#!/bin/sh backlight0.brightness=0 if [ "$bootsource" = "spi-nor" ]; then echo Boot source is SPI NOR, booting SD card firmware with rootfs on SD card boot mmc1 elif [ "$bootsource" = "mmc" ] && [ "$bootsource_instance" = "1" ]; then echo Boot source is SD card, booting SD card firmware with rootfs on SD card boot mmc1 else detect mmc3 if [ "$mmc3.boot" = "boot0" ]; then boot mmc3.0 else boot mmc3.1 fi fi