Fixed MTP to work with TWRP

drivers/sensors/Kconfig

@@ -0,0 +1,344 @@
+#
+# Sensor  drivers configuration
+#
+
+menuconfig SENSORS
+	bool "Sensor devices"
+	help
+	  Say Y here, and a list of sensors drivers will be displayed.
+	  Everything that didn't fit into the other categories is here. This option
+	  doesn't affect the kernel.
+
+
+config SENSORS_K2HH
+	depends on I2C
+	tristate "SENSORS_K2HH"
+	default n
+	help
+	  Say Y here if you use SENSORS_K2HH.
+	  This option enables accelerometer sensors using
+	  STMicroelectronic K2HH device driver.
+
+config SENSORS_K2HH_VDD
+	depends on SENSORS_K2HH
+	tristate "SENSORS_K2HH_VDD"
+	default n
+	help
+	  Say Y here if you use SENSORS_K2HH_VDD.
+	  This option enables accelerometer sensors using VDD.
+
+config SENSORS_PPSX60
+	tristate "PARTRON & TI PPSX60 HRM Sensor"
+	default n
+	depends on I2C
+	help
+	  If you say yes here you get support for the PPSX60
+	  HRM sensor.
+	  This driver can also be built as a module.  If so, the module
+	  will be called PPSX60.
+
+config SENSORS_BH1733
+	depends on I2C
+	tristate "BH1733 driver"
+	default n
+	help
+	  Say Y here if you use bh1733.
+	  This option enables light sensors using
+	  Rohm bh1733 device driver.
+
+config SENSORS_CM3323
+	depends on I2C
+	tristate "CM3323 driver"
+	default n
+	help
+	  Say Y here if you use cm3323.
+	  This option enables RGB sensors using
+	  Capella cm3323 device driver.
+	  Say N here if you do not use cm3323.
+
+config SENSORS_CM36652
+	depends on I2C
+	tristate "CM36652 driver"
+	default n
+	help
+	  This option enables proximity & light sensors using CM36652 driver.
+
+config SENSORS_CM36652_LEDA_EN_GPIO
+	depends on I2C
+	tristate "CM36652 leda_en controlled by GPIO"
+	default n
+	help
+	  This option enables leda_en controlled by GPIO using CM36652 driver.
+
+config SENSORS_CM36652_SENSOR_EN_GPIO
+	depends on I2C
+	tristate "CM36652 sensor_en controlled by GPIO"
+	default n
+	help
+	  This option enables leda_en controlled by GPIO using CM36652 driver.
+
+config SENSORS_CM36655
+	depends on I2C
+	tristate "CM36655 driver"
+	default n
+	help
+	  This option enables proximity & light sensors using CM36655 driver.
+
+config SENSORS_CM36655_LEDA_EN_GPIO
+	depends on I2C
+	tristate "CM36655 leda_en controlled by GPIO"
+	default n
+	help
+	  This option enables leda_en controlled by GPIO using CM36655 driver.
+
+config SENSORS_CM36655_SENSOR_EN_GPIO
+	depends on I2C
+	tristate "CM36655 sensor_en controlled by GPIO"
+	default n
+	help
+	  This option enables leda_en controlled by GPIO using CM36655 driver.
+
+config SENSORS_TCS3490
+	depends on I2C
+	tristate "TCS3490 driver"
+	default n
+	help
+	  This option enables light sensor using TCS3490 driver.
+
+config SENSORS_TMD3782
+	depends on I2C
+	tristate "TMD3782 driver"
+	default n
+	help
+	   This option enables proximity & light sensors using TMD3782 driver.
+
+config SENSORS_TMD3782_PROX_ABS
+	depends on I2C
+	tristate "TMD3782 driver"
+	default n
+	help
+	   This option enables TMD3782 proximity sensor input report by ABS.
+
+config SENSORS_STK3013
+	depends on I2C
+	tristate "STK3013 driver"
+	default n
+	help
+	  This option enables proximity sensor using STK3013 driver.
+
+config SENSORS_SX9306
+	depends on I2C
+	tristate "SX9306 driver"
+	default n
+	help
+	 This option enables grip sensors using SemTech sx9306 device driver.
+
+config SENSORS_SX9306_NORMAL_TOUCH_THRESHOLD
+	int "SX9306 Grip sensor threshold for normal touch"
+	depends on SENSORS_SX9306
+	default "17"
+	help
+	  This value is the standard of normal touch using SemTech sx9306 device driver.
+
+config SENSORS_SX9306_WIFI
+	depends on I2C
+	tristate "SX9306 wifi driver"
+	default n
+	help
+	  This option enables grip sensors using
+	  SemTech sx9306 wifi device driver.
+
+config SENSORS_SX9310
+	depends on I2C
+	tristate "SX9310 driver"
+	default n
+	help
+	  Say Y here if you use sx9310.
+	  This option enables grip sensors using
+	  SemTech sx9310 device driver.
+	  Say N here if you do not use sx9310.
+
+config SENSORS_SX9310_INIT_TOUCH_THRESHOLD
+	int "SX9310 Grip sensor threshold for init touch"
+	depends on SENSORS_SX9310
+	default "3000"
+	help
+	  This value is the standard of init touch using
+	  SemTech sx9310 device driver.
+
+config SENSORS_SX9310_NORMAL_TOUCH_THRESHOLD
+	int "SX9310 Grip sensor threshold for normal touch"
+	depends on SENSORS_SX9310
+	default "193"
+	help
+	  This value is the standard of normal touch using
+	  SemTech sx9310 device driver.
+
+config SENSORS_SX9310_WIFI
+	depends on I2C
+	tristate "SX9310 driver"
+	default n
+	help
+	  Say Y here if you use sx9310.
+	  This option enables grip sensors using
+	  SemTech sx9310 device driver.
+	  Say N here if you do not use sx9310.
+
+config SENSORS_SX9310_WIFI_INIT_TOUCH_THRESHOLD
+	int "SX9310 Grip sensor threshold for init touch"
+	depends on SENSORS_SX9310_WIFI
+	default "3000"
+	help
+	  This value is the standard of init touch using
+	  SemTech sx9310 device driver.
+
+config SENSORS_SX9310_WIFI_NORMAL_TOUCH_THRESHOLD
+	int "SX9310 Grip sensor threshold for normal touch"
+	depends on SENSORS_SX9310_WIFI
+	default "17"
+	help
+	  This value is the standard of normal touch using
+	  SemTech sx9310 device driver.
+
+config SENSORS_SX9500
+	depends on I2C
+	tristate "SX9500 driver"
+	default n
+	help
+	  Say Y here if you use sx9500.
+	  This option enables grip sensors using
+	  SemTech sx9500 device driver.
+	  Say N here if you do not use sx9500.
+
+config SENSORS_SX9500_INIT_TOUCH_THRESHOLD
+	int "SX9500 Grip sensor threshold for init touch"
+	depends on SENSORS_SX9500
+	default "3000"
+	help
+	  This value is the standard of init touch using
+	  SemTech sx9500 device driver.
+
+config SENSORS_SX9500_NORMAL_TOUCH_THRESHOLD
+	int "SX9500 Grip sensor threshold for normal touch"
+	depends on SENSORS_SX9500
+	default "17"
+	help
+	  This value is the standard of normal touch using
+	  SemTech sx9500 device driver.
+
+config SENSORS_SX9500_TEMPERATURE_COMPENSATION
+	depends on SENSORS_SX9500
+	tristate "SX9500 Grip sensor temperature compensation"
+	default n
+	help
+	  Say Y here if you use temperature compensation code.
+	  This option enables grip sensors using
+	  temperature compensation code.
+
+config SENSORS_SX9500_REGULATOR_ONOFF
+	depends on SENSORS_SX9500
+	tristate "SX9500 Grip sensor Regulator"
+	default n
+	help
+	  Say Y here if you use regulator for grip sensor.
+	  This option enables regulator for grip sensor using
+	  SemTech sx9500 device driver.
+
+config SENSORS_SX9500_WIFI
+	depends on I2C
+	tristate "SX9500 driver for wifi"
+	default n
+	help
+	  Say Y here if you use sx9500 for wifi.
+	  This option enables grip sensors using
+	  SemTech sx9500 device driver for wifi.
+	  Say N here if you do not use sx9500 for wifi.
+
+config SENSORS_SX9500_WIFI_INIT_TOUCH_THRESHOLD
+	int "SX9500 Grip sensor threshold for init touch for wifi"
+	depends on SENSORS_SX9500_WIFI
+	default "3000"
+	help
+	  This value is the standard of init touch using
+	  SemTech sx9500 device driver for wifi.
+
+config SENSORS_SX9500_WIFI_NORMAL_TOUCH_THRESHOLD
+	int "SX9500 Grip sensor threshold for normal touch for wifi"
+	depends on SENSORS_SX9500_WIFI
+	default "17"
+	help
+	  This value is the standard of normal touch using
+	  SemTech sx9500 device driver for wifi.
+
+config SENSORS_SX9500_WIFI_TEMPERATURE_COMPENSATION
+	depends on SENSORS_SX9500_WIFI
+	tristate "SX9500 Grip sensor temperature compensation for wifi"
+	default n
+	help
+	  Say Y here if you use temperature compensation code.
+	  This option enables grip sensors using
+	  temperature compensation code.
+
+config SENSORS_SX9500_WIFI_REGULATOR_ONOFF
+	depends on SENSORS_SX9500_WIFI
+	tristate "SX9500 Grip sensor Regulator for WIFI"
+	default n
+	help
+	  Say Y here if you use regulator for grip sensor for WIFI.
+	  This option enables regulator for grip sensor using
+	  SemTech sx9500 device driver for WIFI.
+
+config SENSORS_MAX86900
+	tristate "MAXIM MAX86900 HRM Sensor"
+	default n
+	depends on I2C
+	help
+	  If you say yes here you get support for the MAX86900
+	  HRM sensor.
+	  This driver can also be built as a module.  If so, the module
+	  will be called max86900.
+
+config SENSORS_MAX86902
+	tristate "MAXIM MAX86902 HRM & UV Sensor"
+	default n
+	depends on I2C
+	help
+	  If you say yes here you get support for the MAX86902
+	  HRM & UV sensor.
+	  This driver can also be built as a module.	If so, the module
+	  will be called max86902.
+
+config SENSORS_BMA2X2
+	tristate "BMA255/BMA250E/BMA222E/BMA280 acceleration sensor support"
+	depends on I2C
+	help
+	  If you say yes here you get support for Bosch Sensortec's
+	  acceleration sensors BMA255/BMA250E/BMA222E/BMA280.
+
+config SENSORS_BMA2X2_ENABLE_INT1
+	tristate "BMA2X2 acceleration sensor interrupt INT1 support"
+	depends on SENSORS_BMA2X2
+	help
+	 If you say yes here, you get INT1 support for Bosch Sensortec
+	 acceleration sensors BMA255/BMA254/BMA355/BMA250E/BMA222E/BMA280.
+
+config INPUT_BMA2x2_ACC_ALERT_INT
+	tristate "BMA255/BMA250E/BMA222E/BMA280 acceleration sensor support"
+	depends on I2C=y
+	help
+	  If you say yes here you get support for Bosch Sensortec's
+	  acceleration sensors BMA255/BMA250E/BMA222E/BMA280.
+
+config SENSORS_BMM050
+	tristate "BMM050 Magnetic Sensor Driver"
+	depends on I2C
+	help
+	 BMM050 Magnetic Sensor Driver implemented by Bosch-Sensortec.
+
+config SENSORS_AK09916C
+	tristate "AK09916C compass support"
+	default n
+	depends on I2C
+	help
+	  If you say yes here you get support for Asahi Kasei's
+	  orientation sensor AK09916C.

drivers/sensors/Makefile

@@ -0,0 +1,34 @@
+#
+# Makefile for the sensors drivers.
+#
+
+# Each configuration option enables a list of files.
+
+obj-$(CONFIG_SENSORS)          += sensors_core.o
+
+# accelerometer_sensor
+obj-$(CONFIG_SENSORS_K2HH)          += k2hh.o
+obj-$(CONFIG_SENSORS_BMA2X2)        += bma2x2.o
+# optical_sensor
+obj-$(CONFIG_SENSORS_BH1733)	    += bh1733.o
+obj-$(CONFIG_SENSORS_TCS3490)	    += tcs3490.o
+obj-$(CONFIG_SENSORS_CM3323)	    += cm3323.o
+obj-$(CONFIG_SENSORS_CM36652)	    += cm36652.o
+obj-$(CONFIG_SENSORS_CM36655)       += cm36655.o
+obj-$(CONFIG_SENSORS_TMD3782)       += tmd3782.o
+obj-$(CONFIG_SENSORS_STK3013)       += stk3013.o
+# grip_sensor
+obj-$(CONFIG_SENSORS_SX9306)        += sx9306.o
+obj-$(CONFIG_SENSORS_SX9306_WIFI)   += sx9306_wifi.o
+obj-$(CONFIG_SENSORS_SX9310)        += sx9310.o
+obj-$(CONFIG_SENSORS_SX9310_WIFI)   += sx9310_wifi.o
+obj-$(CONFIG_SENSORS_SX9500)        += sx9500.o
+obj-$(CONFIG_SENSORS_SX9500_WIFI)   += sx9500_wifi.o
+# hrm_sensor
+obj-$(CONFIG_SENSORS_PPSX60)		+= ppsx60.o
+obj-$(CONFIG_SENSORS_MAX86900)		+= max86900.o
+obj-$(CONFIG_SENSORS_MAX86902)		+= max86902.o
+# obj-$(CONFIG_SENSORS_MAX_NOTCHFILTER)	+= max_notchfilter/
+# magnetic_sensor
+obj-$(CONFIG_SENSORS_BMM050)	+= bmm050_driver.o bmm050.o
+obj-$(CONFIG_SENSORS_AK09916C)	+= ak09916c.o

drivers/sensors/sensors_core.c

@@ -0,0 +1,374 @@
+/*
+ * Copyright (C) 2013 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>
+#include <linux/input.h>
+#include <linux/sensor/sensors_core.h>
+
+#ifdef CONFIG_ADSP_FACTORY
+#include <linux/kernel.h>
+#endif
+struct class *sensors_class;
+struct class *sensors_event_class;
+static struct device *symlink_dev;
+static struct device *sensor_dev;
+static struct input_dev *meta_input_dev;
+
+static atomic_t sensor_count;
+
+struct axis_remap {
+	int src_x:3;
+	int src_y:3;
+	int src_z:3;
+
+	int sign_x:2;
+	int sign_y:2;
+	int sign_z:2;
+};
+
+/*!
+ * @Description:
+ * definitions of placement of sensors
+ * P0 - P3: view from top of device
+ * P4 - P7: view from bottom of device
+ *
+ * P0 / P4:
+ * Y of device aligned with Y of OS (i.e: Android)
+ *                  y
+ *                  ^
+ *                  |
+ *                  |
+ *                  |
+ *                  o------> x
+ *
+ *
+ * P1 / P5:
+ * Y of device aligned with Y of OS (i.e.: Android)
+ * rotated by 90 degrees clockwise
+ *
+ *                  o------> y
+ *                  |
+ *                  |
+ *                  |
+ *                  v x
+ *
+ *
+ * P2 / P6:
+ * Y of device aligned with Y of OS (i.e.: Android)
+ * rotated by 180 degrees clockwise
+ *
+ *         x <------o
+ *                  |
+ *                  |
+ *                  |
+ *                  v
+ *                  y
+ *
+ *
+ * P3 / P7:
+ * Y of device aligned with Y of OS (i.e.: Android)
+ * rotated by 270 degrees clockwise
+ *
+ *                  x
+ *                  ^
+ *                  |
+ *                  |
+ *                  |
+ *         y <------o
+ *
+ */
+
+#define MAX_AXIS_REMAP_TAB_SZ 8 /* P0~P7 */
+
+static const struct axis_remap axis_table[MAX_AXIS_REMAP_TAB_SZ] = {
+	/* src_x src_y src_z  sign_x  sign_y  sign_z */
+	{  0,    1,    2,     1,      1,      1 }, /* P0 */
+	{  1,    0,    2,     1,     -1,      1 }, /* P1 */
+	{  0,    1,    2,    -1,     -1,      1 }, /* P2 */
+	{  1,    0,    2,    -1,      1,      1 }, /* P3 */
+	{  0,    1,    2,    -1,      1,     -1 }, /* P4 */
+	{  1,    0,    2,    -1,     -1,     -1 }, /* P5 */
+	{  0,    1,    2,     1,     -1,     -1 }, /* P6 */
+	{  1,    0,    2,     1,      1,     -1 }, /* P7 */
+};
+
+void remap_sensor_data(s16 *val, u32 idx)
+{
+	s16 tmp[3];
+
+	if (idx < MAX_AXIS_REMAP_TAB_SZ) {
+		tmp[0] = val[axis_table[idx].src_x] * axis_table[idx].sign_x;
+		tmp[1] = val[axis_table[idx].src_y] * axis_table[idx].sign_y;
+		tmp[2] = val[axis_table[idx].src_z] * axis_table[idx].sign_z;
+
+		memcpy(val, &tmp, sizeof(tmp));
+	}
+}
+
+void remap_sensor_data_32(int *val, u32 idx)
+{
+	int tmp[3];
+
+	if (idx < MAX_AXIS_REMAP_TAB_SZ) {
+		tmp[0] = val[axis_table[idx].src_x] * axis_table[idx].sign_x;
+		tmp[1] = val[axis_table[idx].src_y] * axis_table[idx].sign_y;
+		tmp[2] = val[axis_table[idx].src_z] * axis_table[idx].sign_z;
+
+		memcpy(val, &tmp, sizeof(tmp));
+	}
+}
+
+int sensors_create_symlink(struct kobject *target, const char *name)
+{
+	int err = 0;
+
+	if (symlink_dev == NULL) {
+		pr_err("%s, symlink_dev is NULL!!!\n", __func__);
+		return err;
+	}
+
+	err = sysfs_create_link(&symlink_dev->kobj, target, name);
+	if (err < 0) {
+		pr_err("%s, %s failed!(%d)\n", __func__, name, err);
+		return err;
+	}
+
+	return err;
+}
+
+void sensors_remove_symlink(struct kobject *target, const char *name)
+{
+	if (symlink_dev == NULL)
+		pr_err("%s, symlink_dev is NULL!!!\n", __func__);
+	else
+		sysfs_delete_link(&symlink_dev->kobj, target, name);
+}
+
+static ssize_t set_flush(struct device *dev, struct device_attribute *attr,
+	const char *buf, size_t size)
+{
+	int64_t dTemp;
+	u8 sensor_type = 0;
+
+	if (kstrtoll(buf, 10, &dTemp) < 0)
+		return -EINVAL;
+
+	sensor_type = (u8)dTemp;
+
+	input_report_rel(meta_input_dev, REL_DIAL,
+		1);	/*META_DATA_FLUSH_COMPLETE*/
+	input_report_rel(meta_input_dev, REL_HWHEEL, sensor_type + 1);
+	input_sync(meta_input_dev);
+
+	pr_info("[SENSOR] flush %d", sensor_type);
+	return size;
+}
+
+static DEVICE_ATTR(flush, S_IWUSR | S_IWGRP, NULL, set_flush);
+
+static struct device_attribute *sensor_attr[] = {
+	&dev_attr_flush,
+	NULL,
+};
+
+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("[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 == NULL) {
+		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);
+	atomic_inc(&sensor_count);
+
+	return ret;
+}
+
+void sensors_unregister(struct device *dev,
+		struct device_attribute *attributes[])
+{
+	int i;
+
+	for (i = 0; attributes[i] != NULL; i++)
+		device_remove_file(dev, attributes[i]);
+}
+
+void destroy_sensor_class(void)
+{
+	if (sensors_class) {
+		device_destroy(sensors_class, sensor_dev->devt);
+		class_destroy(sensors_class);
+		sensor_dev = NULL;
+		sensors_class = NULL;
+	}
+
+	if (sensors_event_class) {
+		device_destroy(sensors_event_class, symlink_dev->devt);
+		class_destroy(sensors_event_class);
+		symlink_dev = NULL;
+		sensors_event_class = NULL;
+	}
+}
+
+#ifdef CONFIG_ADSP_FACTORY
+extern  struct class* get_adsp_sensor_class(void);
+#endif
+
+int sensors_input_init(void)
+{
+	int ret;
+
+	/* Meta Input Event Initialization */
+	meta_input_dev = input_allocate_device();
+	if (!meta_input_dev) {
+		pr_err("[SENSOR CORE] failed alloc meta dev\n");
+		return -ENOMEM;
+	}
+
+	meta_input_dev->name = "meta_event";
+	input_set_capability(meta_input_dev, EV_REL, REL_HWHEEL);
+	input_set_capability(meta_input_dev, EV_REL, REL_DIAL);
+
+	ret = input_register_device(meta_input_dev);
+	if (ret < 0) {
+		pr_err("[SENSOR CORE] failed register meta dev\n");
+		input_free_device(meta_input_dev);
+	}
+
+	ret = sensors_create_symlink(&meta_input_dev->dev.kobj,
+		meta_input_dev->name);
+	if (ret < 0) {
+		pr_err("[SENSOR CORE] failed create meta symlink\n");
+		input_unregister_device(meta_input_dev);
+		input_free_device(meta_input_dev);
+	}
+
+	return ret;
+}
+
+void sensors_input_clean(void)
+{
+	sensors_remove_symlink(&meta_input_dev->dev.kobj,
+		meta_input_dev->name);
+	input_unregister_device(meta_input_dev);
+	input_free_device(meta_input_dev);
+}
+
+static int __init sensors_class_init(void)
+{
+	pr_info("[SENSORS CORE] sensors_class_init\n");
+
+#ifdef CONFIG_ADSP_FACTORY
+	sensors_class = get_adsp_sensor_class();
+#else
+	sensors_class = class_create(THIS_MODULE, "sensors");
+	if (IS_ERR(sensors_class)) {
+		pr_err("%s, create sensors_class is failed.(err=%d)\n",
+			__func__, IS_ERR(sensors_class));
+		return PTR_ERR(sensors_class);
+	}
+#endif
+
+	/* For flush sysfs */
+	sensor_dev = device_create(sensors_class, NULL, 0, NULL,
+		"%s", "sensor_dev");
+	if (IS_ERR(sensor_dev)) {
+		pr_err("[SENSORS CORE] sensor_dev create failed![%d]\n",
+			IS_ERR(sensor_dev));
+
+		class_destroy(sensors_class);
+		return PTR_ERR(sensor_dev);
+	} else {
+		if ((device_create_file(sensor_dev, *sensor_attr)) < 0)
+			pr_err("[SENSOR CORE] failed flush device_file\n");
+	}
+
+	/* For symbolic link */
+	sensors_event_class = class_create(THIS_MODULE, "sensor_event");
+	if (IS_ERR(sensors_event_class)) {
+		pr_err("%s, create sensors_class is failed.(err=%d)\n",
+			__func__, IS_ERR(sensors_event_class));
+		class_destroy(sensors_class);
+		return PTR_ERR(sensors_event_class);
+	}
+
+	symlink_dev = device_create(sensors_event_class, NULL, 0, NULL,
+		"%s", "symlink");
+	if (IS_ERR(symlink_dev)) {
+		pr_err("[SENSORS CORE] symlink_dev create failed![%d]\n",
+			IS_ERR(symlink_dev));
+
+		class_destroy(sensors_class);
+		class_destroy(sensors_event_class);
+		return PTR_ERR(symlink_dev);
+	}
+
+	atomic_set(&sensor_count, 0);
+	sensors_class->dev_uevent = NULL;
+
+	sensors_input_init();
+
+	return 0;
+}
+
+static void __exit sensors_class_exit(void)
+{
+	if (meta_input_dev)
+		sensors_input_clean();
+
+	if (sensors_class || sensors_event_class) {
+		class_destroy(sensors_class);
+		sensors_class = NULL;
+		class_destroy(sensors_event_class);
+		sensors_event_class = NULL;
+	}
+}
+
+subsys_initcall(sensors_class_init);
+module_exit(sensors_class_exit);
+
+MODULE_DESCRIPTION("Universal sensors core class");
+MODULE_AUTHOR("Samsung Electronics");
+MODULE_LICENSE("GPL");