/* * PPS sysfs support * * * Copyright (C) 2007-2009 Rodolfo Giometti <giometti@linux.it> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <linux/device.h> #include <linux/module.h> #include <linux/string.h> #include <linux/pps_kernel.h> /* * Attribute functions */ static ssize_t assert_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); if (!(pps->info.mode & PPS_CAPTUREASSERT)) return 0; return sprintf(buf, "%lld.%09d#%d\n", (long long) pps->assert_tu.sec, pps->assert_tu.nsec, pps->assert_sequence); } static DEVICE_ATTR_RO(assert); static ssize_t clear_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); if (!(pps->info.mode & PPS_CAPTURECLEAR)) return 0; return sprintf(buf, "%lld.%09d#%d\n", (long long) pps->clear_tu.sec, pps->clear_tu.nsec, pps->clear_sequence); } static DEVICE_ATTR_RO(clear); static ssize_t mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); return sprintf(buf, "%4x\n", pps->info.mode); } static DEVICE_ATTR_RO(mode); static ssize_t echo_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); return sprintf(buf, "%d\n", !!pps->info.echo); } static DEVICE_ATTR_RO(echo); static ssize_t name_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); return sprintf(buf, "%s\n", pps->info.name); } static DEVICE_ATTR_RO(name); static ssize_t path_show(struct device *dev, struct device_attribute *attr, char *buf) { struct pps_device *pps = dev_get_drvdata(dev); return sprintf(buf, "%s\n", pps->info.path); } static DEVICE_ATTR_RO(path); static struct attribute *pps_attrs[] = { &dev_attr_assert.attr, &dev_attr_clear.attr, &dev_attr_mode.attr, &dev_attr_echo.attr, &dev_attr_name.attr, &dev_attr_path.attr, NULL, }; static const struct attribute_group pps_group = { .attrs = pps_attrs, }; const struct attribute_group *pps_groups[] = { &pps_group, NULL, };