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[i.MX] gpio access

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 楼主| isdqwq 发表于 2015-10-20 14:36 | 显示全部楼层 |阅读模式
access, GPIO, AN, TE, ST
为了防止RITA的习惯性问题.
BSP  Android 5.0  kernel 3.10.53  uboot 2014.04   
硬件是  IMX6Q  主板是自己设计的.我想下面要描述的问题应该与硬件无关了.
各位，你们的gpio access是如何做的.
是直接在android app里在访问 sys/class/gpio/gpioxx/value 文件吗?
如果是这样的话，Android 5.0增加了　 SELinux　功能．
这个开启的话， android app只能读gpio不能写呢　．
你们又是如何解决的.
我试过修改 SELinux的策略,
在file.te中增加
type gpio_control, fs_type, sysfs_type;
在 file_contexts文件增加下面行
/sys/devices/soc0/soc.1/2000000.aips-bus/20a0000.gpio/gpio/gpio32/value u:object_r:gpio_control:s0
这样增加的话，如果设备没有接u盘或者sdcard，可以正常启动进系统，在debug console下面检查 /sys/class/gpio/gpioxx/value 确实改为了 u:object_r:gpio_control:s0 ,如何检查的? ls -Z
但设备如果插入了sdcard 或者u盘,就引导不进系统了，
报下面的错误.请问各位是如何解决的.
复制
  1. init: Timed out waiting for /dev/.coldboot_done
    

  2. init: /dev/hw_random not found
    

  3. Console: switching to colour dummy device 80x30
    

  4. init: /dev/hw_random not found
    

  5. fs_mgr: Error opening device mapper (No such file or directory)fs_mgr: Could not set up verified partition, skipping!
    

  6. EXT4-fs (mmcblk3p4): Ignoring removed nomblk_io_submit option
    

  7. EXT4-fs (mmcblk3p4): mounted filesystem with ordered data mode. Opts: nomblk_io_submit,noauto_da_alloc,errors=panic
    

  8. fs_mgr: __mount(source=/dev/block/mmcblk3p4,target=/data,type=ext4)=0
    

  9. EXT4-fs (mmcblk3p6): Ignoring removed nomblk_io_submit option
    

  10. EXT4-fs (mmcblk3p6): mounted filesystem with ordered data mode. Opts: nomblk_io_submit
    

  11. fs_mgr: __mount(source=/dev/block/mmcblk3p6,target=/cache,type=ext4)=0
    

  12. EXT4-fs (mmcblk3p7): mounted filesystem with ordered data mode. Opts: (null)
    

  13. fs_mgr: __mount(source=/dev/block/mmcblk3p7,target=/device,type=ext4)=0
    

  14. init: cannot find '/system/bin/logd', disabling 'logd'
    

  15. init: cannot find '/system/bin/sh', disabling 'console'
    

  16. binder: 124:124 transaction failed 29189, size 0-0
    

  17. init: cannot find '/system/bin/lmkd', disabling 'lmkd'
    

  18. init: cannot find '/system/bin/servicemanager', disabling 'servicemanager'
    

  19. init: cannot find '/system/bin/vold', disabling 'vold'
    

  20. init: cannot find '/system/bin/surfaceflinger', disabling 'surfaceflinger'
    

  21. init: using deprecated syntax for specifying property 'ro.serialno', use ${name} instead
    

  22. init: using deprecated syntax for specifying property 'ro.product.manufacturer', use ${name} instead
    

  23. init: property 'ro.product.manufacturer' doesn't exist while expanding '$ro.product.manufacturer'
    

  24. init: cannot expand '$ro.product.manufacturer' while writing to '/sys/class/android_usb/android0/iManufacturer'
    

  25. init: using deprecated syntax for specifying property 'ro.product.model', use ${name} instead
    

  26. init: property 'ro.product.model' doesn't exist while expanding '$ro.product.model'
    

  27. init: cannot expand '$ro.product.model' while writing to '/sys/class/android_usb/android0/iProduct'
    

  28. init: cannot find '/system/bin/netd', disabling 'netd'
    

  29. init: cannot find '/system/bin/debuggerd', disabling 'debuggerd'
    

  30. init: cannot find '/system/bin/debuggerd64', disabling 'debuggerd64'
    

  31. init: cannot find '/system/bin/drmserver', disabling 'drm'
    

  32. init: cannot find '/system/bin/mediaserver', disabling 'media'
    

  33. init: cannot find '/system/bin/installd', disabling 'installd'
    

  34. init: cannot find '/system/bin/install-recovery.sh', disabling 'flash_recovery'
    

  35. init: cannot find '/system/bin/keystore', disabling 'keystore'
    

  36. init: cannot find '/system/bin/rild', disabling 'ril-daemon'
    

  37. init: cannot find '/system/bin/app_process', disabling 'zygote'
    

  38. init: cannot find '/system/bin/sh', disabling 'wifi_mac'
    

  39. init: cannot find '/system/bin/sdcard', disabling 'sdcard'
    

  40. init: cannot find '/system/bin/magd', disabling 'magd'
    

  41. android_usb: already disabled
    

  42. mtp_bind_config
    

  43. ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 12
    

  44. binder: 124:124 transaction failed 29189, size 0-0
    

  45. binder: 124:124 transaction failed 29189, size 0-0
    

  46. binder: 124:124 transaction failed 29189, size 0-0
    

  47. binder: 124:124 transaction failed 29189, size 0-0
    

  48. binder: 124:124 transaction failed 29189, size 0-0
    

  49. binder: 124:124 transaction failed 29189, size 0-0
    

  50. binder: 124:124 transaction failed 29189, size 0-0
    

  51. binder: 124:124 transaction failed 29189, size 0-0
    

  52. binder: 124:124 transaction failed 29189, size 0-0
    

  53. binder: 124:124 transaction failed 29189, size 0-0
    

  54. binder: 124:124 transaction failed 29189, size 0-0
    

  55. binder: 124:124 transaction failed 29189, size 0-0
    

  56. binder: 124:124 transaction failed 29189, size 0-0
    

  57. binder: 124:124 transaction failed 29189, size 0-0
    

  58. binder: 124:124 transaction failed 29189, size 0-0
    

  59. binder: 124:124 transaction failed 29189, size 0-0
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mini1986 发表于 2015-10-23 09:30 | 显示全部楼层
没搞过，帮你顶一下......不过，个人觉得，你自己写个GPIO驱动，HAL和JNI，让上层Java调用更直接......
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