Disabling USB/Ethernet chip on RasPi3?

    The combined USB/Ethernet chip (LAN9514) is a known power leech on the RasPi_s, and power consumption is a concern in my setup.

    In my setup, now having Raspi 3 I do not need either the Ethernet port, nor the USBs (networking over WiFi, which is onboard now (on a separate chip), so no need for a USB dongle).

    I know how to power down the LAN9514 in a Raspbian distribution, however I have no idea how to achieve this in LibreELEC.

    Does anyone know?

    Quote from escalade


    Maybe if you described how it's done in Raspbian.

    So, this is how you do it on Rasbian. What do you do for LibreELEC?

    As root:

    Bash
    #!/bin/bash
# disable
echo 0 > /sys/devices/platform/bcm2708_usb/buspower
# enable
echo 1 > /sys/devices/platform/bcm2708_usb/buspower

    accordingly, from a normal ssh, at the prompt session that would be:

    Code
    $ # disable
$ sudo sh -c 'echo 0x0 > /sys/devices/platform/bcm2708_usb/buspower'
$ # enable
$ sudo sh -c 'echo 0x1 > /sys/devices/platform/bcm2708usb/buspower'

    Alternatively instead of buspower there is also bussuspend, but that one cannot be reactivated, only by a reboot.

    See also here (Stackexchange) -- the chip alone draws 200 mA!

    Thanks,

    I would have tried, but don't have my libreELEC up and running yet.

    Is LibreELEC also Debian based? Or even Raspbian based?

    Anyway, I think this is useful info in general, as with the proliferation of Model 3 more and more setups might not need these interfaces either, and 200 mA is not peanuts!

    I know # is a comment, I put it in there myself, wasn't in my source I'd figure why not put workable code (resp. usual convention wrt. $-prompt) if using the [[Code]] tag.

    Edited once, last by szabi (November 23, 2016 at 2:40 PM).