MT6571 alps 光感 stk3x1x(光感als+距离传感器ps)

调试 stk3x1x(光感als+距离传感器ps)

配置ProjectConfig.mk中

CUSTOM_KERNEL_ALSPS =stk3x1x

#define C_CUST_I2C_ADDR_NUM 1 // 可以有多个,看设备能接收多少个地址//注意如果这里乱设置数量，可能会引起这个i2c上挂的别的设备挂载失败。
  //比如：这个alps设备只能拉收一个地址，而改成为4个，导致了ft5260(Touchpanel)工作失败。
//从uart 口抓log来看，MTK平台，先初始化accelerometer再，接着alps,接着是TouchPanel....


struct alsps_hw {
    int i2c_num; //这是这个设备挂在主板的哪个i2c接口总线上,MT6571上有i2c0和i2c1 ,一般摄像头是使用i2c0，别的设备都共用i2c1,(挂那么多设备，i2c要有上拉电阻,2.2K左右驱动能力才够)                     /* the i2c bus used by ALS/PS */
    int power_id;                                   /*the VDD power id of the als chip */
    int power_vol;                                  /* the VDD power voltage of the als chip */
	int polling_mode;                               /* 1: polling mode ; 0:interrupt mode*/
	int polling_mode_ps;                               /* 1: polling mode ; 0:interrupt mode*/
	int polling_mode_als;                               /* 1: polling mode ; 0:interrupt mode*/
    unsigned char   i2c_addr[C_CUST_I2C_ADDR_NUM];    /*i2c address list, some chip will have multiple address */
      //这个是设备的i2c地址，可能有多个,有这个设备能接收多个i2c地址，每个地址可能有相应的功能, 光感、距离、....      
    unsigned int    als_level[C_CUST_ALS_LEVEL-1];  /* (C_CUST_ALS_LEVEL-1) levels divides all range into C_CUST_ALS_LEVEL levels*/
    unsigned int    als_value[C_CUST_ALS_LEVEL];    /* the value reported in each level */
    unsigned int    ps_threshold;                   /* the threshold of proximity sensor */
}

增加的文件

alpsmediatekcustomcommonkernelalspsstk3x1xstk3x1x.c    stk3x1x.h

static struct platform_driver stk3x1x_alsps_driver = {
	.probe      = stk3x1x_probe,
	.remove     = stk3x1x_remove,    
	.driver     = {
		.name  = "als_ps",
#if (LINUX_VERSION_CODE<KERNEL_VERSION(3,0,0))	
		.owner = THIS_MODULE,
#endif
	}
};
/*----------------------------------------------------------------------------*/
static int __init stk3x1x_init(void)
{
#if (LINUX_VERSION_CODE>=KERNEL_VERSION(3,0,0))	
	struct alsps_hw *hw = get_cust_alsps_hw();
	APS_LOG("%s: i2c_number=%dn", __func__,hw->i2c_num); 
	i2c_register_board_info(hw->i2c_num, &i2c_stk3x1x, 1);	
#endif
	APS_FUN();
	if(platform_driver_register(&stk3x1x_alsps_driver))
	{
		APS_ERR("failed to register driver");
		return -ENODEV;
	}
	return 0;
}

alpsmediatekcustommt6571v1_phone_emmckernelalspsstk3x1xcust_alsps.c

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