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// 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,
};
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