# a64 gpio interrupt init failed 如下`pc0`，`gpio64 `设置中断触发边沿失败。 ```bash ~$ tree /sys/class/gpio/gpio64/ ├── active_low ├── device -> ../../../1c20800.pinctrl ├── direction ├── power │   ├── async │   ├── autosuspend_delay_ms │   ├── control │   ├── runtime_active_kids │   ├── runtime_active_time │   ├── runtime_enabled │   ├── runtime_status │   ├── runtime_suspended_time │   └── runtime_usage ├── subsystem -> ../../../../../class/gpio ├── uevent └── value ``` 对比，`pb0` ` gpio32`，这里没有`edge` 属性。 ```bash ~$ tree /sys/class/gpio/gpio32 /sys/class/gpio/gpio32 ├── active_low ├── device -> ../../../1c20800.pinctrl ├── direction ├── edge ├── power │   ├── async │   ├── autosuspend_delay_ms │   ├── control │   ├── runtime_active_kids │   ├── runtime_active_time │   ├── runtime_enabled │   ├── runtime_status │   ├── runtime_suspended_time │   └── runtime_usage ├── subsystem -> ../../../../../class/gpio ├── uevent └── value ``` 对比`3.21.2.1. PB Configure Register 0 (Default Value: 0x77777777)` 和`3.21.2.10. PC Configure Register 0 (Default Value: 0x77777777)` 这里pc0 确实不支持中断。 > **提示**：`Allwinner_A64_User_Manual_V1.1_decrypted.pdf`->`Chapter 3 System`->`3.21. Port Controller(CPUx-PORT)`