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 assert_show(struct device * dev,struct device_attribute * attr,char * buf)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 clear_show(struct device * dev,struct device_attribute * attr,char * buf)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 mode_show(struct device * dev,struct device_attribute * attr,char * buf)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 echo_show(struct device * dev,struct device_attribute * attr,char * buf)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 name_show(struct device * dev,struct device_attribute * attr,char * buf)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 path_show(struct device * dev,struct device_attribute * attr,char * buf)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 }; 100