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base repository: agherzan/meta-raspberrypi
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head repository: agherzan/meta-raspberrypi
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compare: fedae883015931a17a1a04ad698a65c937bfb3cc
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Showing with 14 additions and 0 deletions.
  1. +14 −0 docs/extra-build-config.md
14 changes: 14 additions & 0 deletions docs/extra-build-config.md
Original file line number Diff line number Diff line change
@@ -74,6 +74,20 @@ To remove (or adjust) this delay set these variables in local.conf:
BOOT_DELAY = "0"
BOOT_DELAY_MS = "0"

## Boot media

The Raspberry Pi 4 board can load the boot image files from SD card and USB memory.
By default SD card media is used as boot media.

To switch the boot media from SD card the following variables are supported
in local.conf: `CMDLINE_ROOT_PARTITION` and `BOOT_MEDIA`.

For example, if you want to use USB boot, please define
the following parameters in your local.conf file.

CMDLINE_ROOT_PARTITION = "/dev/sda2"
BOOT_MEDIA = "usb"

## Set overclocking options

The Raspberry Pi can be overclocked. As of now overclocking up to the "Turbo