dev_attr_assert.attr,
  84        &dev_attr_clear.attr,
  85        &dev_attr_mode.attr,
  86        &dev_attr_echo.attr,
  87        &dev_attr_name.attr,
  88        &dev_attr_path.attr,
  89        NULL,
  90};
  91
  92static const struct attribute_group pps_group = {
  93        .attrs = pps_attrs,
  94};
  95
  96const struct attribute_group *pps_groups[] = {
  97        &pps_group,
  98        NULL,
  99};
 100