drivers/misc: remove unused akm8963 driver

Change-Id: I02f5827ae72ec307df363345a8971c2cd6bc8447
Signed-off-by: Tao Huang <huangtao@rock-chips.com>

1 files changed, 0 insertions, 1466 deletions

diff --git a/drivers/misc/akm8963.c b/drivers/misc/akm8963.c
deleted file mode 100644
index 3085e43b0c86..000000000000
--- a/drivers/misc/akm8963.c
+++ /dev/null
@@ -1,1466 +0,0 @@
-/* drivers/misc/akm8963.c - akm8963 compass driver
- *
- * Copyright (C) 2007-2008 HTC Corporation.
- * Author: Hou-Kun Chen <houkun.chen@gmail.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * 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.
- *
- */
-
-/*#define DEBUG*/
-/*#define VERBOSE_DEBUG*/
-
-#include <linux/device.h>
-#include <linux/interrupt.h>
-#include <linux/i2c.h>
-#include <linux/slab.h>
-#include <linux/irq.h>
-#include <linux/miscdevice.h>
-#include <linux/gpio.h>
-#include <linux/uaccess.h>
-#include <linux/delay.h>
-#include <linux/input.h>
-#include <linux/workqueue.h>
-#include <linux/freezer.h>
-#include <linux/akm8963.h>
-
-#define AKM8963_DEBUG_IF	0
-#define AKM8963_DEBUG_DATA	0
-
-#define AKM_ACCEL_ITEMS 3
-/* Wait timeout in millisecond */
-#define AKM8963_DRDY_TIMEOUT	100
-
-struct akm8963_data {
-	struct i2c_client	*i2c;
-	struct input_dev	*input;
-	struct device		*class_dev;
-	struct class		*compass;
-	struct delayed_work	work;
-
-	wait_queue_head_t	drdy_wq;
-	wait_queue_head_t	open_wq;
-
-	struct mutex sensor_mutex;
-	int8_t	sense_data[SENSOR_DATA_SIZE];
-	struct mutex accel_mutex;
-	int16_t	accel_data[AKM_ACCEL_ITEMS];
-
-	struct mutex	val_mutex;
-	uint32_t	enable_flag;
-	int64_t		delay[AKM_NUM_SENSORS];
-
-	atomic_t	active;
-	atomic_t	is_busy;
-	atomic_t	drdy;
-	atomic_t	suspend;
-
-	char layout;
-	char outbit;
-	int	irq;
-	int	rstn;
-};
-
-static struct akm8963_data *s_akm;
-
-
-
-/***** I2C I/O function ***********************************************/
-static int akm8963_i2c_rxdata(
-	struct i2c_client *i2c,
-	unsigned char *rxData,
-	int length)
-{
-	struct i2c_msg msgs[] = {
-	{
-		.addr = i2c->addr,
-		.flags = 0,
-		.len = 1,
-		.buf = rxData,
-		.scl_rate = 200*1000,
-	},
-	{
-		.addr = i2c->addr,
-		.flags = I2C_M_RD,
-		.len = length,
-		.buf = rxData,
-		.scl_rate = 200*1000,
-	}, };
-	unsigned char addr = rxData[0];
-
-	if (i2c_transfer(i2c->adapter, msgs, 2) < 0) {
-		dev_err(&i2c->dev, "%s: transfer failed.", __func__);
-		return -EIO;
-	}
-
-	dev_vdbg(&i2c->dev, "RxData: len=%02x, addr=%02x, data=%02x",
-		length, addr, rxData[0]);
-	return 0;
-}
-
-static int akm8963_i2c_txdata(
-	struct i2c_client *i2c,
-	unsigned char *txData,
-	int length)
-{
-	struct i2c_msg msg[] = {
-	{
-		.addr = i2c->addr,
-		.flags = 0,
-		.len = length,
-		.buf = txData,
-		.scl_rate = 200*1000,
-	}, };
-
-	if (i2c_transfer(i2c->adapter, msg, 1) < 0) {
-		dev_err(&i2c->dev, "%s: transfer failed.", __func__);
-		return -EIO;
-	}
-
-	dev_vdbg(&i2c->dev, "TxData: len=%02x, addr=%02x data=%02x",
-		length, txData[0], txData[1]);
-	return 0;
-}
-
-static int akm8963_i2c_check_device(
-	struct i2c_client *client)
-{
-	unsigned char buffer[2];
-	int err;
-
-	/* Set measure mode */
-	buffer[0] = AK8963_REG_WIA;
-	err = akm8963_i2c_rxdata(client, buffer, 1);
-	if (err < 0) {
-		dev_err(&client->dev,
-			"%s: Can not read WIA.", __func__);
-		return err;
-	}
-	/* Check read data */
-	if (buffer[0] != 0x48) {
-		dev_err(&client->dev,
-			"%s: The device is not AK8963.", __func__);
-		return -ENXIO;
-	}
-
-	//printk("========[%x] ,[%x]" , buffer[0],buffer[1]);
-	return err;
-}
-
-/***** akm miscdevice functions *************************************/
-static int AKECS_Open(struct inode *inode, struct file *file);
-static int AKECS_Release(struct inode *inode, struct file *file);
-static long AKECS_ioctl(struct file *file,
-		unsigned int cmd, unsigned long arg);
-
-static struct file_operations AKECS_fops = {
-	.owner = THIS_MODULE,
-	.open = AKECS_Open,
-	.release = AKECS_Release,
-	.unlocked_ioctl = AKECS_ioctl,
-};
-
-static struct miscdevice akm8963_dev = {
-	.minor = MISC_DYNAMIC_MINOR,
-	.name = "akm8963_dev",
-	.fops = &AKECS_fops,
-};
-
-static int AKECS_Set_CNTL1(
-	struct akm8963_data *akm,
-	unsigned char mode)
-{
-	unsigned char buffer[2];
-	int err;
-
-	/* Busy check */
-	if (atomic_cmpxchg(&akm->is_busy, 0, 1) != 0) {
-		dev_err(&akm->i2c->dev, "%s: device is busy.", __func__);
-		return -EBUSY;
-	}
-
-	/* Set flag */
-	atomic_set(&akm->drdy, 0);
-
-	/* Set measure mode */
-	buffer[0] = AK8963_REG_CNTL1;
-	buffer[1] = mode;
-	err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
-	if (err < 0) {
-		dev_err(&akm->i2c->dev, "%s: Can not set CNTL.", __func__);
-		atomic_set(&akm->is_busy, 0);
-	} else {
-		dev_dbg(&akm->i2c->dev, "Mode is set to (%d).", mode);
-	}
-
-	return err;
-}
-
-static int AKECS_Set_PowerDown(
-	struct akm8963_data *akm)
-{
-	unsigned char buffer[2];
-	int err;
-
-	/* Set measure mode */
-	buffer[0] = AK8963_REG_CNTL1;
-	buffer[1] = AK8963_MODE_POWERDOWN;
-	err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
-	if (err < 0) {
-		dev_err(&akm->i2c->dev,
-			"%s: Can not set to measurement mode.", __func__);
-		atomic_set(&akm->is_busy, 0);
-	} else {
-		dev_dbg(&akm->i2c->dev, "Powerdown mode is set.");
-	}
-
-	/* Set to initial status. */
-	atomic_set(&akm->is_busy, 0);
-	atomic_set(&akm->drdy, 0);
-
-	return err;
-}
-
-static int AKECS_Reset(
-	struct akm8963_data *akm,
-	int hard)
-{
-	unsigned char buffer[2];
-	int err = 0;
-
-	if (hard != 0) {
-		gpio_set_value(akm->rstn, 0);
-		udelay(5);
-		gpio_set_value(akm->rstn, 1);
-	} else {
-		/* Set measure mode */
-		buffer[0] = AK8963_REG_CNTL2;
-		buffer[1] = 0x01;
-		err = akm8963_i2c_txdata(akm->i2c, buffer, 2);
-		if (err < 0) {
-			dev_err(&akm->i2c->dev,
-				"%s: Can not set SRST bit.", __func__);
-		} else {
-			dev_dbg(&akm->i2c->dev, "Soft reset is done.");
-		}
-	}
-
-	/* Device will be accessible 100 us after */
-	udelay(100);
-
-	return err;
-}
-
-static int AKECS_SetMode(
-	struct akm8963_data *akm,
-	unsigned char mode)
-{
-	int err;
-
-	switch (mode & 0x0F) {
-	case AK8963_MODE_SNG_MEASURE:
-	case AK8963_MODE_SELF_TEST:
-	case AK8963_MODE_FUSE_ACCESS:
-		err = AKECS_Set_CNTL1(akm, mode);
-		if ((err >= 0) && (akm->irq == 0)) {
-			schedule_delayed_work(
-				&akm->work,
-				usecs_to_jiffies(AK8963_MEASUREMENT_TIME_US));
-		}
-		break;
-	case AK8963_MODE_POWERDOWN:
-		err = AKECS_Set_PowerDown(akm);
-		break;
-	default:
-		dev_err(&akm->i2c->dev,
-			"%s: Unknown mode(%d).", __func__, mode);
-		return -EINVAL;
-	}
-
-	/* wait at least 100us after changing mode */
-	udelay(100);
-
-	return err;
-}
-
-/* This function will block a process until the latest measurement
- * data is available.
- */
-static int AKECS_GetData(
-	struct akm8963_data *akm,
-	char *rbuf,
-	int size)
-{
-	int err;
-	err = wait_event_interruptible_timeout(
-			akm->drdy_wq,
-			atomic_read(&akm->drdy),
-			AKM8963_DRDY_TIMEOUT);
-
-	if (err < 0) {
-		dev_err(&akm->i2c->dev,
-			"%s: wait_event failed (%d).", __func__, err);
-		return -1;
-	}
-	if (!atomic_read(&akm->drdy)) {
-		dev_err(&akm->i2c->dev,
-			"%s: DRDY is not set.", __func__);
-		return -1;
-	}
-
-	mutex_lock(&akm->sensor_mutex);
-	memcpy(rbuf, akm->sense_data, size);
-	atomic_set(&akm->drdy, 0);
-	mutex_unlock(&akm->sensor_mutex);
-
-	return 0;
-}
-
-static void AKECS_SetYPR(
-	struct akm8963_data *akm,
-	int *rbuf)
-{
-	uint32_t ready;
-	dev_vdbg(&akm->i2c->dev, "AKM8963 %s: flag =0x%X", __func__,
-		rbuf[0]);
-	dev_vdbg(&akm->input->dev, "  Acceleration[LSB]: %6d,%6d,%6d stat=%d",
-		rbuf[1], rbuf[2], rbuf[3], rbuf[4]);
-	dev_vdbg(&akm->input->dev, "  Geomagnetism[LSB]: %6d,%6d,%6d stat=%d",
-		rbuf[5], rbuf[6], rbuf[7], rbuf[8]);
-	dev_vdbg(&akm->input->dev, "  Orientation[YPR] : %6d,%6d,%6d",
-		rbuf[9], rbuf[10], rbuf[11]);
-
-	/* No events are reported */
-	if (!rbuf[0]) {
-		dev_dbg(&akm->i2c->dev, "Don't waste a time.");
-		return;
-	}
-
-	mutex_lock(&akm->val_mutex);
-	ready = (akm->enable_flag & (uint32_t)rbuf[0]);
-	mutex_unlock(&akm->val_mutex);
-
-	/* Report acceleration sensor information */
-	if (ready & ACC_DATA_READY) {
-		input_report_abs(akm->input, ABS_X, rbuf[1]);
-		input_report_abs(akm->input, ABS_Y, rbuf[2]);
-		input_report_abs(akm->input, ABS_Z, rbuf[3]);
-		input_report_abs(akm->input, ABS_THROTTLE, rbuf[4]);
-	}
-	/* Report magnetic vector information */
-	if (ready & MAG_DATA_READY) {
-		input_report_abs(akm->input, ABS_RX, rbuf[5]);
-		input_report_abs(akm->input, ABS_RY, rbuf[6]);
-		input_report_abs(akm->input, ABS_RZ, rbuf[7]);
-		input_report_abs(akm->input, ABS_RUDDER, rbuf[8]);
-	}
-	/* Report orientation sensor information */
-	if (ready & ORI_DATA_READY) {
-		input_report_abs(akm->input, ABS_HAT0X, rbuf[9]);
-		input_report_abs(akm->input, ABS_HAT0Y, rbuf[10]);
-		input_report_abs(akm->input, ABS_HAT1X, rbuf[11]);
-		input_report_abs(akm->input, ABS_HAT1Y, rbuf[4]);
-	}
-
-	input_sync(akm->input);
-}
-
-static int AKECS_GetOpenStatus(
-	struct akm8963_data *akm)
-{
-	return wait_event_interruptible(
-			akm->open_wq, (atomic_read(&akm->active) != 0));
-}
-
-static int AKECS_GetCloseStatus(
-	struct akm8963_data *akm)
-{
-	return wait_event_interruptible(
-			akm->open_wq, (atomic_read(&akm->active) <= 0));
-}
-
-static int AKECS_Open(struct inode *inode, struct file *file)
-{
-	file->private_data = s_akm;
-	return nonseekable_open(inode, file);
-}
-
-static int AKECS_Release(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static long
-AKECS_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	void __user *argp = (void __user *)arg;
-	struct akm8963_data *akm = file->private_data;
-
-	/* NOTE: In this function the size of "char" should be 1-byte. */
-	char i2c_buf[RWBUF_SIZE];		/* for READ/WRITE */
-	int8_t sensor_buf[SENSOR_DATA_SIZE];/* for GETDATA */
-	int32_t ypr_buf[YPR_DATA_SIZE];	/* for SET_YPR */
-	int16_t acc_buf[3];				/* for GET_ACCEL */
-	int64_t delay[AKM_NUM_SENSORS];	/* for GET_DELAY */
-	char mode;			/* for SET_MODE*/
-	char layout;		/* for GET_LAYOUT */
-	char outbit;		/* for GET_OUTBIT */
-	int status;			/* for OPEN/CLOSE_STATUS */
-	int ret = -1;		/* Return value. */
-
-	switch (cmd) {
-	case ECS_IOCTL_READ:
-	case ECS_IOCTL_WRITE:
-		if (argp == NULL) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		if (copy_from_user(&i2c_buf, argp, sizeof(i2c_buf))) {
-			dev_err(&akm->i2c->dev, "copy_from_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_SET_MODE:
-		if (argp == NULL) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		if (copy_from_user(&mode, argp, sizeof(mode))) {
-			dev_err(&akm->i2c->dev, "copy_from_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_SET_YPR:
-		if (argp == NULL) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		if (copy_from_user(&ypr_buf, argp, sizeof(ypr_buf))) {
-			dev_err(&akm->i2c->dev, "copy_from_user failed.");
-			return -EFAULT;
-		}
-	case ECS_IOCTL_GETDATA:
-	case ECS_IOCTL_GET_OPEN_STATUS:
-	case ECS_IOCTL_GET_CLOSE_STATUS:
-	case ECS_IOCTL_GET_DELAY:
-	case ECS_IOCTL_GET_LAYOUT:
-	case ECS_IOCTL_GET_OUTBIT:
-	case ECS_IOCTL_GET_ACCEL:
-		/* Just check buffer pointer */
-		if (argp == NULL) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		break;
-		break;
-	default:
-		break;
-	}
-
-	switch (cmd) {
-	case ECS_IOCTL_READ:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_READ called.");
-		if ((i2c_buf[0] < 1) || (i2c_buf[0] > (RWBUF_SIZE-1))) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		ret = akm8963_i2c_rxdata(akm->i2c, &i2c_buf[1], i2c_buf[0]);
-		if (ret < 0)
-			return ret;
-		break;
-	case ECS_IOCTL_WRITE:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_WRITE called.");
-		if ((i2c_buf[0] < 2) || (i2c_buf[0] > (RWBUF_SIZE-1))) {
-			dev_err(&akm->i2c->dev, "invalid argument.");
-			return -EINVAL;
-		}
-		ret = akm8963_i2c_txdata(akm->i2c, &i2c_buf[1], i2c_buf[0]);
-		if (ret < 0)
-			return ret;
-		break;
-	case ECS_IOCTL_SET_MODE:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_SET_MODE called.");
-		ret = AKECS_SetMode(akm, mode);
-		if (ret < 0)
-			return ret;
-		break;
-	case ECS_IOCTL_GETDATA:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GETDATA called.");
-		ret = AKECS_GetData(akm, sensor_buf, SENSOR_DATA_SIZE);
-		if (ret < 0)
-			return ret;
-		break;
-	case ECS_IOCTL_SET_YPR:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_SET_YPR called.");
-		AKECS_SetYPR(akm, ypr_buf);
-		break;
-	case ECS_IOCTL_GET_OPEN_STATUS:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_OPEN_STATUS called.");
-		ret = AKECS_GetOpenStatus(akm);
-		if (ret < 0) {
-			dev_err(&akm->i2c->dev,
-				"Get Open returns error (%d).", ret);
-		}
-		break;
-	case ECS_IOCTL_GET_CLOSE_STATUS:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_CLOSE_STATUS called.");
-		ret = AKECS_GetCloseStatus(akm);
-		if (ret < 0) {
-			dev_err(&akm->i2c->dev,
-				"Get Close returns error (%d).", ret);
-		}
-		break;
-	case ECS_IOCTL_GET_DELAY:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_DELAY called.");
-		mutex_lock(&akm->val_mutex);
-		delay[0] = akm->delay[0];
-		delay[1] = akm->delay[1];
-		delay[2] = akm->delay[2];
-		mutex_unlock(&akm->val_mutex);
-		break;
-	case ECS_IOCTL_GET_LAYOUT:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_LAYOUT called.");
-		layout = akm->layout;
-		break;
-	case ECS_IOCTL_GET_OUTBIT:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_OUTBIT called.");
-		outbit = akm->outbit;
-		break;
-	case ECS_IOCTL_RESET:
-		ret = AKECS_Reset(akm, akm->rstn);
-		if (ret < 0)
-			return ret;
-		break;
-	case ECS_IOCTL_GET_ACCEL:
-		dev_vdbg(&akm->i2c->dev, "IOCTL_GET_ACCEL called.");
-		mutex_lock(&akm->accel_mutex);
-		acc_buf[0] = akm->accel_data[0];
-		acc_buf[1] = akm->accel_data[1];
-		acc_buf[2] = akm->accel_data[2];
-		mutex_unlock(&akm->accel_mutex);
-		break;
-	default:
-		return -ENOTTY;
-	}
-
-	switch (cmd) {
-	case ECS_IOCTL_READ:
-		if (copy_to_user(argp, &i2c_buf, i2c_buf[0]+1)) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GETDATA:
-		if (copy_to_user(argp, &sensor_buf, sizeof(sensor_buf))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GET_OPEN_STATUS:
-	case ECS_IOCTL_GET_CLOSE_STATUS:
-		status = atomic_read(&akm->active);
-		if (copy_to_user(argp, &status, sizeof(status))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GET_DELAY:
-		if (copy_to_user(argp, &delay, sizeof(delay))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GET_LAYOUT:
-		if (copy_to_user(argp, &layout, sizeof(layout))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GET_OUTBIT:
-		if (copy_to_user(argp, &outbit, sizeof(outbit))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	case ECS_IOCTL_GET_ACCEL:
-		if (copy_to_user(argp, &acc_buf, sizeof(acc_buf))) {
-			dev_err(&akm->i2c->dev, "copy_to_user failed.");
-			return -EFAULT;
-		}
-		break;
-	default:
-		break;
-	}
-
-	return 0;
-}
-
-/***** akm sysfs functions ******************************************/
-static int create_device_attributes(
-	struct device *dev,
-	struct device_attribute *attrs)
-{
-	int i;
-	int err = 0;
-
-	for (i = 0 ; NULL != attrs[i].attr.name ; ++i) {
-		err = device_create_file(dev, &attrs[i]);
-		if (0 != err)
-			break;
-	}
-
-	if (0 != err) {
-		for (; i >= 0 ; --i)
-			device_remove_file(dev, &attrs[i]);
-	}
-
-	return err;
-}
-
-static void remove_device_attributes(
-	struct device *dev,
-	struct device_attribute *attrs)
-{
-	int i;
-
-	for (i = 0 ; NULL != attrs[i].attr.name ; ++i)
-		device_remove_file(dev, &attrs[i]);
-}
-
-static int create_device_binary_attributes(
-	struct kobject *kobj,
-	struct bin_attribute *attrs)
-{
-	int i;
-	int err = 0;
-
-	err = 0;
-
-	for (i = 0 ; NULL != attrs[i].attr.name ; ++i) {
-		err = sysfs_create_bin_file(kobj, &attrs[i]);
-		if (0 != err)
-			break;
-	}
-
-	if (0 != err) {
-		for (; i >= 0 ; --i)
-			sysfs_remove_bin_file(kobj, &attrs[i]);
-	}
-
-	return err;
-}
-
-static void remove_device_binary_attributes(
-	struct kobject *kobj,
-	struct bin_attribute *attrs)
-{
-	int i;
-
-	for (i = 0 ; NULL != attrs[i].attr.name ; ++i)
-		sysfs_remove_bin_file(kobj, &attrs[i]);
-}
-
-static bool get_value_as_int(char const *buf, size_t size, int *value)
-{
-	long tmp;
-
-	if (size == 0)
-		return false;
-
-	/* maybe text format value */
-	if ((buf[0] == '0') && (size > 1)) {
-		if ((buf[1] == 'x') || (buf[1] == 'X')) {
-			/* hexadecimal format */
-			if (0 != strict_strtol(buf, 16, &tmp))
-				return false;
-		} else {
-			/* octal format */
-			if (0 != strict_strtol(buf, 8, &tmp))
-				return false;
-		}
-	} else {
-		/* decimal format */
-		if (0 != strict_strtol(buf, 10, &tmp))
-			return false;
-	}
-
-	if (tmp > INT_MAX)
-		return false;
-
-	*value = tmp;
-
-	return true;
-}
-
-static bool get_value_as_int64(char const *buf, size_t size, long long *value)
-{
-	long long tmp;
-
-	if (size == 0)
-		return false;
-
-	/* maybe text format value */
-	if ((buf[0] == '0') && (size > 1)) {
-		if ((buf[1] == 'x') || (buf[1] == 'X')) {
-			/* hexadecimal format */
-			if (0 != strict_strtoll(buf, 16, &tmp))
-				return false;
-		} else {
-			/* octal format */
-			if (0 != strict_strtoll(buf, 8, &tmp))
-				return false;
-		}
-	} else {
-		/* decimal format */
-		if (0 != strict_strtoll(buf, 10, &tmp))
-			return false;
-	}
-
-	if (tmp > LLONG_MAX)
-		return false;
-
-	*value = tmp;
-
-	return true;
-}
-
-/*********************************************************************
- *
- * SysFS attribute functions
- *
- * directory : /sys/class/compass/akm8963/
- * files :
- *  - enable_acc [rw] [t] : enable flag for accelerometer
- *  - enable_mag [rw] [t] : enable flag for magnetometer
- *  - enable_ori [rw] [t] : enable flag for orientation
- *  - delay_acc  [rw] [t] : delay in nanosecond for accelerometer
- *  - delay_mag  [rw] [t] : delay in nanosecond for magnetometer
- *  - delay_ori  [rw] [t] : delay in nanosecond for orientation
- *  - accel	     [w]  [b] : accelerometer data
- *
- * debug :
- *  - mode       [w]  [t] : AK8963's mode
- *  - bdata      [r]  [t] : raw data
- *  - asa        [r]  [t] : FUSEROM data
- *
- * [b] = binary format
- * [t] = text format
- */
-
-/***** sysfs enable *************************************************/
-static void akm8963_sysfs_update_active_status(
-	struct akm8963_data *akm)
-{
-	uint32_t en;
-	mutex_lock(&akm->val_mutex);
-	en = akm->enable_flag;
-	mutex_unlock(&akm->val_mutex);
-
-	if (en == 0) {
-		if (atomic_cmpxchg(&akm->active, 1, 0) == 1) {
-			wake_up(&akm->open_wq);
-			dev_dbg(akm->class_dev, "Deactivated");
-		}
-	} else {
-		if (atomic_cmpxchg(&akm->active, 0, 1) == 0) {
-			wake_up(&akm->open_wq);
-			dev_dbg(akm->class_dev, "Activated");
-		}
-	}
-	dev_dbg(&akm->i2c->dev,
-		"Status updated: enable=0x%X, active=%d",
-		en, atomic_read(&akm->active));
-}
-
-static ssize_t akm8963_sysfs_enable_show(
-	struct akm8963_data *akm, char *buf, int pos)
-{
-	int flag;
-
-	mutex_lock(&akm->val_mutex);
-	flag = ((akm->enable_flag >> pos) & 1);
-	mutex_unlock(&akm->val_mutex);
-
-	return sprintf(buf, "%d\n", flag);
-}
-
-static ssize_t akm8963_sysfs_enable_store(
-	struct akm8963_data *akm, char const *buf, size_t count, int pos)
-{
-	int en = 0;
-
-	if (NULL == buf)
-		return -EINVAL;
-
-	if (0 == count)
-		return 0;
-
-	if (false == get_value_as_int(buf, count, &en))
-		return -EINVAL;
-
-	en = en ? 1 : 0;
-
-	mutex_lock(&akm->val_mutex);
-	akm->enable_flag &= ~(1<<pos);
-	akm->enable_flag |= ((uint32_t)(en))<<pos;
-	mutex_unlock(&akm->val_mutex);
-
-	akm8963_sysfs_update_active_status(akm);
-
-	return count;
-}
-
-/***** Acceleration ***/
-static ssize_t akm8963_enable_acc_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_enable_show(
-		dev_get_drvdata(dev), buf, ACC_DATA_FLAG);
-}
-static ssize_t akm8963_enable_acc_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_enable_store(
-		dev_get_drvdata(dev), buf, count, ACC_DATA_FLAG);
-}
-
-/***** Magnetic field ***/
-static ssize_t akm8963_enable_mag_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_enable_show(
-		dev_get_drvdata(dev), buf, MAG_DATA_FLAG);
-}
-static ssize_t akm8963_enable_mag_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_enable_store(
-		dev_get_drvdata(dev), buf, count, MAG_DATA_FLAG);
-}
-
-/***** Orientation ***/
-static ssize_t akm8963_enable_ori_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_enable_show(
-		dev_get_drvdata(dev), buf, ORI_DATA_FLAG);
-}
-static ssize_t akm8963_enable_ori_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_enable_store(
-		dev_get_drvdata(dev), buf, count, ORI_DATA_FLAG);
-}
-
-/***** sysfs delay **************************************************/
-static ssize_t akm8963_sysfs_delay_show(
-	struct akm8963_data *akm, char *buf, int pos)
-{
-	int64_t val;
-
-	mutex_lock(&akm->val_mutex);
-	val = akm->delay[pos];
-	mutex_unlock(&akm->val_mutex);
-
-	return sprintf(buf, "%lld\n", val);
-}
-
-static ssize_t akm8963_sysfs_delay_store(
-	struct akm8963_data *akm, char const *buf, size_t count, int pos)
-{
-	long long val = 0;
-
-	if (NULL == buf)
-		return -EINVAL;
-
-	if (0 == count)
-		return 0;
-
-	if (false == get_value_as_int64(buf, count, &val))
-		return -EINVAL;
-
-	mutex_lock(&akm->val_mutex);
-	akm->delay[pos] = val;
-	mutex_unlock(&akm->val_mutex);
-
-	return count;
-}
-
-/***** Accelerometer ***/
-static ssize_t akm8963_delay_acc_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_delay_show(
-		dev_get_drvdata(dev), buf, ACC_DATA_FLAG);
-}
-static ssize_t akm8963_delay_acc_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_delay_store(
-		dev_get_drvdata(dev), buf, count, ACC_DATA_FLAG);
-}
-
-/***** Magnetic field ***/
-static ssize_t akm8963_delay_mag_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_delay_show(
-		dev_get_drvdata(dev), buf, MAG_DATA_FLAG);
-}
-static ssize_t akm8963_delay_mag_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_delay_store(
-		dev_get_drvdata(dev), buf, count, MAG_DATA_FLAG);
-}
-
-/***** Orientation ***/
-static ssize_t akm8963_delay_ori_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	return akm8963_sysfs_delay_show(
-		dev_get_drvdata(dev), buf, ORI_DATA_FLAG);
-}
-static ssize_t akm8963_delay_ori_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	return akm8963_sysfs_delay_store(
-		dev_get_drvdata(dev), buf, count, ORI_DATA_FLAG);
-}
-
-
-/***** accel (binary) ***/
-static ssize_t akm8963_bin_accel_write(
-	struct file *file,
-	struct kobject *kobj,
-	struct bin_attribute *attr,
-			char *buf,
-			loff_t pos,
-			size_t size)
-{
-	struct device *dev = container_of(kobj, struct device, kobj);
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	int16_t *accel_data;
-
-	if (size == 0)
-		return 0;
-
-	accel_data = (int16_t*)buf;
-
-	mutex_lock(&akm->accel_mutex);
-	akm->accel_data[0] = accel_data[0];
-	akm->accel_data[1] = accel_data[1];
-	akm->accel_data[2] = accel_data[2];
-	mutex_unlock(&akm->accel_mutex);
-
-	dev_vdbg(&akm->i2c->dev, "accel:%d,%d,%d\n",
-		accel_data[0], accel_data[1], accel_data[2]);
-
-	return size;
-}
-
-
-#ifdef AKM8963_DEBUG_IF
-static ssize_t akm8963_mode_store(
-	struct device *dev, struct device_attribute *attr,
-	char const *buf, size_t count)
-{
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	int mode = 0;
-
-	if (NULL == buf)
-		return -EINVAL;
-
-	if (0 == count)
-		return 0;
-
-	if (false == get_value_as_int(buf, count, &mode))
-		return -EINVAL;
-
-	if (AKECS_SetMode(akm, mode) < 0)
-		return -EINVAL;
-
-	return 1;
-}
-
-static ssize_t akm8963_bdata_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	char rbuf[SENSOR_DATA_SIZE];
-
-	mutex_lock(&akm->sensor_mutex);
-	memcpy(&rbuf, akm->sense_data, sizeof(rbuf));
-	mutex_unlock(&akm->sensor_mutex);
-
-	return sprintf(buf,
-		"0x%02X,0x%02X,0x%02X,0x%02X,"
-		"0x%02X,0x%02X,0x%02X,0x%02X\n",
-		rbuf[0],rbuf[1],rbuf[2],rbuf[3],
-		rbuf[4],rbuf[5],rbuf[6],rbuf[7]);
-}
-
-static ssize_t akm8963_asa_show(
-	struct device *dev, struct device_attribute *attr, char *buf)
-{
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	int err;
-	unsigned char asa[3];
-
-	err = AKECS_SetMode(akm, AK8963_MODE_FUSE_ACCESS);
-	if (err < 0)
-		return err;
-
-	asa[0] = AK8963_FUSE_ASAX;
-	err = akm8963_i2c_rxdata(akm->i2c, asa, 3);
-	if (err < 0)
-		return err;
-
-	err = AKECS_SetMode(akm, AK8963_MODE_POWERDOWN);
-	if (err < 0)
-		return err;
-
-	return sprintf(buf, "0x%02X,0x%02X,0x%02X\n",
-		asa[0], asa[1], asa[2]);
-}
-#endif
-
-static struct device_attribute akm8963_attributes[] = {
-	__ATTR(enable_acc, 0660, akm8963_enable_acc_show, akm8963_enable_acc_store),
-	__ATTR(enable_mag, 0660, akm8963_enable_mag_show, akm8963_enable_mag_store),
-	__ATTR(enable_ori, 0660, akm8963_enable_ori_show, akm8963_enable_ori_store),
-	__ATTR(delay_acc,  0660, akm8963_delay_acc_show,  akm8963_delay_acc_store),
-	__ATTR(delay_mag,  0660, akm8963_delay_mag_show,  akm8963_delay_mag_store),
-	__ATTR(delay_ori,  0660, akm8963_delay_ori_show,  akm8963_delay_ori_store),
-#ifdef AKM8963_DEBUG_IF
-	__ATTR(mode,  0220, NULL, akm8963_mode_store),
-	__ATTR(bdata, 0440, akm8963_bdata_show, NULL),
-	__ATTR(asa,   0440, akm8963_asa_show, NULL),
-#endif
-	__ATTR_NULL,
-};
-
-#define __BIN_ATTR(name_, mode_, size_, private_, read_, write_) \
-	{ \
-		.attr    = { .name = __stringify(name_), .mode = mode_ }, \
-		.size    = size_, \
-		.private = private_, \
-		.read    = read_, \
-		.write   = write_, \
-	}
-
-#define __BIN_ATTR_NULL \
-	{ \
-		.attr   = { .name = NULL }, \
-	}
-
-static struct bin_attribute akm8963_bin_attributes[] = {
-	__BIN_ATTR(accel, 0220, 6, NULL,
-				NULL, akm8963_bin_accel_write),
-	__BIN_ATTR_NULL
-};
-
-static char const *const compass_class_name = "compass";
-static char const *const akm8963_device_name = "akm8963";
-static char const *const device_link_name = "i2c";
-static dev_t const akm8963_device_dev_t = MKDEV(MISC_MAJOR, 240);
-
-static int create_sysfs_interfaces(struct akm8963_data *akm)
-{
-	int err;
-
-	if (NULL == akm)
-		return -EINVAL;
-
-	err = 0;
-
-	akm->compass = class_create(THIS_MODULE, compass_class_name);
-	if (IS_ERR(akm->compass)) {
-		err = PTR_ERR(akm->compass);
-		goto exit_class_create_failed;
-	}
-
-	akm->class_dev = device_create(
-						akm->compass,
-						NULL,
-						akm8963_device_dev_t,
-						akm,
-						akm8963_device_name);
-	if (IS_ERR(akm->class_dev)) {
-		err = PTR_ERR(akm->class_dev);
-		goto exit_class_device_create_failed;
-	}
-
-	err = sysfs_create_link(
-			&akm->class_dev->kobj,
-			&akm->i2c->dev.kobj,
-			device_link_name);
-	if (0 > err)
-		goto exit_sysfs_create_link_failed;
-
-	err = create_device_attributes(
-			akm->class_dev,
-			akm8963_attributes);
-	if (0 > err)
-		goto exit_device_attributes_create_failed;
-
-	err = create_device_binary_attributes(
-			&akm->class_dev->kobj,
-			akm8963_bin_attributes);
-	if (0 > err)
-		goto exit_device_binary_attributes_create_failed;
-
-	return err;
-
-exit_device_binary_attributes_create_failed:
-	remove_device_attributes(akm->class_dev, akm8963_attributes);
-exit_device_attributes_create_failed:
-	sysfs_remove_link(&akm->class_dev->kobj, device_link_name);
-exit_sysfs_create_link_failed:
-	device_destroy(akm->compass, akm8963_device_dev_t);
-exit_class_device_create_failed:
-	akm->class_dev = NULL;
-	class_destroy(akm->compass);
-exit_class_create_failed:
-	akm->compass = NULL;
-	return err;
-}
-
-static void remove_sysfs_interfaces(struct akm8963_data *akm)
-{
-	if (NULL == akm)
-		return;
-
-	if (NULL != akm->class_dev) {
-		remove_device_binary_attributes(
-			&akm->class_dev->kobj,
-			akm8963_bin_attributes);
-		remove_device_attributes(
-			akm->class_dev,
-			akm8963_attributes);
-		sysfs_remove_link(
-			&akm->class_dev->kobj,
-			device_link_name);
-		akm->class_dev = NULL;
-	}
-	if (NULL != akm->compass) {
-		device_destroy(
-			akm->compass,
-			akm8963_device_dev_t);
-		class_destroy(akm->compass);
-		akm->compass = NULL;
-	}
-}
-
-
-/***** akm input device functions ***********************************/
-static int akm8963_input_init(
-	struct input_dev **input)
-{
-	int err = 0;
-
-	/* Declare input device */
-	*input = input_allocate_device();
-	if (!*input)
-		return -ENOMEM;
-
-	/* Setup input device */
-	set_bit(EV_ABS, (*input)->evbit);
-	/* Accelerometer (720 x 16G)*/
-	input_set_abs_params(*input, ABS_X,
-			-11520, 11520, 0, 0);
-	input_set_abs_params(*input, ABS_Y,
-			-11520, 11520, 0, 0);
-	input_set_abs_params(*input, ABS_Z,
-			-11520, 11520, 0, 0);
-	input_set_abs_params(*input, ABS_THROTTLE,
-			0, 3, 0, 0);
-	/* Magnetic field (-81900, 81900) -> limited to 16bit*/
-	input_set_abs_params(*input, ABS_RX,
-			-32768, 32767, 0, 0);
-	input_set_abs_params(*input, ABS_RY,
-			-32768, 32767, 0, 0);
-	input_set_abs_params(*input, ABS_RZ,
-			-32768, 32767, 0, 0);
-	input_set_abs_params(*input, ABS_RUDDER,
-			0, 3, 0, 0);
-	/* Orientation (yaw:0,360 pitch:-180,180 roll:-90,90) */
-	input_set_abs_params(*input, ABS_HAT0X,
-			0, 23040, 0, 0);
-	input_set_abs_params(*input, ABS_HAT0Y,
-			-11520, 11520, 0, 0);
-	input_set_abs_params(*input, ABS_HAT1X,
-			-5760, 5760, 0, 0);
-	input_set_abs_params(*input, ABS_HAT1Y,
-			0, 3, 0, 0);
-
-	/* Set name */
-	(*input)->name = "compass";
-
-	/* Register */
-	err = input_register_device(*input);
-	if (err) {
-		input_free_device(*input);
-		return err;
-	}
-
-	return err;
-}
-
-/***** akm functions ************************************************/
-
-static irqreturn_t akm8963_irq(int irq, void *handle)
-{
-	struct akm8963_data *akm = handle;
-	char buffer[SENSOR_DATA_SIZE];
-	int err;
-	
-	memset(buffer, 0, sizeof(buffer));
-	buffer[0] = AK8963_REG_ST1;
-	err = akm8963_i2c_rxdata(akm->i2c, buffer, SENSOR_DATA_SIZE);
-	if (err < 0) {
-		dev_err(&akm->i2c->dev, "%s failed.", __func__);
-		goto work_func_end;
-	}
-	/* Check ST bit */
-	if ((buffer[0] & 0x01) != 0x01) {
-		dev_err(&akm->i2c->dev, "%s ST is not set.", __func__);
-		goto work_func_end;
-	}
-
-	mutex_lock(&akm->sensor_mutex);
-	memcpy(akm->sense_data, buffer, SENSOR_DATA_SIZE);
-	mutex_unlock(&akm->sensor_mutex);
-
-	atomic_set(&akm->drdy, 1);
-	atomic_set(&akm->is_busy, 0);
-	wake_up(&akm->drdy_wq);
-
-work_func_end:
-	return IRQ_HANDLED;
-}
-
-static void akm8963_delayed_work(struct work_struct *work)
-{
-	struct akm8963_data *akm = container_of(
-		work, struct akm8963_data, work.work);
-
-	akm8963_irq(akm->irq, akm);
-}
-
-static int akm8963_suspend(struct device *dev)
-{
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	dev_dbg(&akm->i2c->dev, "suspended\n");
-
-	return 0;
-}
-
-static int akm8963_resume(struct device *dev)
-{
-	struct akm8963_data *akm = dev_get_drvdata(dev);
-	dev_dbg(&akm->i2c->dev, "resumed\n");
-
-	return 0;
-}
-
-int akm8963_probe(struct i2c_client *client, const struct i2c_device_id *id)
-{
-	struct akm8963_platform_data *pdata;
-	int err = 0;
-	int i;
-
-	dev_dbg(&client->dev, "start probing.");
-
-	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
-		dev_err(&client->dev, "%s: check_functionality failed.", __func__);
-		err = -ENODEV;
-		goto exit0;
-	}
-
-	/* Allocate memory for driver data */
-	s_akm = kzalloc(sizeof(struct akm8963_data), GFP_KERNEL);
-	if (!s_akm) {
-		dev_err(&client->dev, "%s: memory allocation failed.", __func__);
-		err = -ENOMEM;
-		goto exit1;
-	}
-
-	/***** Set layout information *****/
-	pdata = client->dev.platform_data;
-	if (pdata) {
-		/* Platform data is available. copy its value to local. */
-		s_akm->layout = pdata->layout;
-		s_akm->outbit = pdata->outbit;
-		s_akm->rstn = pdata->gpio_RST;
-	} else {
-		/* Platform data is not available.
-		   Layout and Outbit information should be set by each application. */
-		dev_dbg(&client->dev, "%s: No platform data.", __func__);
-		s_akm->layout = 0;
-		s_akm->outbit = 0;
-		s_akm->rstn = 0;
-	}
-
-	/***** I2C initialization *****/
-	s_akm->i2c = client;
-	/* check connection */
-	err = akm8963_i2c_check_device(client);
-	if (err < 0)
-		goto exit2;
-	/* set client data */
-	i2c_set_clientdata(client, s_akm);
-
-
-	/***** input *****/
-	err = akm8963_input_init(&s_akm->input);
-	if (err) {
-		dev_err(&client->dev,
-			"%s: input_dev register failed", __func__);
-		goto exit3;
-	}
-	input_set_drvdata(s_akm->input, s_akm);
-
-
-	/**** initialize variables in akm8963_data *****/
-	init_waitqueue_head(&s_akm->drdy_wq);
-	init_waitqueue_head(&s_akm->open_wq);
-
-	mutex_init(&s_akm->sensor_mutex);
-	mutex_init(&s_akm->accel_mutex);
-	mutex_init(&s_akm->val_mutex);
-
-	atomic_set(&s_akm->active, 0);
-	atomic_set(&s_akm->is_busy, 0);
-	atomic_set(&s_akm->drdy, 0);
-	atomic_set(&s_akm->suspend, 0);
-
-	s_akm->enable_flag = 0;
-	for (i=0; i<AKM_NUM_SENSORS; i++)
-		s_akm->delay[i] = -1;
-
-
-	/***** IRQ setup *****/
-	s_akm->irq = client->irq;
-
-
-	if (s_akm->irq == 0) {
-		dev_dbg(&client->dev, "%s: IRQ is not set.", __func__);
-		/* Use timer to notify measurement end */
-		INIT_DELAYED_WORK(&s_akm->work, akm8963_delayed_work);
-	} else {
-		err = request_threaded_irq(
-				s_akm->irq,
-				NULL,
-				akm8963_irq,
-				IRQF_TRIGGER_HIGH|IRQF_ONESHOT,
-				dev_name(&client->dev),
-				s_akm);
-		if (err < 0) {
-			dev_err(&client->dev,
-				"%s: request irq failed.", __func__);
-			goto exit4;
-		}
-	}
-
-	/***** misc *****/
-	err = misc_register(&akm8963_dev);
-	if (err) {
-		dev_err(&client->dev,
-			"%s: akm8963_dev register failed", __func__);
-		goto exit5;
-	}
-
-	/***** sysfs *****/
-	err = create_sysfs_interfaces(s_akm);
-	if (0 > err) {
-		dev_err(&client->dev,
-			"%s: create sysfs failed.", __func__);
-		goto exit6;
-	}
-
-	dev_info(&client->dev, "successfully probed.");
-	return 0;
-
-exit6:
-	misc_deregister(&akm8963_dev);
-exit5:
-	if (s_akm->irq)
-		free_irq(s_akm->irq, s_akm);
-exit4:
-	input_unregister_device(s_akm->input);
-exit3:
-exit2:
-	kfree(s_akm);
-exit1:
-exit0:
-	return err;
-}
-
-static int akm8963_remove(struct i2c_client *client)
-{
-	struct akm8963_data *akm = i2c_get_clientdata(client);
-
-	remove_sysfs_interfaces(akm);
-	if (misc_deregister(&akm8963_dev) < 0)
-		dev_err(&client->dev, "misc deregister failed.");
-	if (akm->irq)
-		free_irq(akm->irq, akm);
-	input_unregister_device(akm->input);
-	kfree(akm);
-	dev_info(&client->dev, "successfully removed.");
-	return 0;
-}
-
-static const struct i2c_device_id akm8963_id[] = {
-	{AKM8963_I2C_NAME, 0 },
-	{ }
-};
-
-static const struct dev_pm_ops akm8963_pm_ops = {
-	.suspend    = akm8963_suspend,
-	.resume     = akm8963_resume,
-};
-
-static struct i2c_driver akm8963_driver = {
-	.probe		= akm8963_probe,
-	.remove 	= akm8963_remove,
-	.id_table	= akm8963_id,
-	.driver = {
-		.name	= AKM8963_I2C_NAME,
-		.pm		= &akm8963_pm_ops,
-	},
-};
-
-static int __init akm8963_init(void)
-{
-	printk(KERN_INFO "AKM8963 compass driver: initialize.");
-	return i2c_add_driver(&akm8963_driver);
-}
-
-static void __exit akm8963_exit(void)
-{
-	printk(KERN_INFO "AKM8963 compass driver: release.");
-	i2c_del_driver(&akm8963_driver);
-}
-
-module_init(akm8963_init);
-module_exit(akm8963_exit);
-
-MODULE_AUTHOR("viral wang <viral_wang@htc.com>");
-MODULE_DESCRIPTION("AKM8963 compass driver");
-MODULE_LICENSE("GPL");
-