别的地方转来的，自己收藏下：MTK6572 平台G_SENSOR兼容

1. 修改mediatek/config/project_name/projectconfig.mk
CUSTOM_KERNEL_ACCELEROMETER=mma865x_auto afa830_auto
MTK_AUTO_DETECT_ACCELEROMETER=yes
2. 将已经调试OK 的mma865x和afa830文件夹名字重命名为 mma865x_auto afa830_auto
   mediatek/custom/common/kernel/accelerometer/mma865x_auto  
   mediatek/custom/common/kernel/accelerometer/afa830_auto
   mediatek/custom/project_name/kernel/accelerometer/mma865x_auto
   mediatek/custom/project_name/kernel/accelerometer/afa830_auto
3. 修改driver文件mma865x.c  afa830.c  
   mediatek/custom/common/kernel/accelerometer/mma865x_auto/mma865x.c  
   mediatek/custom/common/kernel/accelerometer/afa830_auto/afa830.c
以mma865x为例 ：

(1)打开
    static unsigned short mma865x_force[] = {0x00, MMA865X_I2C_SLAVE_ADDR, I2C_CLIENT_END, I2C_CLIENT_END};
    static const unsigned short *const mma865x_forces[] = { mma865x_force, NULL };
  (2)在代码文件靠前部分声明函数
static int mma865x_local_init(void);
static int mma865x_remove(void);
static int mma865x_init_flag = -1;
  (3)打开已定义或者定义
static struct sensor_init_info mma865x_init_info = {
   .name = "mma865x",
   .init = mma865x_local_init,
   .uninit = mma865x_remove,

};
  (4)修改I2C_driver 数据结构
    将

static struct i2c_driver mma865x_i2c_driver = {
           .driver = {
//        .owner          = THIS_MODULE,
         .name           = MMA865X_DEV_NAME,
     },
  .probe        = mma865x_i2c_probe,
  .remove       = mma865x_i2c_remove,
  .detect    = mma865x_i2c_detect,
#if ！defined(CONFIG_HAS_EARLYSUSPEND)   
     .suspend            = mma865x_suspend,
     .resume             = mma865x_resume,
#endif
  .id_table = mma865x_i2c_id,
// .address_data = &mma865x_addr_data,
};
    修改为

static struct i2c_driver mma865x_i2c_driver = {
     .driver = {
      //   .owner          = THIS_MODULE,
         .name           = MMA865X_DEV_NAME,
     },
  .probe        = mma865x_i2c_probe,
  .remove       = mma865x_i2c_remove,
  .detect    = mma865x_i2c_detect,
#if ！defined(CONFIG_HAS_EARLYSUSPEND)   
     .suspend            = mma865x_suspend,
     .resume             = mma865x_resume,
#endif
  .id_table = mma865x_i2c_id,
  .address_list = (const unsigned short*)mma865x_forces,
};

   (5) 重命名函数
int gsensor_operate(void* self, uint32_t command, void* buff_in, int size_in,
  void* buff_out, int size_out, int* actualout)
    修改为
int mma865x_operate(void* self, uint32_t command, void* buff_in, int size_in,
  void* buff_out, int size_out, int* actualout)

static long mma865x_unlocked_ioctl(struct file *file, unsigned int cmd,
       unsigned long arg)
    修改为
static int mma865x_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
   (6) 修改相应的结构体
static struct file_operations mma865x_fops = {
  .owner = THIS_MODULE,
  .open = mma865x_open,
  .release = mma865x_release,
  .unlocked_ioctl = mma865x_unlocked_ioctl,
  };
    修改为

static struct file_operations mma865x_fops = {
  .owner = THIS_MODULE,
  .open = mma865x_open,
  .release = mma865x_release,
  .compat_ioctl = mma865x_ioctl,
  };

   (7)将文件中所有的
get_cust_acc_hw();
      替换为

mma865x_get_cust_acc_hw();

   (8)将文件中所有的
if(err = mma865x_create_attr(&mma865x_gsensor_driver.driver))
     替换为
if(err = mma865x_create_attr(&mma865x_init_info.platform_diver_addr->driver))

   (9)static int mma865x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
函数中
          sobj.sensor_operate = gsensor_operate;
修改为：
   sobj.sensor_operate = mma865x_operate;  

   (10)打开已定义或者定义

static int mma865x_local_init(void)
{
struct acc_hw *hw = mma865x_get_cust_acc_hw();
GSE_FUN();
MMA865X_power(hw, 1);
mma865x_force[0] = hw->i2c_num;
if(i2c_add_driver(&mma865x_i2c_driver))
{
  GSE_ERR("add driver error\n");
  return -1;
}
if(-1 == mma865x_init_flag)
{
    return -1;
}
}
    static int mma865x_remove(void)
{
     struct acc_hw *hw = mma865x_get_cust_acc_hw();

     GSE_FUN();   
     MMA865X_power(hw, 0);   
     i2c_del_driver(&mma865x_i2c_driver);
     return 0;
}
   (11) 在static int __init mma865x_init(void) 中
使用
hwmsen_gsensor_add(&mma865x_init_info);
替换
if(platform_driver_register(&mma865x_gsensor_driver))
{
  GSE_ERR("failed to register driver");
  return -ENODEV;
}

4. 如下修改   mediatek/custom/project_name/kernel/accelerometer/mma865x_auto/cust_acc.c
#include <linux/types.h>
#include <cust_acc.h>
#include <mach/mt_pm_ldo.h>

/*---------------------------------------------------------------------------*/
int cust_acc_power(struct acc_hw *hw, unsigned int on, char* devname)
{
     if (hw->power_id == MT65XX_POWER_NONE)
         return 0;
     if (on)
         return hwPowerOn(hw->power_id, hw->power_vol, devname);
     else
         return hwPowerDown(hw->power_id, devname);
}

static struct acc_hw mma865x_cust_acc_hw = {
     .i2c_num = 1,
     .direction =1,// 6,
     .power_id = MT65XX_POWER_NONE,  /*！< LDO is not used */
     .power_vol= VOL_DEFAULT,        /*！< LDO is not used */
     .firlen = 16,                   /*！< don't enable low pass fileter */
     .power = cust_acc_power,        
};
/*---------------------------------------------------------------------------*/
struct acc_hw* mma865x_get_cust_acc_hw(void)
{
     return &mma865x_cust_acc_hw;
}

static struct acc_hw AFA830_cust_acc_hw = {
     .i2c_num = 1,
     .direction = 6,
     .power_id = MT65XX_POWER_NONE,  /*！< LDO is not used */
     .power_vol= VOL_DEFAULT,        /*！< LDO is not used */
     .firlen = 16,                   /*！< don't enable low pass fileter */
     .power = cust_acc_power,        
};
/*---------------------------------------------------------------------------*/
struct acc_hw* AFA830_get_cust_acc_hw(void)
{
     return &AFA830_cust_acc_hw;
}

上面的是从http://blog.163.com/lixiaojingok ... 941201351485828379/这个地方转来的，自己收藏备份下，很感谢作者

有机会尝试一下

收藏了。

学习了                  

小编试过没?我试过好像不行，从hwmen里面调不到具体gsensor的probe函数。