/*
 *  /driver/sensors/sensors_core.c
 *
 *  Copyright (C) 2011 Samsung Electronics Co.Ltd
 *
 *  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.
 */

#include <linux/module.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/err.h>
#include <linux/sensor/sensors_core.h>

struct class *sensors_class;

/**
* sensors_classdev_register - create new sensor device in sensors_class.
* @dev: The device to register.
*/
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) {
			printk(KERN_ERR"[SENSOR CORE] create_file attributes %d\n",
			     i);
		}
	}
}

struct device *sensors_classdev_register(char *sensors_name)
{
	struct device *dev;
	int retval = -ENODEV;

	dev = device_create(sensors_class, NULL, 0,
					NULL, "%s", sensors_name);
	if (IS_ERR(dev))
		return ERR_PTR(retval);

	printk(KERN_INFO "Registered sensors device: %s\n", sensors_name);
	return dev;
}
EXPORT_SYMBOL_GPL(sensors_classdev_register);

/**
* sensors_classdev_unregister - unregisters a object of sensor device.
*
*/
void sensors_classdev_unregister(struct device *dev)
{
	device_unregister(dev);
}
EXPORT_SYMBOL_GPL(sensors_classdev_unregister);

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);
		printk(KERN_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)
{
	device_unregister(dev);
}
EXPORT_SYMBOL_GPL(sensors_unregister);

static int __init sensors_class_init(void)
{
	sensors_class = class_create(THIS_MODULE, "sensors");
	if (IS_ERR(sensors_class)) {
		pr_err("Failed to create class(sensors)!\n");
		return PTR_ERR(sensors_class);
	}

	return 0;
}

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

subsys_initcall(sensors_class_init);
module_exit(sensors_class_exit);

MODULE_DESCRIPTION("Universal sensors core class");
MODULE_AUTHOR("Samsung Electronics");
MODULE_LICENSE("GPL");