[移动开发]20220314在MT6739的android8.1下打开gpio节点

20220314在MT6739的android8.1下打开gpio节点
2022/3/14 10:16

1、完整编译MT6739的android8.1的SDK：
rootroot@rootroot-desktop:~$?
rootroot@rootroot-desktop:~$ cd mt6739_android8.1/
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ ll
total 304
drwxrwxr-x ?36 rootroot rootroot ? 4096 ?3月 21 15:51 ./
drwxr-xr-x ?22 rootroot rootroot ? 4096 ?3月 22 10:17 ../
lrwxrwxrwx ? 1 rootroot rootroot ? ? 19 ?3月 ?7 ?2018 Android.bp -> build/soong/root.bp*
drwxrwxr-x ?22 rootroot rootroot ? 4096 ?3月 ?7 ?2018 art/
drwxrwxr-x ?11 rootroot rootroot ? 4096 ?3月 ?7 ?2018 bionic/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 bootable/
lrwxrwxrwx ? 1 rootroot rootroot ? ? 26 ?3月 ?7 ?2018 bootstrap.bash -> build/soong/bootstrap.bash*
drwxr-xr-x ? 6 rootroot rootroot ? 4096 ?3月 ?9 18:15 build/
drwxrwxr-x ? 8 rootroot rootroot ? 4096 ?3月 ?7 ?2018 ccu_tool/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 compatibility/
drwxrwxr-x ?11 rootroot rootroot ? 4096 ?3月 ?7 ?2018 cts/
drwxrwxr-x ? 9 rootroot rootroot ? 4096 ?3月 ?7 ?2018 dalvik/
drwxrwxr-x ? 5 rootroot rootroot ? 4096 ?3月 ?7 ?2018 developers/
drwxrwxr-x ?20 rootroot rootroot ? 4096 ?3月 ?7 ?2018 development/
drwxr-xr-x ?12 rootroot rootroot ? 4096 ?3月 ?9 15:45 device/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 docs/
drwxrwxr-x 267 rootroot rootroot ?12288 ?3月 ?7 ?2018 external/
drwxr-xr-x ?18 rootroot rootroot ? 4096 ?3月 ?9 15:45 frameworks/
drwxrwxr-x ?13 rootroot rootroot ? 4096 ?3月 ?7 ?2018 hardware/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 kernel/
drwxrwxr-x ?24 rootroot rootroot ? 4096 ?3月 ?7 ?2018 kernel-3.18/
drwxr-xr-x ?25 rootroot rootroot ? 4096 ?3月 ?9 15:46 kernel-4.4/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 kernel_modules-4.4/
drwxrwxr-x ?18 rootroot rootroot ? 4096 ?3月 ?7 ?2018 libcore/
drwxrwxr-x ? 7 rootroot rootroot ? 4096 ?3月 ?7 ?2018 libnativehelper/
-rw-rw-r-- ? 1 rootroot rootroot ? ? 87 ?3月 ?7 ?2018 Makefile
-rwxr--r-- ? 1 rootroot rootroot 150841 ?3月 10 10:10 mt6739_8p1_启动+新LCD+VT-tty1_20220310_1010.tar.gz*
drwxrwxr-x ? 7 rootroot rootroot ? 4096 ?3月 21 18:58 out/
drwxrwxr-x ? 9 rootroot rootroot ? 4096 ?3月 ?7 ?2018 packages/
drwxrwxr-x ? 2 rootroot rootroot ? 4096 ?3月 23 ?2018 PatchLog/
drwxrwxr-x ? 5 rootroot rootroot ? 4096 ?3月 ?7 ?2018 pdk/
drwxrwxr-x ? 8 rootroot rootroot ? 4096 ?3月 ?7 ?2018 platform_testing/
drwxrwxr-x ?22 rootroot rootroot ? 4096 ?3月 ?7 ?2018 prebuilts/
drwxrwxr-x ?24 rootroot rootroot ? 4096 ?3月 ?7 ?2018 sdk/
drwxrwxr-x ?28 rootroot rootroot ? 4096 ?3月 ?7 ?2018 system/
drwxrwxr-x ? 4 rootroot rootroot ? 4096 ?3月 ?7 ?2018 test/
drwxrwxr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 ?2018 toolchain/
drwxrwxr-x ? 8 rootroot rootroot ? 4096 ?3月 ?7 ?2018 tools/
drwxrwxr-x ? 8 rootroot rootroot ? 4096 ?3月 ?7 ?2018 trusty/
drwxr-xr-x ? 3 rootroot rootroot ? 4096 ?3月 ?7 14:30 vendor/
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ source build/envsetup.sh?
including device/asus/fugu/vendorsetup.sh
including device/generic/car/vendorsetup.sh
including device/generic/mini-emulator-arm64/vendorsetup.sh
including device/generic/mini-emulator-armv7-a-neon/vendorsetup.sh
including device/generic/mini-emulator-mips64/vendorsetup.sh
including device/generic/mini-emulator-mips/vendorsetup.sh
including device/generic/mini-emulator-x86_64/vendorsetup.sh
including device/generic/mini-emulator-x86/vendorsetup.sh
including device/generic/uml/vendorsetup.sh
including device/google/dragon/vendorsetup.sh
including device/google/marlin/vendorsetup.sh
including device/google/muskie/vendorsetup.sh
including device/google/taimen/vendorsetup.sh
including device/huawei/angler/vendorsetup.sh
including device/lge/bullhead/vendorsetup.sh
including device/linaro/hikey/vendorsetup.sh
including device/mediatek/build/vendorsetup.sh
including device/mediateksample/k39tv1_64_bsp/vendorsetup.sh
including device/mediateksample/k39tv1_bsp_1g/vendorsetup.sh
including device/mediateksample/k39tv1_bsp_512/vendorsetup.sh
including device/mediateksample/k39tv1_bsp/vendorsetup.sh
including sdk/bash_completion/adb.bash
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ lunch

You're building on Linux

Lunch menu... pick a combo:
? ? ?1. aosp_arm-eng
? ? ?2. aosp_arm64-eng
? ? ?3. aosp_mips-eng
? ? ?4. aosp_mips64-eng
? ? ?5. aosp_x86-eng
? ? ?6. aosp_x86_64-eng
? ? ?7. full_fugu-userdebug
? ? ?8. aosp_fugu-userdebug
? ? ?9. aosp_car_emu_arm-userdebug
? ? ?10. aosp_car_emu_arm64-userdebug
? ? ?11. aosp_car_emu_x86-userdebug
? ? ?12. aosp_car_emu_x86_64-userdebug
? ? ?13. mini_emulator_arm64-userdebug
? ? ?14. m_e_arm-userdebug
? ? ?15. m_e_mips64-eng
? ? ?16. m_e_mips-userdebug
? ? ?17. mini_emulator_x86_64-userdebug
? ? ?18. mini_emulator_x86-userdebug
? ? ?19. uml-userdebug
? ? ?20. aosp_dragon-userdebug
? ? ?21. aosp_dragon-eng
? ? ?22. aosp_marlin-userdebug
? ? ?23. aosp_marlin_svelte-userdebug
? ? ?24. aosp_sailfish-userdebug
? ? ?25. aosp_walleye-userdebug
? ? ?26. aosp_walleye_test-userdebug
? ? ?27. aosp_taimen-userdebug
? ? ?28. aosp_angler-userdebug
? ? ?29. aosp_bullhead-userdebug
? ? ?30. aosp_bullhead_svelte-userdebug
? ? ?31. hikey-userdebug
? ? ?32. hikey960-userdebug
? ? ?33. full_k39tv1_64_bsp-eng
? ? ?34. full_k39tv1_64_bsp-user
? ? ?35. full_k39tv1_64_bsp-userdebug
? ? ?36. full_k39tv1_bsp_1g-eng
? ? ?37. full_k39tv1_bsp_1g-user
? ? ?38. full_k39tv1_bsp_1g-userdebug
? ? ?39. full_k39tv1_bsp_512-eng
? ? ?40. full_k39tv1_bsp_512-user
? ? ?41. full_k39tv1_bsp_512-userdebug
? ? ?42. full_k39tv1_bsp-eng
? ? ?43. full_k39tv1_bsp-user
? ? ?44. full_k39tv1_bsp-userdebug

Which would you like? [aosp_arm-eng] 36

============================================
PLATFORM_VERSION_CODENAME=REL
PLATFORM_VERSION=8.1.0
TARGET_PRODUCT=full_k39tv1_bsp_1g
TARGET_BUILD_VARIANT=eng
TARGET_BUILD_TYPE=release
TARGET_PLATFORM_VERSION=OPM1
TARGET_BUILD_APPS=
TARGET_ARCH=arm
TARGET_ARCH_VARIANT=armv7-a-neon
TARGET_CPU_VARIANT=cortex-a53
TARGET_2ND_ARCH=
TARGET_2ND_ARCH_VARIANT=
TARGET_2ND_CPU_VARIANT=cortex-a53
HOST_ARCH=x86_64
HOST_2ND_ARCH=x86
HOST_OS=linux
HOST_OS_EXTRA=Linux-4.4.0-142-generic-x86_64-with-Ubuntu-14.04-trusty
HOST_CROSS_OS=windows
HOST_CROSS_ARCH=x86
HOST_CROSS_2ND_ARCH=x86_64
HOST_BUILD_TYPE=release
BUILD_ID=O11019
OUT_DIR=out
AUX_OS_VARIANT_LIST=
============================================
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ make -j16

2、查找.config（内核配置文件）内核配置文件
rootroot@rootroot-desktop:~/mt6739_android8.1$ find . -name .config
./external/toybox/.config
./out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ/.config
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ cd ./out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ/
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$ ll
total 1069164
drwxrwxr-x 22 rootroot rootroot ? ? ?4096 ?3月 21 18:59 ./
drwxrwxr-x 23 rootroot rootroot ? ? ?4096 ?3月 21 17:14 ../
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 15:54 arch/
-rw-rw-r-- ?1 rootroot rootroot ? ?115467 ?3月 21 18:56 bak10.conifig
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 15:56 block/
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:55 certs/
-rw-rw-r-- ?1 rootroot rootroot ? ?115445 ?3月 21 18:57 .config
-rw-rw-r-- ?1 rootroot rootroot ? ?115467 ?3月 21 15:54 .config.old
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:56 crypto/
drwxrwxr-x 56 rootroot rootroot ? ? ?4096 ?3月 21 18:59 drivers/
drwxrwxr-x 36 rootroot rootroot ? ? ?4096 ?3月 21 16:04 firmware/
drwxrwxr-x 23 rootroot rootroot ? ? ?4096 ?3月 21 15:58 fs/
drwxrwxr-x ?4 rootroot rootroot ? ? ?4096 ?3月 21 15:55 include/
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 18:59 init/
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:55 ipc/
drwxrwxr-x 14 rootroot rootroot ? ? ?4096 ?3月 21 18:59 kernel/
drwxrwxr-x 10 rootroot rootroot ? ? 12288 ?3月 21 16:02 lib/
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 646 ?3月 21 18:59 Makefile
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 715 ?3月 21 18:59 .missing-syscalls.d
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:57 mm/
-rw-rw-r-- ?1 rootroot rootroot ? ? 18439 ?3月 21 18:59 modules.builtin
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ? 0 ?3月 21 18:59 modules.order
-rw-rw-r-- ?1 rootroot rootroot ? ?473427 ?3月 21 18:59 Module.symvers
drwxrwxr-x 18 rootroot rootroot ? ? ?4096 ?3月 21 16:02 net/
drwxrwxr-x ?8 rootroot rootroot ? ? ?4096 ?3月 21 15:55 scripts/
drwxrwxr-x ?5 rootroot rootroot ? ? ?4096 ?3月 21 15:56 security/
drwxrwxr-x 22 rootroot rootroot ? ? ?4096 ?3月 21 18:59 sound/
lrwxrwxrwx ?1 rootroot rootroot ? ? ? ?43 ?3月 21 18:59 source -> /home/rootroot/mt6739_android8.1/kernel-4.4/
-rw-rw-r-- ?1 rootroot rootroot ? 5203992 ?3月 21 18:59 System.map
-rw-rw-r-- ?1 rootroot rootroot ? 3729684 ?3月 21 18:59 .tmp_kallsyms1.o
-rw-rw-r-- ?1 rootroot rootroot ? 3729684 ?3月 21 18:59 .tmp_kallsyms2.o
-rw-rw-r-- ?1 rootroot rootroot ? 5203992 ?3月 21 18:59 .tmp_System.map
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:55 .tmp_versions/
-rwxrwxr-x ?1 rootroot rootroot 216834308 ?3月 21 18:59 .tmp_vmlinux1*
-rwxrwxr-x ?1 rootroot rootroot 219259396 ?3月 21 18:59 .tmp_vmlinux2*
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 15:55 usr/
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ? 2 ?3月 21 18:59 .version
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 16:02 virt/
-rwxrwxr-x ?1 rootroot rootroot 219259396 ?3月 21 18:59 vmlinux*
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 235 ?3月 21 18:59 .vmlinux.cmd
-rw-rw-r-- ?1 rootroot rootroot 421234364 ?3月 21 18:59 vmlinux.o
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$ cp .config bak11.config
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?

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3、配置gpio这个设备节点：
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$ make ARCH=arm menuconfig
? GEN ? ? ./Makefile
scripts/kconfig/mconf ?Kconfig
warning: (MACH_MT6771 && PINCTRL_MT6739 && PINCTRL_MT6775) selects MTK_EINT_MULTI_TRIGGER_DESIGN which has unmet direct dependencies (PINCTRL && PINCTRL_MTK)

*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.

#### build completed successfully (01:38 (mm:ss)) ####

rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g/obj/KERNEL_OBJ$?

Device Drivers ?--->
?? ?-*- GPIO Support ?--->

?? ??? ?--- GPIO Support
?? ??? ?[ ] ? Debug GPIO calls
?? ??? ?[ ] ? /sys/class/gpio/... (sysfs interface)

?? ??? ?修改为：

?? ??? ?--- GPIO Support
?? ??? ?[*] ? Debug GPIO calls
?? ??? ?[*] ? /sys/class/gpio/... (sysfs interface)

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4、编译内核：
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ make bootimage
rootroot@rootroot-desktop:~/mt6739_android8.1$?
rootroot@rootroot-desktop:~/mt6739_android8.1$ cd out/target/product/k39tv1_bsp_1g/
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$ ll
total 1004224
drwxrwxr-x 14 rootroot rootroot ? ? ?4096 ?3月 21 18:59 ./
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 15:51 ../
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ?20 ?3月 21 15:54 android-info.txt
-rw-rw-r-- ?1 rootroot rootroot ? ?543736 ?3月 21 15:53 appsboot.mbn
-rw-rw-r-- ?1 rootroot rootroot ? ?543696 ?3月 21 15:53 appsboot.raw
-rwxrw-r-- ?1 rootroot rootroot ?10078208 ?3月 21 17:12 boot10.img*
-rw-rw-r-- ?1 rootroot rootroot ?10078208 ?3月 21 18:55 boot15.img
-rw-rw-r-- ?1 rootroot rootroot ?10080256 ?3月 21 18:59 boot.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ?76 ?3月 21 18:58 build_fingerprint.txt
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 16:53 cache/
-rw-r--r-- ?1 rootroot rootroot ? 6086804 ?3月 21 16:53 cache.img
-rw-rw-r-- ?1 rootroot rootroot ? ? 96698 ?3月 21 15:51 clean_steps.mk
drwxrwxr-x ?7 rootroot rootroot ? ? ?4096 ?3月 21 17:09 data/
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 16:09 dex_bootjars/
drwxrwxr-x ?2 rootroot rootroot ? ? ?4096 ?3月 21 17:12 fake_packages/
drwxrwxr-x ?6 rootroot rootroot ? ? ?4096 ?3月 21 16:14 gen/
-rw-rw-r-- ?1 rootroot rootroot ? ?279128 ?3月 21 17:14 installed-files.json
-rw-rw-r-- ?1 rootroot rootroot ? ? 85182 ?3月 21 17:14 installed-files.txt
-rw-rw-r-- ?1 rootroot rootroot ? ?137466 ?3月 21 17:14 installed-files-vendor.json
-rw-rw-r-- ?1 rootroot rootroot ? ? 43017 ?3月 21 17:14 installed-files-vendor.txt
-rw-rw-r-- ?1 rootroot rootroot ? 9035186 ?3月 21 18:59 kernel
-rw-rw-r-- ?1 rootroot rootroot ? ?543696 ?3月 21 15:53 lk.img
-rw-rw-r-- ?1 rootroot rootroot ? ? 45168 ?3月 21 15:53 loader_ext.img
-rw-rw-r-- ?1 rootroot rootroot ? 1267376 ?3月 21 15:53 logo.bin
-rw-rw-r-- ?1 rootroot rootroot ? ? ?3440 ?3月 21 15:54 mcupmfw.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 528 ?3月 21 15:54 md1arm7.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 528 ?3月 21 15:54 md1dsp.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 528 ?3月 21 15:54 md1img.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 528 ?3月 21 15:54 md3img.img
-rw-rw-r-- ?1 rootroot rootroot ? 2535989 ?3月 21 15:53 module-info.json
-rw-rw-r-- ?1 rootroot rootroot ? ? 14988 ?3月 21 15:52 MT6739_Android_scatter.txt
drwxrwxr-x 23 rootroot rootroot ? ? ?4096 ?3月 21 17:14 obj/
-rw-rw-r-- ?1 rootroot rootroot ? ? 31776 ?3月 21 16:04 odmdtbo.img
-rw-rw-r-- ?1 rootroot rootroot ? ? ? 624 ?3月 21 15:52 ota_scatter.txt
-rw-rw-r-- ?1 rootroot rootroot ? ? 16896 ?3月 21 15:52 PGPT
-rw-rw-r-- ?1 rootroot rootroot ? ?117480 ?3月 21 15:53 preloader.bin
-rw-rw-r-- ?1 rootroot rootroot ? ?119528 ?3月 21 15:53 preloader.img
-rw-rw-r-- ?1 rootroot rootroot ? ?117480 ?3月 21 15:53 preloader_k39tv1_bsp_1g.bin
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ?48 ?3月 21 15:52 previous_build_config.mk
-rw-rw-r-- ?1 rootroot rootroot ? 1041509 ?3月 21 18:59 ramdisk.img
-rw-rw-r-- ?1 rootroot rootroot ? 5419173 ?3月 21 17:12 ramdisk-recovery.img
drwxrwxr-x ?3 rootroot rootroot ? ? ?4096 ?3月 21 15:54 recovery/
-rw-rw-r-- ?1 rootroot rootroot ? ? ? ?67 ?3月 21 17:12 recovery.id
-rw-rw-r-- ?1 rootroot rootroot ?14456832 ?3月 21 17:12 recovery.img
drwxrwxr-x 17 rootroot rootroot ? ? ?4096 ?3月 21 17:12 root/
-rw-rw-r-- ?1 rootroot rootroot ? ?135168 ?3月 21 15:52 secro.img
-rw-rw-r-- ?1 rootroot rootroot ? ? 24752 ?3月 21 15:54 spmfw.img
drwxrwxr-x ?8 rootroot rootroot ? ? ?4096 ?3月 21 17:08 symbols/
drwxrwxr-x 15 rootroot rootroot ? ? ?4096 ?3月 21 17:14 system/
-rw-r--r-- ?1 rootroot rootroot 733369444 ?3月 21 17:14 system.img
-rw-rw-r-- ?1 rootroot rootroot ? ?108032 ?3月 21 16:00 tee.img
drwxrwxr-x ?4 rootroot rootroot ? ? ?4096 ?3月 21 16:00 trustzone/
-rw-r--r-- ?1 rootroot rootroot ? ? 57624 ?3月 21 17:13 userdata.img
drwxrwxr-x 16 rootroot rootroot ? ? ?4096 ?3月 21 16:54 vendor/
-rw-r--r-- ?1 rootroot rootroot 221644092 ?3月 21 17:14 vendor.img
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$ diff boot.img boot10.img?
Binary files boot.img and boot10.img differ
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?
rootroot@rootroot-desktop:~/mt6739_android8.1/out/target/product/k39tv1_bsp_1g$?

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5、刷机之后可以看到在这里配置GPIO端口无效！：

k39tv1_bsp_1g:/ #?
k39tv1_bsp_1g:/ #?
k39tv1_bsp_1g:/ # ??
k39tv1_bsp_1g:/ #?
k39tv1_bsp_1g:/ # ls -l
total 1208
dr-xr-xr-x ? 3 root ? root ? ? ? ? 0 2022-03-22 10:13 acct
lrwxrwxrwx ? 1 root ? root ? ? ? ?50 1970-01-01 08:00 bugreports -> /data/user_de/0/com.android.shell/files/bugreports
drwxrwx--- ? 6 system cache ? ? 4096 2022-03-22 10:14 cache
lrwxrwxrwx ? 1 root ? root ? ? ? ?13 1970-01-01 08:00 charger -> /sbin/charger
drwxr-xr-x ? 4 root ? root ? ? ? ? 0 1970-01-01 08:00 config
drwxr-xr-x ? 2 root ? root ? ? ? ? 0 2022-03-22 10:14 custom
lrwxrwxrwx ? 1 root ? root ? ? ? ?17 1970-01-01 08:00 d -> /sys/kernel/debug
drwxrwx--x ?55 system system ? ?4096 2022-03-22 10:14 data
lrwxrwxrwx ? 1 root ? root ? ? ? ?23 1970-01-01 08:00 default.prop -> system/etc/prop.default
drwxr-xr-x ?18 root ? root ? ? ?3660 2022-03-22 10:14 dev
lrwxrwxrwx ? 1 root ? root ? ? ? ?11 1970-01-01 08:00 etc -> /system/etc
-rw-r----- ? 1 root ? root ? ? ? ?61 1970-01-01 08:00 fstab.enableswap
-rwxr-x--- ? 1 root ? root ? 1140080 1970-01-01 08:00 init
-rwxr-x--- ? 1 root ? root ? ? ?1344 1970-01-01 08:00 init.environ.rc
-rwxr-x--- ? 1 root ? root ? ? ? ?62 1970-01-01 08:00 init.preload.rc
-rwxr-x--- ? 1 root ? root ? ? 28403 1970-01-01 08:00 init.rc
-rwxr-x--- ? 1 root ? root ? ? ?7874 1970-01-01 08:00 init.usb.configfs.rc
-rwxr-x--- ? 1 root ? root ? ? ?5721 1970-01-01 08:00 init.usb.rc
-rwxr-x--- ? 1 root ? root ? ? ? 497 1970-01-01 08:00 init.zygote32.rc
drwxr-xr-x ? 3 root ? root ? ? ? ? 0 1970-01-01 08:00 lib
drwxr-xr-x ?11 root ? system ? ? 240 2022-03-22 10:14 mnt
drwxr-xr-x ? 2 root ? root ? ? ? ? 0 1970-01-01 08:00 oem
dr-xr-xr-x 347 root ? root ? ? ? ? 0 1970-01-01 08:00 proc
drwx------ ? 2 root ? root ? ? ? ? 0 2022-03-10 11:07 root
drwxr-x--- ? 2 root ? root ? ? ? ? 0 1970-01-01 08:00 sbin
lrwxrwxrwx ? 1 root ? root ? ? ? ?21 1970-01-01 08:00 sdcard -> /storage/self/primary
drwxr-xr-x ? 3 root ? root ? ? ? ?80 2022-03-22 10:14 storage
dr-xr-xr-x ?15 root ? root ? ? ? ? 0 2022-03-22 10:13 sys
drwxr-xr-x ?16 root ? root ? ? ?4096 1970-01-01 08:00 system
-rw-r--r-- ? 1 root ? root ? ? ?5222 1970-01-01 08:00 ueventd.rc
drwxr-xr-x ?17 root ? root ? ? ?4096 1970-01-01 08:00 vendor
k39tv1_bsp_1g:/ #?
k39tv1_bsp_1g:/ # cd /sys/
k39tv1_bsp_1g:/sys #?
k39tv1_bsp_1g:/sys # ls -l
total 0
drwxr-xr-x ? 2 root root 0 2022-03-22 10:13 block
drwxr-xr-x ? 2 root root 0 2022-03-22 10:13 bootinfo
drwxr-xr-x ?20 root root 0 2022-03-22 10:13 bus
drwxr-xr-x ?73 root root 0 2022-03-22 10:13 class
drwxr-xr-x ? 4 root root 0 2022-03-22 10:13 dev
drwxr-xr-x ? 9 root root 0 2022-03-22 10:13 devices
drwxr-xr-x ? 3 root root 0 2022-03-22 10:13 firmware
drwxr-xr-x ? 8 root root 0 2022-03-22 10:13 fs
drwxr-xr-x ?10 root root 0 2022-03-22 10:13 kernel
drwxr-xr-x 128 root root 0 2022-03-22 10:13 module
drwxr-xr-x ? 2 root root 0 2022-03-22 10:13 mtk_rgu
drwxr-xr-x ? 2 root root 0 2022-03-22 10:13 mtuart
drwxr-xr-x ? 5 root root 0 2022-03-22 10:13 power
k39tv1_bsp_1g:/sys #?
k39tv1_bsp_1g:/sys # cd class/ ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
k39tv1_bsp_1g:/sys/class #?
k39tv1_bsp_1g:/sys/class # ls -l
total 0
drwxr-xr-x 2 root root 0 2022-03-22 10:13 BOOT
drwxr-xr-x 2 root root 0 2022-03-22 10:13 CAM_CALdrv1
drwxr-xr-x 2 root root 0 2022-03-22 10:13 MTK_SMI
drwxr-xr-x 2 root root 0 2022-03-22 10:13 MT_pmic_adc_cali
drwxr-xr-x 2 root root 0 2022-03-22 10:13 Vcodec
drwxr-xr-x 2 root root 0 2022-03-22 10:13 accdet
drwxr-xr-x 2 root root 0 2022-03-22 10:13 actuatordrv_main_af
drwxr-xr-x 2 root root 0 2022-03-22 10:13 android_usb
drwxr-xr-x 2 root root 0 2022-03-22 10:13 bdi
drwxr-xr-x 2 root root 0 2022-03-22 10:13 block
drwxr-xr-x 2 root root 0 2022-03-22 10:13 btif
drwxr-xr-x 2 root root 0 2022-03-22 10:13 ccci_md_sta
drwxr-xr-x 2 root root 0 2022-03-22 10:13 ccci_node
drwxr-xr-x 2 root root 0 2022-03-22 10:13 charger_ftm
drwxr-xr-x 2 root root 0 2022-03-22 10:13 devmap
drwxr-xr-x 2 root root 0 2022-03-22 10:13 drm
drwxr-xr-x 2 root root 0 2022-03-22 10:13 firmware
drwxr-xr-x 2 root root 0 2022-03-22 10:13 flashlight_core
drwxr-xr-x 2 root root 0 2022-03-22 10:14 fm
drwxr-xr-x 2 root root 0 2022-03-22 10:13 gauge
drwxr-xr-x 2 root root 0 2022-03-22 10:13 gpio
drwxr-xr-x 2 root root 0 2022-03-22 10:13 graphics
drwxr-xr-x 2 root root 0 2022-03-22 10:14 hidg
drwxr-xr-x 2 root root 0 2022-03-22 10:13 hidraw
drwxr-xr-x 2 root root 0 2022-03-22 10:13 i2c-adapter
drwxr-xr-x 2 root root 0 2022-03-22 10:13 ieee80211
drwxr-xr-x 2 root root 0 2022-03-22 10:13 input
drwxr-xr-x 2 root root 0 2022-03-22 10:13 ispdrv
drwxr-xr-x 2 root root 0 2022-03-22 10:13 leds
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mem
drwxr-xr-x 2 root root 0 2022-03-22 10:13 misc
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mmc_host
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mtk-adc-cali
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mtk_cmdq
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mtk_dfrc
drwxr-xr-x 2 root root 0 2022-03-22 10:13 mtk_disp_mgr
drwxr-xr-x 2 root root 0 2022-03-22 10:13 net
drwxr-xr-x 2 root root 0 2022-03-22 10:13 pmic_ftm
drwxr-xr-x 2 root root 0 2022-03-22 10:13 pmsg
drwxr-xr-x 2 root root 0 2022-03-22 10:13 power_supply
drwxr-xr-x 2 root root 0 2022-03-22 10:13 ppp
drwxr-xr-x 2 root root 0 2022-03-22 10:13 regulator
drwxr-xr-x 2 root root 0 2022-03-22 10:13 rpmb
drwxr-xr-x 2 root root 0 2022-03-22 10:13 rpmb_dummy
drwxr-xr-x 2 root root 0 2022-03-22 10:13 rtc
drwxr-xr-x 2 root root 0 2022-03-22 10:13 scheddrv
drwxr-xr-x 2 root root 0 2022-03-22 10:13 scsi_device
drwxr-xr-x 2 root root 0 2022-03-22 10:13 scsi_disk
drwxr-xr-x 2 root root 0 2022-03-22 10:13 scsi_host
drwxr-xr-x 2 root root 0 2022-03-22 10:13 sec
drwxr-xr-x 2 root root 0 2022-03-22 10:13 sensor
drwxr-xr-x 2 root root 0 2022-03-22 10:13 sensordrv
drwxr-xr-x 2 root root 0 2022-03-22 10:13 sound
drwxr-xr-x 2 root root 0 2022-03-22 10:13 spi_master
drwxr-xr-x 2 root root 0 2022-03-22 10:14 stpbt
drwxr-xr-x 2 root root 0 2022-03-22 10:14 stpgps
drwxr-xr-x 2 root root 0 2022-03-22 10:14 stpwmt
drwxr-xr-x 2 root root 0 2022-03-22 10:13 switch
drwxr-xr-x 2 root root 0 2022-03-22 10:13 switching_charger
drwxr-xr-x 2 root root 0 2022-03-22 10:13 thermal
drwxr-xr-x 2 root root 0 2022-03-22 10:13 timed_output
drwxr-xr-x 2 root root 0 2022-03-22 10:13 tty
drwxr-xr-x 2 root root 0 2022-03-22 10:13 udc
drwxr-xr-x 2 root root 0 2022-03-22 10:13 usb_boost
drwxr-xr-x 2 root root 0 2022-03-22 10:13 usb_rawbulk
drwxr-xr-x 2 root root 0 2022-03-22 10:13 vc
drwxr-xr-x 2 root root 0 2022-03-22 10:13 vtconsole
drwxr-xr-x 2 root root 0 2022-03-22 10:14 wmtWifi
drwxr-xr-x 2 root root 0 2022-03-22 10:14 wmtdetect
drwxr-xr-x 2 root root 0 2022-03-22 10:13 xt_idletimer
drwxr-xr-x 2 root root 0 2022-03-22 10:13 zram-control
k39tv1_bsp_1g:/sys/class #?
k39tv1_bsp_1g:/sys/class #?
k39tv1_bsp_1g:/sys/class # cd gpio/ ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio # ls -l
total 0
--w------- 1 root root 4096 2022-03-22 10:16 export
lrwxrwxrwx 1 root root ? ?0 2022-03-22 10:16 gpiochip343 -> ../../devices/platform/1000b000.pinctrl/gpio/gpiochip343
--w------- 1 root root 4096 2022-03-22 10:16 unexport
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio # echo 12 > export
1|k39tv1_bsp_1g:/sys/class/gpio #?
1|k39tv1_bsp_1g:/sys/class/gpio # ls -l
total 0
--w------- 1 root root 4096 2022-03-22 10:18 export
lrwxrwxrwx 1 root root ? ?0 2022-03-22 10:16 gpiochip343 -> ../../devices/platform/1000b000.pinctrl/gpio/gpiochip343
--w------- 1 root root 4096 2022-03-22 10:16 unexport
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
k39tv1_bsp_1g:/sys/class/gpio #?
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参考资料：
https://linus.blog.csdn.net/article/details/105760139
LinuxGPIO操作和MTK平台GPIO

缘起：
需要配置OTG，但是GPIO端口号不知道，于是尝试通过配置/sys/class/gpio/失败。
初步判断需要配置：/sys/devices/platform/1000b000.pinctrl/mt_gpio

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