Fixed chip ID reporting in FXOS8700 driver

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Fixed chip ID reporting in FXOS8700 driver

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venkatashuressh
Contributor I

Fixed bug in FXOS8700 driver where chip ID would always be reported as

0x0 in an error message when chip id read fails or returns unexpected

value during FXOS87000 initialization.

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jamesbone
NXP TechSupport
NXP TechSupport

Hello Shuressh,

What driver are you talking about? is it about Windows driver? or Linux,  or Android?  What BSP are you using? which board are you using? can you please explain how to reproduced it?


Have a great day,
Jaime

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venkatashuressh
Contributor I

HI Jaime,

Now it is working fine. I am using wand board and android 4.4.2 version.

I am trying to bring up the FXOS8700 sensor..

Now FXOS8700 driver probe is executing successfully.

But it is not generating any events.

Here I am sending the code. Please check the code and tell me any modifications required.

/*


*  mma8451.c - Linux kernel modules for 3-Axis Orientation/Motion


*  Detection Sensor


*


*  Copyright (C) 2010-2011 Freescale Semiconductor, Inc. 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 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.


*


*  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., 675 Mass Ave, Cambridge, MA 02139, USA.


*/



#include <linux/module.h>


#include <linux/init.h>


#include <linux/slab.h>


#include <linux/i2c.h>


#include <linux/pm.h>


#include <linux/mutex.h>


#include <linux/delay.h>


#include <linux/interrupt.h>


#include <linux/irq.h>


#include <linux/hwmon-sysfs.h>


#include <linux/err.h>


#include <linux/hwmon.h>


#include <linux/input-polldev.h>


#include "fxos8700.h"



#define FXOS8700_TYPE_ACC 0x00


#define FXOS8700_TYPE_MAG 0x01



#define FXOS8700_STANDBY 0x00


#define FXOS8700_ACTIVED 0x01



#define ABS_STATUS ABS_WHEEL


struct fxos8700_data_axis{


    short x;


short y;


short z;


};



struct fxos8700_data

{

struct i2c_client * client;


struct input_polled_dev *acc_poll_dev;


struct input_polled_dev *mag_poll_dev;


struct input_dev *cal_input;


struct mutex data_lock;


int acc_active;


int mag_active;


int position;


};


static int fxos8700_position_settings[8][3][3] =


{


   {{ 0, -1,  0}, { 1,  0, 0}, {0, 0, 1}},


   {{-1,  0,  0}, { 0, -1, 0}, {0, 0, 1}},


   {{ 0,  1,  0}, {-1,  0, 0}, {0, 0, 1}},


   {{ 1,  0,  0}, { 0,  1, 0}, {0, 0, 1}},


  


   {{ 0, -1,  0}, {-1,  0, 0}, {0, 0,  -1}},


   {{-1,  0,  0}, { 0,  1, 0}, {0, 0,  -1}},


   {{ 0,  1,  0}, { 1,  0, 0}, {0, 0,  -1}},


   {{ 1,  0,  0}, { 0, -1, 0}, {0, 0,  -1}},


};



static int fxos8700_data_convert(struct fxos8700_data_axis *axis_data,int position)


{


   short rawdata[3],data[3];


   int i,j;


printk("ENTERING INTO %s\n",__func__);


   if(position < 0 || position > 7 )


   position = 0;


   rawdata [0] = axis_data->x;


   rawdata [1] = axis_data->y;


   rawdata [2] = axis_data->z; 


   for(i = 0; i < 3 ; i++)


   {


   data[i] = 0;


   for(j = 0; j < 3; j++)


data[i] += rawdata[j] * fxos8700_position_settings[position][i][j];


   }


   axis_data->x = data[0];


   axis_data->y = data[1];


   axis_data->z = data[2];


   return 0;


}


static int fxos8700_change_mode(struct i2c_client *client, int type,int active)


{


u8 data;


int acc_act,mag_act;


printk("ENTERING INTO %s\n",__func__);


struct fxos8700_data *pdata =  i2c_get_clientdata(client);


acc_act = pdata->acc_active;


mag_act = pdata->mag_active;


data = i2c_smbus_read_byte_data(client, FXOS8700_CTRL_REG1);


data &= ~0x01;


i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1,data); //change to standby



data = i2c_smbus_read_byte_data(client, FXOS8700_M_CTRL_REG1);


data &= ~0x03;     //clear the m_hms bits


if(type == FXOS8700_TYPE_ACC)


acc_act = active;


else


mag_act = active;


if(acc_act == FXOS8700_ACTIVED && mag_act == FXOS8700_ACTIVED)


  data |= 0x03;


else if (acc_act == FXOS8700_STANDBY && mag_act == FXOS8700_ACTIVED)


  data |= 0x01;


else


      data |= 0x00;


i2c_smbus_write_byte_data(client, FXOS8700_M_CTRL_REG1,data);



    data = i2c_smbus_read_byte_data(client, FXOS8700_CTRL_REG1);


if(acc_act ==  FXOS8700_ACTIVED || mag_act == FXOS8700_ACTIVED)    


data |= 0x01;


else


data &= ~0x01;


i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1,data);


return 0;



}


static int fxos8700_device_init(struct i2c_client *client)


{


int result;


printk("ENTERING INTO %s\n",__func__);


struct fxos8700_data *pdata =  i2c_get_clientdata(client);


pdata->acc_active = FXOS8700_STANDBY;


pdata->mag_active = FXOS8700_STANDBY;


result = i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x00); //standby mode


if (result < 0)


goto out;


result = i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x60); //0dr 50hz


if (result < 0)


goto out;


result = i2c_smbus_write_byte_data(client, FXOS8700_M_CTRL_REG1,0x02); //hybrid mode


if (result < 0)


goto out;


    pdata->position = 3;


return 0;


out:


dev_err(&client->dev, "error when init fxos8700 device:(%d)", result);


return result;


}



static int fxos8700_device_stop(struct i2c_client *client)


{


printk("ENTERING INTO %s\n",__func__);


i2c_smbus_write_byte_data(client, FXOS8700_CTRL_REG1, 0x00);


return 0;


}



static int fxos8700_read_data(struct i2c_client *client,struct fxos8700_data_axis *data, int type)


{


u8 tmp_data[FXOS8700_DATA_BUF_SIZE];


int ret;


u8 reg;


printk("ENTERING INTO %s\n",__func__);


if(type == FXOS8700_TYPE_ACC)


reg = FXOS8700_OUT_X_MSB;


else


reg = FXOS8700_M_OUT_X_MSB;



ret = i2c_smbus_read_i2c_block_data(client, reg, FXOS8700_DATA_BUF_SIZE, tmp_data);


if (ret < FXOS8700_DATA_BUF_SIZE) {


dev_err(&client->dev, "i2c block read %s failed\n", (type == FXOS8700_TYPE_ACC ? "acc" : "mag"));


return -EIO;


}


data->x = ((tmp_data[0] << 8) & 0xff00) | tmp_data[1];


data->y = ((tmp_data[2] << 8) & 0xff00) | tmp_data[3];


data->z = ((tmp_data[4] << 8) & 0xff00) | tmp_data[5];


if(type == FXOS8700_TYPE_MAG)


{


      data->x *= -1;


  data->y *= -1;


  data->z *= -1;


}


return 0;


}



 


static int fxos8700_report_data(struct input_dev *idev, struct fxos8700_data_axis *data)


{


printk("ENTERING INTO %s\n",__func__);


if(idev != NULL){


input_report_abs(idev, ABS_X, data->x);


input_report_abs(idev, ABS_Y, data->y);


input_report_abs(idev, ABS_Z, data->z);


input_sync(idev);


}


return 0;


}



static void fxos8700_acc_dev_poll(struct input_polled_dev *dev)


{


printk("ENTERING INTO %s\n",__func__);


    struct fxos8700_data *pdata = (struct fxos8700_data *)dev->private;


struct i2c_client *client = pdata->client;


struct fxos8700_data_axis data;


printk("ENTERING INTO %s -->position=%d\n",__func__,pdata->position);


printk("ENTERING INTO %s -->acc_Active=0x%x\n",__func__,pdata->acc_active);


mutex_lock(&pdata->data_lock);


if(pdata->acc_active ==  FXOS8700_ACTIVED){


printk("ENTERING INTO IF LOOP FOR ACC\n");


    fxos8700_read_data(client,&data,FXOS8700_TYPE_ACC);


fxos8700_data_convert(&data,pdata->position);


fxos8700_report_data(dev->input,&data);


if(dev->poll_interval == POLL_STOP_TIME)


dev->poll_interval = POLL_INTERVAL;


}


else


dev->poll_interval = POLL_STOP_TIME;  //longer the interval


mutex_unlock(&pdata->data_lock);


}



static void fxos8700_mag_dev_poll(struct input_polled_dev *dev)


{


printk("ENTERING INTO %s\n",__func__);


    struct fxos8700_data *pdata = (struct fxos8700_data *)dev->private;


struct i2c_client *client = pdata->client;


struct fxos8700_data_axis data;


printk("ENTERING INTO %s -->position=%d\n",__func__,pdata->position);


printk("ENTERING INTO %s -->mag_Active=0x%x\n",__func__,pdata->mag_active);


mutex_lock(&pdata->data_lock);


if(pdata->mag_active ==  FXOS8700_ACTIVED){


printk("ENTERING INTO IF LOOP FOR MAG\n");


    fxos8700_read_data(client,&data,FXOS8700_TYPE_MAG);


fxos8700_data_convert(&data,pdata->position);


fxos8700_report_data(dev->input,&data);


if(dev->poll_interval == POLL_STOP_TIME)


dev->poll_interval = POLL_INTERVAL;


}


else


dev->poll_interval = POLL_STOP_TIME;  // if standby ,set as 10s to slow the poll,


mutex_unlock(&pdata->data_lock);


}



static int fxos8700_register_poll_device(struct fxos8700_data *pdata)


{


printk("ENTERING INTO %s\n",__func__);


    struct input_dev *idev = NULL;


struct input_polled_dev * poll_idev = NULL;


struct i2c_client *client = pdata->client;


int err = -1;


/*register poll deivce for g-sensor*/


poll_idev = input_allocate_polled_device();


    if(!poll_idev)


  goto out;


    idev = poll_idev->input;


poll_idev->private = pdata;


    poll_idev->poll = fxos8700_acc_dev_poll;


poll_idev->poll_interval = POLL_STOP_TIME;


poll_idev->poll_interval_min = POLL_INTERVAL_MIN;


poll_idev->poll_interval_max = POLL_INTERVAL_MAX;


idev = poll_idev->input;


idev->name = "FreescaleAccelerometer";


idev->uniq = "Freescale fxos8700";


idev->id.bustype = BUS_I2C;


idev->evbit[0] = BIT_MASK(EV_ABS);


input_set_abs_params(idev, ABS_X,  -0x7fff, 0x7fff, 0, 0);


input_set_abs_params(idev, ABS_Y,  -0x7fff, 0x7fff, 0, 0);


input_set_abs_params(idev, ABS_Z,  -0x7fff, 0x7fff, 0, 0);


pdata->acc_poll_dev = poll_idev;


    err = input_register_polled_device(pdata->acc_poll_dev);


if (err) {


dev_err(&client->dev, "register poll device failed!\n");


goto err_register_acc;


}


/*register poll deivce for m-sensor*/


poll_idev = input_allocate_polled_device();


    if(!poll_idev)


  goto err_alloc_mag;


    idev = poll_idev->input;


poll_idev->private = pdata;


    poll_idev->poll = fxos8700_mag_dev_poll;


poll_idev->poll_interval = POLL_INTERVAL;


poll_idev->poll_interval_min = POLL_INTERVAL_MIN;


poll_idev->poll_interval_max = POLL_INTERVAL_MAX;


idev = poll_idev->input;


idev->name = "FreescaleMagnetometer";


idev->uniq = "Freescale fxos8700";


idev->id.bustype = BUS_I2C;


idev->evbit[0] = BIT_MASK(EV_ABS);


input_set_abs_params(idev, ABS_X,  -0x7fff, 0x7fff, 0, 0);


input_set_abs_params(idev, ABS_Y,  -0x7fff, 0x7fff, 0, 0);


input_set_abs_params(idev, ABS_Z,  -0x7fff, 0x7fff, 0, 0);


pdata->mag_poll_dev = poll_idev;


err = input_register_polled_device(pdata->mag_poll_dev);


if (err) {


dev_err(&client->dev, "register poll device failed!\n");


goto err_register_mag;


}


return 0;


err_register_mag:


  input_free_polled_device(pdata->mag_poll_dev);


err_alloc_mag:


  input_unregister_polled_device(pdata->acc_poll_dev);


err_register_acc:


  input_free_polled_device(pdata->acc_poll_dev);


out:


  pdata->acc_poll_dev = NULL;


pdata->mag_poll_dev = NULL;


  return err;


}


static int fxos8700_unregister_poll_device(struct fxos8700_data *pdata)


{


printk("ENTERING INTO %s\n",__func__);


   if(pdata->acc_poll_dev){


     input_unregister_polled_device(pdata->acc_poll_dev);


  input_free_polled_device(pdata->acc_poll_dev);


   }


    if(pdata->mag_poll_dev){


     input_unregister_polled_device(pdata->mag_poll_dev);


  input_free_polled_device(pdata->mag_poll_dev);


   }


   return 0;


}



static int fxos8700_reigister_caldata_input(struct fxos8700_data * pdata)


{


struct input_dev *idev;


printk("ENTERING INTO %s\n",__func__);


struct i2c_client * client = pdata->client;


int ret;


idev = input_allocate_device();


if(!idev){


dev_err(&client->dev,"alloc calibrated data device error\n");


return -EINVAL;


}


idev->name = "eCompass";


idev->id.bustype = BUS_I2C;


idev->evbit[0] = BIT_MASK(EV_ABS);


input_set_abs_params(idev, ABS_X, -15000, 15000, 0, 0);


input_set_abs_params(idev, ABS_Y, -15000, 15000, 0, 0);


input_set_abs_params(idev, ABS_Z, -15000, 15000, 0, 0);


input_set_abs_params(idev, ABS_RX,    0, 36000, 0, 0);


input_set_abs_params(idev, ABS_RY,-18000, 18000, 0, 0);


input_set_abs_params(idev, ABS_RZ, -9000,  9000, 0, 0);


input_set_abs_params(idev, ABS_STATUS, 0,     3, 0, 0);


ret = input_register_device(idev);


if(ret){


dev_err(&client->dev, "register poll device failed!\n");


return -EINVAL;


}


pdata->cal_input = idev;


return 0;


}


static int fxos8700_unreigister_caldata_input(struct fxos8700_data * pdata)


{


printk("ENTERING INTO %s\n",__func__);


    struct input_dev *idev = pdata->cal_input;


if(idev){


  input_unregister_device(idev);


  input_free_device(idev);


}


pdata->cal_input = NULL;


return 0;


}



static ssize_t fxos8700_enable_show(struct device *dev,


   struct device_attribute *attr, char *buf)


{


printk("ENTERING INTO %s\n",__func__);


struct input_polled_dev *poll_dev = dev_get_drvdata(dev);


struct fxos8700_data *pdata = (struct fxos8700_data *)(poll_dev->private);


struct i2c_client *client = pdata->client;


u8 val,mode;


    int enable;


mutex_lock(&pdata->data_lock);


val = i2c_smbus_read_byte_data(client, FXOS8700_CTRL_REG1);


mode = i2c_smbus_read_byte_data(client, FXOS8700_M_CTRL_REG1);


enable = 0;


if(pdata->acc_poll_dev == poll_dev){


if((val &0x01) && ((mode &0x03) == 0x00 || (mode &0x03) == 0x03))


enable = FXOS8700_ACTIVED;


else


enable = FXOS8700_STANDBY;


}


if(pdata->mag_poll_dev == poll_dev){


if((val &0x01) && ((mode &0x03) == 0x01 || (mode &0x03) == 0x03))


enable = FXOS8700_ACTIVED;


else


enable = FXOS8700_STANDBY;


}


mutex_unlock(&pdata->data_lock);


return sprintf(buf, "%d\n", enable);


}



 


static ssize_t fxos8700_enable_store(struct device *dev,


    struct device_attribute *attr,


    const char *buf, size_t count)


{


printk("ENTERING INTO %s\n",__func__);


struct input_polled_dev *poll_dev = dev_get_drvdata(dev);


struct fxos8700_data *pdata = (struct fxos8700_data *)(poll_dev->private);


struct i2c_client *client = pdata->client;


int type;


int enable;


int ret;


enable = simple_strtoul(buf, NULL, 10);  


mutex_lock(&pdata->data_lock);


if(poll_dev == pdata->acc_poll_dev)


type = FXOS8700_TYPE_ACC;


if(poll_dev == pdata->mag_poll_dev)


type = FXOS8700_TYPE_MAG;


enable = (enable > 0 ? FXOS8700_ACTIVED : FXOS8700_STANDBY);


ret = fxos8700_change_mode(client,type,enable);


if(!ret){


if(type == FXOS8700_TYPE_ACC)


pdata->acc_active = enable;


else


pdata->mag_active = enable;


}


mutex_unlock(&pdata->data_lock);


return count;


}


static ssize_t fxos8700_position_show(struct device *dev,


   struct device_attribute *attr, char *buf)


{


    struct input_polled_dev *poll_dev = dev_get_drvdata(dev);


struct fxos8700_data *pdata = (struct fxos8700_data *)(poll_dev->private);


    int position = 0;


mutex_lock(&pdata->data_lock);


    position = pdata->position ;


mutex_unlock(&pdata->data_lock);


return sprintf(buf, "%d\n", position);


}



static ssize_t fxos8700_position_store(struct device *dev,


    struct device_attribute *attr,


    const char *buf, size_t count)


{


int  position;


printk("ENTERING INTO %s\n",__func__);


struct input_polled_dev *poll_dev = dev_get_drvdata(dev);


struct fxos8700_data *pdata = (struct fxos8700_data *)(poll_dev->private);


position = simple_strtoul(buf, NULL, 10);   


mutex_lock(&pdata->data_lock);


    pdata->position = position;


mutex_unlock(&pdata->data_lock);


return count;


}



static DEVICE_ATTR(enable, S_IWUSR | S_IRUGO,


   fxos8700_enable_show, fxos8700_enable_store);


static DEVICE_ATTR(position, S_IWUSR | S_IRUGO,


   fxos8700_position_show, fxos8700_position_store);



static struct attribute *fxos8700_attributes[] = {


&dev_attr_enable.attr,


&dev_attr_position.attr,


NULL


};



static const struct attribute_group fxos8700_attr_group = {


.attrs = fxos8700_attributes,


};



static int fxos8700_register_sysfs_device(struct fxos8700_data *pdata)


{


printk("ENTERING INTO %s\n",__func__);


    struct input_dev *idev = NULL;


struct input_polled_dev * poll_idev = NULL;


struct i2c_client * client = pdata->client;


int err = -1;


/*register sysfs for acc*/


poll_idev = pdata->acc_poll_dev;


idev = poll_idev->input;


    err = sysfs_create_group(&idev->dev.kobj, &fxos8700_attr_group);


if (err) {


dev_err(&client->dev, "register poll device failed!\n");


goto out;


}



/*register sysfs for mag*/


poll_idev = pdata->mag_poll_dev;


idev = poll_idev->input;


    err = sysfs_create_group(&idev->dev.kobj, &fxos8700_attr_group);


if (err) {


dev_err(&client->dev, "register poll device failed!\n");


goto err_register_sysfs;


}


return 0;


err_register_sysfs:


   poll_idev = pdata->acc_poll_dev;


   idev = poll_idev->input;


   sysfs_remove_group(&idev->dev.kobj,&fxos8700_attr_group);  /*remove accel senosr sysfs*/


out:


return err;


}


static int fxos8700_unregister_sysfs_device(struct fxos8700_data *pdata)


{


printk("ENTERING INTO %s\n",__func__);


    struct input_dev *idev = NULL;


struct input_polled_dev * poll_idev = NULL;


    poll_idev = pdata->acc_poll_dev;


    idev = poll_idev->input;


    sysfs_remove_group(&idev->dev.kobj,&fxos8700_attr_group);  /*remove accel senosr sysfs*/



    poll_idev = pdata->mag_poll_dev;


  idev = poll_idev->input;


  sysfs_remove_group(&idev->dev.kobj,&fxos8700_attr_group);  /*remove accel senosr sysfs*/


  return 0;


}



static int __devinit fxos8700_probe(struct i2c_client *client,


   const struct i2c_device_id *id)


{


int result, client_id;


struct fxos8700_data * pdata;


struct i2c_adapter *adapter;


printk("ENTERING INTO %s\n",__func__);



adapter = to_i2c_adapter(client->dev.parent);


result = i2c_check_functionality(adapter,


I2C_FUNC_SMBUS_BYTE |


I2C_FUNC_SMBUS_BYTE_DATA);


if (!result)


goto err_out;



 


   


// client->addr = 0x1e;



 


client_id = i2c_smbus_read_byte_data(client, FXOS8700_WHO_AM_I);


if ((client_id &0x00FF)!=  FXOS8700_DEVICE_ID ) {


dev_err(&client->dev,


"read chip ID 0x%x is not equal to 0x%x \n",


(client_id &0x00ff), FXOS8700_DEVICE_ID);


result = -EINVAL;


goto err_out;


}


    pdata = kzalloc(sizeof(struct fxos8700_data), GFP_KERNEL);


if(!pdata){


result = -ENOMEM;


dev_err(&client->dev, "alloc data memory error!\n");


goto err_out;


    }


pdata->client = client;


mutex_init(&pdata->data_lock);


i2c_set_clientdata(client,pdata);


    result = fxos8700_register_poll_device(pdata);


if (result) {


dev_err(&client->dev, "create device file failed!\n");


result = -EINVAL;


goto err_register_poll_device;


}


    result = fxos8700_register_sysfs_device(pdata);


if (result) {


dev_err(&client->dev, "create device file failed!\n");


result = -EINVAL;


goto err_register_sys;


}


result = fxos8700_reigister_caldata_input(pdata);


if (result) {


dev_err(&client->dev, "create calibrated device file failed!\n");


result = -EINVAL;


goto err_register_caldev;


}


fxos8700_device_init(client);


printk("%s succ\n",__FUNCTION__);


return 0;


err_register_caldev:


fxos8700_unregister_sysfs_device(pdata);


err_register_sys:


fxos8700_unregister_poll_device(pdata);


err_register_poll_device:


i2c_set_clientdata(client,NULL);


kfree(pdata);


err_out:


return result;


}



static int __devexit fxos8700_remove(struct i2c_client *client)


{


printk("ENTERING INTO %s\n",__func__);


struct fxos8700_data *pdata =  i2c_get_clientdata(client);


if(!pdata)


return 0;


    fxos8700_device_stop(client);


fxos8700_unreigister_caldata_input(pdata);


fxos8700_unregister_sysfs_device(pdata);


fxos8700_unregister_poll_device(pdata);


    kfree(pdata);


return 0;


}



#ifdef CONFIG_PM_SLEEP


static int fxos8700_suspend(struct device *dev)


{


printk("ENTERING INTO %s\n",__func__);


struct i2c_client *client = to_i2c_client(dev);


struct fxos8700_data *pdata =  i2c_get_clientdata(client);


mutex_lock(&pdata->data_lock);


if(pdata->acc_active || pdata->mag_active)


fxos8700_device_stop(client);


mutex_unlock(&pdata->data_lock);


return 0;


}



static int fxos8700_resume(struct device *dev)


{


printk("ENTERING INTO %s\n",__func__);


    int ret = 0;


struct i2c_client *client = to_i2c_client(dev);


struct fxos8700_data *pdata =  i2c_get_clientdata(client);


mutex_lock(&pdata->data_lock);


if(pdata->acc_active)


fxos8700_change_mode(client,FXOS8700_TYPE_ACC,FXOS8700_ACTIVED);


if(pdata->mag_active)


fxos8700_change_mode(client,FXOS8700_TYPE_MAG,FXOS8700_ACTIVED);


mutex_unlock(&pdata->data_lock);


return ret;


 


}


#endif



static const struct i2c_device_id fxos8700_id[] = {


{"fxos8700", 0},


{ }


};


MODULE_DEVICE_TABLE(i2c, fxos8700_id);



static SIMPLE_DEV_PM_OPS(fxos8700_pm_ops, fxos8700_suspend, fxos8700_resume);


static struct i2c_driver fxos8700_driver = {


.driver = {


   .name = "fxos8700",


   .owner = THIS_MODULE,


   .pm = &fxos8700_pm_ops,


   },


.probe = fxos8700_probe,


.remove = __devexit_p(fxos8700_remove),


.id_table = fxos8700_id,


};



static int __init fxos8700_init(void)


{


printk("ENTERING INTO %s\n",__func__);


/* register driver */


int res;


res = i2c_add_driver(&fxos8700_driver);


if (res < 0) {


printk(KERN_INFO "add fxos8700 i2c driver failed\n");


return -ENODEV;


}


return res;


}



static void __exit fxos8700_exit(void)


{


printk("ENTERING INTO %s\n",__func__);


i2c_del_driver(&fxos8700_driver);


}



MODULE_AUTHOR("Freescale Semiconductor, Inc.");


MODULE_DESCRIPTION("MMA845X 3-Axis Orientation/Motion Detection Sensor driver");


MODULE_LICENSE("GPL");



module_init(fxos8700_init);


module_exit(fxos8700_exit);


Regards,

Shuressh

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econote_vikrant
Contributor II

Hey, Greetings!
May I know, how did you solve the issue?

As I am facing the same issue

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