Could you help to to drive this ? thanks for any help
root@OpenWrt:~# ls /sys/class/gpio/
buzzer export gpiochip416 gpiochip448 gpiochip480 unexport usb_power
root@OpenWrt:~# ls /sys/class/gpio/buzzer/
active_low device subsystem uevent value
root@OpenWrt:~# cat /sys/kernel/debug/gpio
gpiochip2: GPIOs 416-447, parent: platform/1e000600.gpio, 1e000600.gpio-bank2:
gpiochip1: GPIOs 448-479, parent: platform/1e000600.gpio, 1e000600.gpio-bank1:
gpiochip0: GPIOs 480-511, parent: platform/1e000600.gpio, 1e000600.gpio-bank0:
gpio-480 ( |green:usr ) out hi
gpio-492 ( |usb_power ) out hi
gpio-493 ( |mode ) in hi IRQ ACTIVE LOW
**gpio-495 ( |buzzer ) out lo**
gpio-496 ( |blue:pwr ) out hi
gpio-498 ( |reset ) in hi IRQ ACTIVE LOW