MT8788 android 9.0 sensor驱动移植

不懂就问

1.硬件配置

打开核心板原理图，配置GYRO(陀螺仪)，ALSPS(光感)，G-sensor(加速度)的ENIT和GPIO以及I2C，打开

vendor\mediatek\proprietary\scripts\dct\DrvGen.exe 工具选择

(1)vendor\mediatek\proprietary\bootable\bootloader\lk\target\tb8788p1_64_bsp\dct\dct\codegen.dws

(2)kernel-4.4\drivers\misc\mediatek\dws\mt6771\tb8788p1_64_bsp.dws

配置操作如图所示：

如果不知道I2C挂在哪个总线上，地址是多少，可以参考一下操作

路径: kernel-4.4\arch\arm64\boot\dts\mediatek\tb8788p1_64_bsp.dts(搜索sensor)

2.sensor 驱动移植

2.1 添加光感驱动文件(ap3xx6c)

将ap3xx6c驱动文件夹添加到alsps(光感)目录中

kernel-4.4\drivers\misc\mediatek\sensors-1.0\alsps\ap3xx6c

2.2 修改配置文件

(1)路径:device/mediateksample/tb8788p1_64_bsp/ProjectConfig.mk

1. CUSTOM_KERNEL_GYROSCOPE = yes

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(2)路径:kernel-4.4/arch/arm64/configs/tb8788p1_64_bsp_defconfig，添加以下代码，有的话就不用添加，添加没有的就行

1. CONFIG_MTK_SENSORS_1_0=y
   
2. CONFIG_CUSTOM_KERNEL_ACCELEROMETER=y
   
3. #CONFIG_MTK_MC3410_I2C is not set
   
4. CONFIG_CUSTOM_KERNEL_ALSPS=y
   
5. CONFIG_MTK_LTR303=y
   
6. #CONFIG_MTK_LTR303 is not set
   
7. CONFIG_MTK_AP3XX6C=y
   
8. CONFIG_CUSTOM_KERNEL_MAGNETOMETER=y
   
9. CONFIG_MTK_AKM09918=y
   
10. CONFIG_CUSTOM_KERNEL_GYROSCOPE=y
    
11. CONFIG_MTK_MPU6050GY=y
    
12. CONFIG_MTK_MPU6050G=y

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(3)路径:kernel-4.4/drivers/misc/mediatek/sensors-1.0/alsps/Kconfig

1. source "drivers/misc/mediatek/sensors-1.0/alsps/ap3xx6c/Kconfig"

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(4)路径:kernel-4.4/drivers/misc/mediatek/sensors-1.0/alsps/Makefile

1. obj-$(CONFIG_MTK_AP3XX6C)      +=  ap3xx6c/

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