I'm trying to reduce power on a imx8m board (Google Coral Dev board) while in an active state, but I'm struggling to find information about how to turn things off in software (e.g. HDMI, ethernet, LEDS from the terminal). Can anyone point me in the direction of documentation that can help? I've tried looking in the i.mx linux reference manual, but with no luck. E.g. does ifconfig eth0 down actually disable any power being drawn from the ethernet port? I've tried turning of LEDs following similar processes for a raspberry pi, but changing trigger values didn't result in any visible changes.