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
  18 static 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 }
  30 static DEVICE_ATTR_RO(assert);
  31
  32 static 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 }
  44 static DEVICE_ATTR_RO(clear);
  45
  46 static 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 }
  53 static DEVICE_ATTR_RO(mode);
  54
  55 static 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 }
  62 static DEVICE_ATTR_RO(echo);
  63
  64 static 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 }
  71 static DEVICE_ATTR_RO(name);
  72
  73 static 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 }
  80 static DEVICE_ATTR_RO(path);
  81
  82 static 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
  92 static const struct attribute_group pps_group = {
  93         .attrs = pps_attrs,
  94 };
  95
  96 const struct attribute_group *pps_groups[] = {
  97         &pps_group,
  98         NULL,
  99 };