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MMC3680KJ指南针调试MTK6737 Android 7.0调试

MMC3680KJ指南针调试MTK6737 Android 7.0调试

原理图

官方提供的说明文档

代码调试流程及代码片段

步骤	工作内容
1	dws/dtsi配置
2	makefile编写(android、内核)
3	移植内核驱动代码
4	移植hal运行daemo
5	加入init.rc
6	配置selinux
7	编译
8	查看生成结果

dws/dtsi配置

dws配置

dtsi配置

cust_mag@30 {
  compatible = "mediatek,mmc3680x";
  i2c_num = <2>;
  i2c_addr = <0x30 0 0 0>;
  direction = <4>;
  power_id  = <0xffff>;
  power_vol = <0>;
  is_batch_supported  = <0>;
};

makefile编写(android、内核)

android makefile

CUSTOM_HAL_MSENSORLIB = memsicd3680x
MTK_AUTO_DETECT_MAGNETOMETER=no
CUSTOM_KERNEL_MAGNETOMETER=mmc3680x

device/mediatek/mt6797/device.mk

 PRODUCT_PACKAGES += memsicd3416x
+PRODUCT_PACKAGES += memsicd3680x
 PRODUCT_PACKAGES += s62xd smartsensor

kernel makefile

内核主Makefile

CONFIG_MTK_HWMON=y
CONFIG_MTK_AUTO_DETECT_MAGNETOMETER=
CONFIG_CUSTOM_KERNEL_MAGNETOMETER=y
CONFIG_MTK_MMC3680X=y

MSENSOR驱动总控制makefile

ifeq ($(CONFIG_MTK_MMC3680X),y)
obj-y   +=  mmc3680x/
endif

MSENSOR驱动总控制Kconfig

source "drivers/misc/mediatek/magnetometer/mmc3680x/Kconfig"

移植内核驱动代码

移植hal运行daemo

vendor\vanzo\libs\memsicd3680x\Android.mk

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE = memsicd3680x
LOCAL_MODULE_CLASS = EXECUTABLES
LOCAL_MODULE_OWNER = mtk
LOCAL_PROPRIETARY_MODULE = true
LOCAL_SHARED_LIBRARIES = libc++
LOCAL_MULTILIB = 64
LOCAL_SRC_FILES_64 = arm64/memsicd3680x
LOCAL_MODULE_TAGS = optional
include $(BUILD_PREBUILT)

include $(CLEAR_VARS)
LOCAL_MODULE = memsicd3680x
LOCAL_MODULE_CLASS = EXECUTABLES
LOCAL_MODULE_OWNER = mtk
LOCAL_PROPRIETARY_MODULE = true
LOCAL_SHARED_LIBRARIES = libc++
LOCAL_MULTILIB = 32
LOCAL_SRC_FILES_32 = arm/memsicd3680x
LOCAL_MODULE_TAGS = optional
include $(BUILD_PREBUILT)

vendor\vanzo\libs

vendor\vanzo\libs\memsicd3680x\Android.mk
vendor\vanzo\libs\memsicd3680x\arm\
vendor\vanzo\libs\memsicd3680x\arm64

加入init.rc

device/mediatek/mt6735/init.mt6735.rc

+service memsicd3680x /system/bin/memsicd3680x
+    disabled
+    user system
+    group system
+

配置selinux

te问题，baise、full、bsp都添加一遍
mediatek/common/sepolicy/bsp/memsicd3416x.te

mediatek/common/sepolicy/msensord.te

allow msensord ctl_akmd09912_prop:property_service set;
+allow msensord ctl_memsicd3680x_prop:property_service set;
allow msensord ctl_bmm050d_prop:property_service set;

mediatek/common/sepolicy/property.te

type ctl_akmd09912_prop, property_type;
+type ctl_memsicd3680x_prop, property_type;
type ctl_bmm050d_prop, property_type;

mediatek/common/sepolicy/property_contexts

ctl.akmd09912     u:object_r:ctl_akmd09912_prop:s0
+ctl.memsicd3680x     u:object_r:ctl_memsicd3680x_prop:s0
ctl.geomagneticd     u:object_r:ctl_geomagneticd_prop:s0

mediatek/common/sepolicy/shell.te

allow shell memsicd3416x_exec:file rx_file_perms;
+allow shell memsicd3680x_exec:file rx_file_perms;
allow shell mobile_log_d_exec:file rx_file_perms;

代码移植包差分包

MMC3680KJ带提交查分包.zip

小结

uart log提示如下，adb shell查找memsicd3680x在/vendor/bin/memsicd3680x，修改init.rc

cannot find '/system/bin/memsicd3680x' (No such file or directory), disabling 'memsicd3680x'

uart log提示如下, 根据系统其他ok的传感器添加对应的selinux支持
```
Service memsicd3680x does not have a SELinux domain defined.
```

daemo里面报的错误 memsicd3680x异常退出, 使用了32位的Daemon，系统是64位的，所以换成64位的Daemon

[   35.499151] <0>.(0)[500:memsicd3680x][name:mmc3680x&]<<-MMC3680X ERROR->> [line=1464]mmc3680x_compat_ioctl not supported = 0x40028324

解决方式如下截图描述:

bug01

修改方式如下: 删除32位的Daemon，只留下64位Daemon，Android.mk如下

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE = memsicd3680x
LOCAL_MODULE_CLASS = EXECUTABLES
LOCAL_MODULE_OWNER = mtk
LOCAL_PROPRIETARY_MODULE = true
LOCAL_SHARED_LIBRARIES = libc++
LOCAL_MULTILIB = 64
LOCAL_SRC_FILES_64 = arm64/memsicd3680x
include $(BUILD_PREBUILT)

#include $(CLEAR_VARS)
#LOCAL_MODULE = memsicd3680x
#LOCAL_MODULE_CLASS = EXECUTABLES
#LOCAL_MODULE_OWNER = mtk
#LOCAL_PROPRIETARY_MODULE = true
#LOCAL_SHARED_LIBRARIES = libc++
#LOCAL_MULTILIB = 32
#LOCAL_SRC_FILES_32 = arm/memsicd3680x
#include $(BUILD_PREBUILT)