| 1 | |
| 2 | |
| 3 | * PPS sysfs support
|
| 4 | *
|
| 5 | * Copyright (C) 2007-2009 Rodolfo Giometti <[email protected]>
|
| 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 | };
|