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/*
* Universal sensors core class
*
* Author : Ryunkyun Park <ryun.park@samsung.com>
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/fs.h>
#include <linux/err.h>
/* #include <linux/sensors_core.h> */
struct class *sensors_class;
static atomic_t sensor_count;
static DEFINE_MUTEX(sensors_mutex);
/**
* 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_info("[SENSOR CORE] fail!!! device_create_file" \
"( dev, 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);
}
mutex_lock(&sensors_mutex);
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);
atomic_inc(&sensor_count);
mutex_unlock(&sensors_mutex);
return 0;
}
void sensors_unregister(struct device *dev)
{
/* TODO : Unregister device */
}
static int __init sensors_class_init(void)
{
pr_info("[SENSORS CORE] sensors_class_init\n");
sensors_class = class_create(THIS_MODULE, "sensors");
if (IS_ERR(sensors_class))
return PTR_ERR(sensors_class);
atomic_set(&sensor_count, 0);
sensors_class->dev_uevent = NULL;
return 0;
}
static void __exit sensors_class_exit(void)
{
class_destroy(sensors_class);
}
EXPORT_SYMBOL_GPL(sensors_register);
EXPORT_SYMBOL_GPL(sensors_unregister);
/* exported for the APM Power driver, APM emulation */
EXPORT_SYMBOL_GPL(sensors_class);
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");
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