Switch off the usb output

Technical Support for Routers
1

Hi,
is it possible with a command switch off the power of the usb port? Obviusly after I need to power it on.
BR
Fabio

2

Something like this may be?

3

Which device, which firmware (including version)?

Do you want it permanently off, or to be able to control it from user space?

Some GL.iNet devices use a GPIO to control the power to the USB bus. Depending on the firmware, it may be possible to change the value at run time from user space.

4

Hi,
router is GL-AR300M-Ext with 3.019 FW. I want to control it from user space.
Thank you.
BR

5

I believe that it is /sys/devices/platform/leds-gpio/leds/gl-ar300m:green:usb

root@GL-AR300M:/sys/devices/platform/leds-gpio/leds/gl-ar300m:green:usb# ls -l
-rw-r--r--    1 root     root          4096 May 30 10:07 brightness
lrwxrwxrwx    1 root     root             0 May 30 10:07 device -> ../../../leds-gpio
-r--r--r--    1 root     root          4096 May 30 10:07 max_brightness
lrwxrwxrwx    1 root     root             0 May 30 10:07 subsystem -> ../../../../../class/leds
-rw-r--r--    1 root     root          4096 May 30 10:07 trigger
-rw-r--r--    1 root     root          4096 May 30 10:07 uevent

The following is unchecked, as I am not somewhere that I can confirm that it works, but I believe that

echo 0 > brightness

should turn it off and that

cat max_brightness > brightness

should turn it back on.

From target/linux/ar71xx/files/arch/mips/ath79/mach-gl-ar300m.c

#define GL_AR300M_GPIO_LED_USB          2

corresponds with GL-AR300M (Shadow) - GL.iNet Docs

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