/* /driver/sensors/core/sensors_core.c
 * Copyright (C) 2011 Samsung Electronics. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/err.h>


struct class *sensors_class;
EXPORT_SYMBOL_GPL(sensors_class);


/**
 * Create sysfs interface
 */
static void set_sensor_attr(struct device *dev,
	struct device_attribute *attributes[])
{
	int i;

	for (i = 0 ; attributes[i] != NULL ; i++) {
		if ((device_create_file(dev, attributes[i])) < 0)
			pr_err("Create_dev_file fail(attributes[%d] )\n", i);
	}
}

int sensors_register(struct device *dev, void * drvdata,
	struct device_attribute *attributes[], char *name)
{
	int ret = 0;

	if (!sensors_class) {
		sensors_class = class_create(THIS_MODULE, "sensors");
		if (IS_ERR(sensors_class))
			return PTR_ERR(sensors_class);
	}


	dev = device_create(sensors_class, NULL, 0, drvdata, "%s", name);

	if (IS_ERR(dev)) {
		ret = PTR_ERR(dev);
		pr_err("[SENSORS CORE] device_create failed! [%d]\n", ret);
		return ret;
	}

	set_sensor_attr(dev, attributes);


	return 0;
}
EXPORT_SYMBOL_GPL(sensors_register);

void sensors_unregister(struct device *dev,struct device_attribute *attributes[])
{
	int i;
 
    if (sensors_class != NULL) {
    	for (i = 0 ; attributes[i] != NULL ; i++)
    			device_remove_file(dev, attributes[i]);
	}
}
EXPORT_SYMBOL_GPL(sensors_unregister);

static int __init sensors_class_init(void)
{
	pr_debug("[SENSORS CORE] sensors_class_init\n");
	sensors_class = class_create(THIS_MODULE, "sensors");

	if (IS_ERR(sensors_class))
		return PTR_ERR(sensors_class);

	sensors_class->dev_uevent = NULL;

	return 0;
}

static void __exit sensors_class_exit(void)
{
	class_destroy(sensors_class);
}


/* exported for the APM Power driver, APM emulation */

subsys_initcall(sensors_class_init);
module_exit(sensors_class_exit);

MODULE_DESCRIPTION("Universal sensors core class");
MODULE_AUTHOR("Ryunkyun Park <ryun.park@samsung.com>");
MODULE_LICENSE("GPL");