// SPDX-License-Identifier: GPL-2.0-or-later/* * PPS generators sysfs support * * Copyright (C) 2024 Rodolfo Giometti <giometti@enneenne.com> */ #include <linux/device.h>#include <linux/module.h>#include <linux/string.h>#include <linux/pps_gen_kernel.h> /* * Attribute functions */ static ssize_t system_show(struct device *dev, struct device_attribute *attr,				char *buf){	struct pps_gen_device *pps_gen = dev_get_drvdata(dev); 	return sysfs_emit(buf, "%d\n", pps_gen->info->use_system_clock);}static DEVICE_ATTR_RO(system); static ssize_t time_show(struct device *dev, struct device_attribute *attr,				char *buf){	struct pps_gen_device *pps_gen = dev_get_drvdata(dev);	struct timespec64 time;	int ret; 	ret = pps_gen->info->get_time(pps_gen, &time);	if (ret)		return ret; 	return sysfs_emit(buf, "%llu %09lu\n", time.tv_sec, time.tv_nsec);}static DEVICE_ATTR_RO(time); static ssize_t enable_store(struct device *dev, struct device_attribute *attr,				const char *buf, size_t count){	struct pps_gen_device *pps_gen = dev_get_drvdata(dev);	bool status;	int ret; 	ret = kstrtobool(buf, &status);	if (ret)		return ret; 	ret = pps_gen->info->enable(pps_gen, status);	if (ret)		return ret;	pps_gen->enabled = status; 	return count;}static DEVICE_ATTR_WO(enable); static struct attribute *pps_gen_attrs[] = {	&dev_attr_enable.attr,	&dev_attr_time.attr,	&dev_attr_system.attr,	NULL,}; static const struct attribute_group pps_gen_group = {	.attrs = pps_gen_attrs,}; const struct attribute_group *pps_gen_groups[] = {	&pps_gen_group,	NULL,};