20220315在MT6739的android10下打开gpio节点
2022/3/15 11:38
1、完整编译MT6739的android10：
time(./oneCmdMake 9186TOF_S5080BS_SKY_MV88_QGO eng)
2、在kernel中打开gpio选项：
rootroot@rootroot-System-Product1:~/n82$
rootroot@rootroot-System-Product1:~/n82$ find . -name .config
./external/toybox/.config
./out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ/.config
rootroot@rootroot-System-Product1:~/n82$
rootroot@rootroot-System-Product1:~/n82$ cd ./out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ/
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$ ll
total 1176400
drwxrwxr-x 22 rootroot rootroot 4096 3月 21 17:51 ./
drwxrwxr-x 20 rootroot rootroot 4096 3月 21 16:16 ../
drwxrwxr-x 3 rootroot rootroot 4096 3月 21 15:14 arch/
-rw-rw-r-- 1 rootroot rootroot 139089 3月 21 17:42 bak11.config
-rw-rw-r-- 1 rootroot rootroot 139067 3月 21 17:44 bak21.config
drwxrwxr-x 3 rootroot rootroot 4096 3月 21 15:15 block/
-rw-rw-r-- 1 rootroot rootroot 1467016 3月 21 17:50 built-in.o
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 15:14 certs/
-rw-rw-r-- 1 rootroot rootroot 139067 3月 21 17:48 .config
-rw-rw-r-- 1 rootroot rootroot 139089 3月 21 15:14 .config.old
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 15:18 crypto/
drwxrwxr-x 62 rootroot rootroot 4096 3月 21 17:50 drivers/
-rw-rw-r-- 1 rootroot rootroot 100 3月 21 15:14 dtbimg.cfg
-rw-rw-r-- 1 rootroot rootroot 119 3月 21 15:14 dtboimg.cfg
-rw-rw-r-- 1 rootroot rootroot 16 3月 21 17:51 end.txt
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 15:15 firmware/
drwxrwxr-x 25 rootroot rootroot 4096 3月 21 15:21 fs/
drwxrwxr-x 4 rootroot rootroot 4096 3月 21 15:14 include/
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 17:50 init/
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 15:14 ipc/
drwxrwxr-x 15 rootroot rootroot 4096 3月 21 17:50 kernel/
drwxrwxr-x 8 rootroot rootroot 12288 3月 21 15:17 lib/
-rw-rw-r-- 1 rootroot rootroot 621 3月 21 17:50 Makefile
-rw-rw-r-- 1 rootroot rootroot 903 3月 21 17:50 .missing-syscalls.d
drwxrwxr-x 2 rootroot rootroot 12288 3月 21 15:15 mm/
-rw-rw-r-- 1 rootroot rootroot 25642 3月 21 17:50 modules.builtin
-rw-rw-r-- 1 rootroot rootroot 105 3月 21 17:51 modules.order
-rw-rw-r-- 1 rootroot rootroot 553475 3月 21 17:51 Module.symvers
drwxrwxr-x 20 rootroot rootroot 4096 3月 21 15:21 net/
-rw-rw-r-- 1 rootroot rootroot 7544298 3月 21 17:51 nm_output.txt
drwxrwxr-x 8 rootroot rootroot 4096 3月 21 15:14 scripts/
drwxrwxr-x 5 rootroot rootroot 4096 3月 21 15:15 security/
drwxrwxr-x 22 rootroot rootroot 4096 3月 21 17:50 sound/
lrwxrwxrwx 1 rootroot rootroot 30 3月 21 17:50 source -> /home/rootroot/n82/kernel-4.14/
-rw-rw-r-- 1 rootroot rootroot 18 3月 21 17:51 stext.txt
-rw-rw-r-- 1 rootroot rootroot 5305880 3月 21 17:51 System.map
-rw-rw-r-- 1 rootroot rootroot 2515688 3月 21 17:51 .tmp_kallsyms1.o
-rw-rw-r-- 1 rootroot rootroot 14858012 3月 21 17:51 .tmp_kallsyms1.S
-rw-rw-r-- 1 rootroot rootroot 2515688 3月 21 17:51 .tmp_kallsyms2.o
-rw-rw-r-- 1 rootroot rootroot 14858012 3月 21 17:51 .tmp_kallsyms2.S
-rw-rw-r-- 1 rootroot rootroot 5305880 3月 21 17:51 .tmp_System.map
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 17:50 .tmp_versions/
-rwxrwxr-x 1 rootroot rootroot 235238588 3月 21 17:51 .tmp_vmlinux1*
-rwxrwxr-x 1 rootroot rootroot 237794788 3月 21 17:51 .tmp_vmlinux2*
drwxrwxr-x 2 rootroot rootroot 4096 3月 21 15:14 usr/
-rw-rw-r-- 1 rootroot rootroot 2 3月 21 17:50 .version
drwxrwxr-x 3 rootroot rootroot 4096 3月 21 15:17 virt/
-rwxrwxr-x 1 rootroot rootroot 237794788 3月 21 17:51 vmlinux*
-rw-rw-r-- 1 rootroot rootroot 240 3月 21 17:51 .vmlinux.cmd
-rw-rw-r-- 1 rootroot rootroot 438875964 3月 21 17:50 vmlinux.o
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$ cp .config bak21.config^C
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$ make ARCH=arm menuconfig
HOSTCC scripts/basic/fixdep
HOSTCC scripts/basic/bin2c
GEN ./Makefile
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/mconf
scripts/kconfig/mconf Kconfig
'rivers/misc/mediatek/sensors-1.0/accelerometer/KXTJ2_1009/Kconfig:1:warning: ignoring unsupported character '
'rivers/misc/mediatek/sensors-1.0/accelerometer/KXTJ2_1009/Kconfig:2:warning: ignoring unsupported character '
'rivers/misc/mediatek/sensors-1.0/accelerometer/KXTJ2_1009/Kconfig:3:warning: ignoring unsupported character '
'rivers/misc/mediatek/sensors-1.0/accelerometer/KXTJ2_1009/Kconfig:4:warning: ignoring unsupported character '
'rivers/input/fingerprint/chipsailing_ree/Kconfig:1:warning: ignoring unsupported character '
'rivers/input/fingerprint/chipsailing_ree/Kconfig:2:warning: ignoring unsupported character '
'rivers/input/fingerprint/chipsailing_ree/Kconfig:3:warning: ignoring unsupported character '
'rivers/input/fingerprint/chipsailing_ree/Kconfig:4:warning: ignoring unsupported character '
drivers/virtio/Kconfig:1:warning: ignoring type redefinition of 'VIRTIO' from 'boolean' to 'tristate'
configuration written to .config
*** End of the configuration.
*** Execute 'make' to start the build or try 'make help'.
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_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)
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$ diff .config bak11.config
2516,2517c2516,2517
< CONFIG_DEBUG_GPIO=y
< CONFIG_GPIO_SYSFS=y
---
> # CONFIG_DEBUG_GPIO is not set
> # CONFIG_GPIO_SYSFS is not set
rootroot@rootroot-System-Product1:~/n82/out/target/product/bird_k39tv1_bsp_1g/obj/KERNEL_OBJ$
3、重新编译内核：
./moduleMake eng bootimage
./moduleMake eng lk
4、确认gpio这个节点：
console:/ #
console:/ # ls -l
total 140
dr-xr-xr-x 24 root root 0 2022-03-03 00:30 acct
drwxr-xr-x 14 root root 280 2022-03-03 00:31 apex
lrw-r--r-- 1 root root 11 2022-03-21 08:16 bin -> /system/bin
lrw-r--r-- 1 root root 50 2022-03-21 08:16 bugreports -> /data/user_de/0/com.android.shell/files/bugreports
drwxrwx--- 6 system cache 4096 2022-03-03 00:31 cache
lrw-r--r-- 1 root root 19 2022-03-21 08:16 charger -> /system/bin/charger
drwxr-xr-x 4 root root 0 1970-01-01 00:00 config
lrw-r--r-- 1 root root 17 2022-03-21 08:16 d -> /sys/kernel/debug
drwxrwx--x 53 system system 4096 2022-03-03 00:31 data
drwxr-xr-x 2 root root 4096 2022-03-21 07:14 debug_ramdisk
lrw------- 1 root root 23 2022-03-21 08:16 default.prop -> system/etc/prop.default
drwxr-xr-x 21 root root 4300 2022-03-03 00:31 dev
lrw-r--r-- 1 root root 11 2022-03-21 08:16 etc -> /system/etc
lrwxr-x--- 1 root shell 16 2022-03-21 08:16 init -> /system/bin/init
-rwxr-x--- 1 root shell 2255 2022-03-21 07:14 init.environ.rc
-rwxr-x--- 1 root shell 62 2022-03-21 08:09 init.preload.rc
-rwxr-x--- 1 root shell 33397 2022-03-21 08:11 init.rc
-rwxr-x--- 1 root shell 7690 2022-03-21 07:52 init.usb.configfs.rc
-rwxr-x--- 1 root shell 5649 2022-03-21 07:52 init.usb.rc
-rwxr-x--- 1 root shell 563 2022-03-21 07:52 init.zygote32.rc
drwx------ 2 root root 16384 2022-03-21 08:16 lost+found
drwxr-xr-x 7 root root 4096 2022-03-03 00:31 metadata
drwxr-xr-x 13 root system 280 2022-03-03 00:30 mnt
drwxr-xr-x 2 root root 4096 2022-03-21 07:14 odm
drwxr-xr-x 2 root root 4096 2022-03-21 07:14 oem
dr-xr-xr-x 389 root root 0 1970-01-01 00:00 proc
drwxr-xr-x 8 root root 4096 2022-03-21 08:15 product
lrw-r--r-- 1 root root 24 2022-03-21 08:16 product_services -> /system/product_services
drwxr-x--- 2 root shell 4096 2022-03-21 07:14 sbin
lrw-r--r-- 1 root root 21 2022-03-21 08:16 sdcard -> /storage/self/primary
drwxr-xr-x 3 root root 80 2022-03-03 00:31 storage
dr-xr-xr-x 16 root root 0 2022-03-03 00:30 sys
drwxr-xr-x 13 root root 4096 2022-03-21 08:16 system
-rw-r--r-- 1 root root 2880 2022-03-21 07:14 ueventd.rc
drwxr-xr-x 12 root root 4096 2022-03-21 08:14 vendor
-rw-r--r-- 1 root root 524 2022-03-21 08:11 verity_key
console:/ #
console:/ #
console:/ # cd /sys/
console:/sys #
console:/sys # ls -l
total 0
drwxr-xr-x 2 root root 0 2022-03-21 08:17 block
drwxr-xr-x 2 root root 0 2022-03-21 08:17 board_properties
drwxr-xr-x 2 root root 0 2022-03-21 08:17 bootinfo
drwxr-xr-x 24 root root 0 2022-03-21 08:17 bus
drwxr-xr-x 73 root root 0 2022-03-21 08:16 class
drwxr-xr-x 4 root root 0 2022-03-21 08:17 dev
drwxr-xr-x 9 root root 0 2022-03-03 00:30 devices
drwxr-xr-x 3 root root 0 2022-03-21 08:17 firmware
drwxr-xr-x 9 root root 0 2022-03-03 00:30 fs
drwxr-xr-x 11 root root 0 2022-03-03 00:30 kernel
drwxr-xr-x 134 root root 0 2022-03-21 08:17 module
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mtk_rgu
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mtuart
drwxr-xr-x 5 root root 0 2022-03-03 00:30 power
console:/sys #
console:/sys #
console:/sys # cd class/
console:/sys/class #
console:/sys/class # ls -l
total 0
drwxr-xr-x 2 root root 0 2022-03-21 08:17 BOOT
drwxr-xr-x 2 root root 0 2022-03-21 08:17 CAM_CALdrv1
drwxr-xr-x 2 root root 0 2022-03-21 08:17 Charging\ Adapter
drwxr-xr-x 2 root root 0 2022-03-21 08:17 MTK_SMI
drwxr-xr-x 2 root root 0 2022-03-21 08:17 MT_pmic_adc_cali
drwxr-xr-x 2 root root 0 2022-03-21 08:17 Vcodec
drwxr-xr-x 2 root root 0 2022-03-21 08:17 accdet
drwxr-xr-x 2 root root 0 2022-03-21 08:17 actuatordrv_main_af
drwxr-xr-x 2 root root 0 2022-03-21 08:17 android_usb
drwxr-xr-x 2 root root 0 2022-03-21 08:17 bdi
drwxr-xr-x 2 root root 0 2022-03-21 08:17 block
drwxr-xr-x 2 root root 0 2022-03-21 08:17 btif
drwxr-xr-x 2 root root 0 2022-03-21 08:17 ccci_md_sta
drwxr-xr-x 2 root root 0 2022-03-21 08:17 ccci_node
drwxr-xr-x 2 root root 0 2022-03-21 08:17 charger_ftm
drwxr-xr-x 2 root root 0 2022-03-21 08:17 devmap
drwxr-xr-x 2 root root 0 2022-03-21 08:17 drm
drwxr-xr-x 2 root root 0 2022-03-21 08:17 dual_role_usb
drwxr-xr-x 2 root root 0 2022-03-21 08:17 extcon
drwxr-xr-x 2 root root 0 2022-03-21 08:17 firmware
drwxr-xr-x 2 root root 0 2022-03-21 08:17 flashlight_core
drwxr-xr-x 2 root root 0 2022-03-21 08:17 fm
drwxr-xr-x 2 root root 0 2022-03-21 08:17 gauge
drwxr-xr-x 2 root root 0 2022-03-21 08:17 gpio
drwxr-xr-x 2 root root 0 2022-03-21 08:17 graphics
drwxr-xr-x 2 root root 0 2022-03-21 08:17 hidg
drwxr-xr-x 2 root root 0 2022-03-21 08:17 hidraw
drwxr-xr-x 2 root root 0 2022-03-21 08:17 i2c-adapter
drwxr-xr-x 2 root root 0 2022-03-21 08:17 ieee80211
drwxr-xr-x 2 root root 0 2022-03-21 08:17 input
drwxr-xr-x 2 root root 0 2022-03-21 08:17 ispdrv
drwxr-xr-x 2 root root 0 2022-03-21 08:17 leds
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mem
drwxr-xr-x 2 root root 0 2022-03-21 08:17 misc
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mix_event
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mmc_host
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mtk-adc-cali
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mtk_cmdq
drwxr-xr-x 2 root root 0 2022-03-21 08:17 mtk_disp_mgr
drwxr-xr-x 2 root root 0 2022-03-21 08:17 net
drwxr-xr-x 2 root root 0 2022-03-21 08:17 pmic_ftm
drwxr-xr-x 2 root root 0 2022-03-21 08:17 pmsg
drwxr-xr-x 2 root root 0 2022-03-21 08:17 power_supply
drwxr-xr-x 2 root root 0 2022-03-21 08:17 ppp
drwxr-xr-x 2 root root 0 2022-03-21 08:17 rc
drwxr-xr-x 2 root root 0 2022-03-21 08:17 regulator
drwxr-xr-x 2 root root 0 2022-03-21 08:17 rpmb
drwxr-xr-x 2 root root 0 2022-03-21 08:17 rpmb_dummy
drwxr-xr-x 2 root root 0 2022-03-21 08:17 rtc
drwxr-xr-x 2 root root 0 2022-03-21 08:17 scsi_device
drwxr-xr-x 2 root root 0 2022-03-21 08:17 scsi_disk
drwxr-xr-x 2 root root 0 2022-03-21 08:17 scsi_host
drwxr-xr-x 2 root root 0 2022-03-21 08:17 sec
drwxr-xr-x 2 root root 0 2022-03-21 08:17 sensor
drwxr-xr-x 2 root root 0 2022-03-21 08:17 sensordrv
drwxr-xr-x 2 root root 0 2022-03-21 08:17 sound
drwxr-xr-x 2 root root 0 2022-03-21 08:17 spi_master
drwxr-xr-x 2 root root 0 2022-03-21 08:17 stpbt
drwxr-xr-x 2 root root 0 2022-03-21 08:17 stpgps
drwxr-xr-x 2 root root 0 2022-03-21 08:17 stpwmt
drwxr-xr-x 2 root root 0 2022-03-21 08:17 switching_charger
drwxr-xr-x 2 root root 0 2022-03-21 08:17 thermal
drwxr-xr-x 2 root root 0 2022-03-21 08:17 tty
drwxr-xr-x 2 root root 0 2022-03-21 08:17 udc
drwxr-xr-x 2 root root 0 2022-03-21 08:17 usb_boost
drwxr-xr-x 2 root root 0 2022-03-21 08:17 usb_rawbulk
drwxr-xr-x 2 root root 0 2022-03-21 08:17 video4linux
drwxr-xr-x 2 root root 0 2022-03-21 08:17 wmtWifi
drwxr-xr-x 2 root root 0 2022-03-21 08:17 wmtdetect
drwxr-xr-x 2 root root 0 2022-03-21 08:17 xt_idletimer
drwxr-xr-x 2 root root 0 2022-03-21 08:17 zram-control
console:/sys/class #
console:/sys/class #
console:/sys/class # cd gpio/
console:/sys/class/gpio #
console:/sys/class/gpio # ls -l
total 0
--w------- 1 root root 4096 2022-03-21 08:17 export
lrwxrwxrwx 1 root root 0 2022-03-21 08:17 gpiochip343 -> ../../devices/platform/1000b000.pinctrl/gpio/gpiochip343
--w------- 1 root root 4096 2022-03-21 08:17 unexport
console:/sys/class/gpio #
console:/sys/class/gpio #
console:/sys/class/gpio #
console:/sys/class/gpio #
console:/sys/class/gpio #
console:/sys/class/gpio # echo 16 > export
1|console:/sys/class/gpio #
1|console:/sys/class/gpio # ls -l
total 0
--w------- 1 root root 4096 2022-03-21 08:18 export
lrwxrwxrwx 1 root root 0 2022-03-21 08:18 gpiochip343 -> ../../devices/platform/1000b000.pinctrl/gpio/gpiochip343
--w------- 1 root root 4096 2022-03-21 08:18 unexport
console:/sys/class/gpio #
console:/sys/class/gpio # cat /p
proc/ product/ product_services
console:/sys/class/gpio # cat /proc/version
Linux version 4.14.141 (nobody@android-build) (gcc version 4.9.x 20150123 (prerelease) (GCC)) #2 SMP PREEMPT Mon Mar 21 17:50:56 CST 2022
console:/sys/class/gpio #
console:/sys/class/gpio #
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
