Re: Raspbery Pi support (release notes/wiki page) update?

On Dec 2, 2024, at 12:43, Bjoern A. Zeeb <[email protected]> wrote:

> On Wed, 27 Nov 2024, Mark Millard wrote:
> 
> I assume that all also means there's no way on FreeBSD to update the
> eeprom contents on the RPi4/5[1] (contents replaced the bootcode.bin on
> older PIs.)

I update the EEPROM's via booting a standard RaspiOS64 (my abbreviation).
That includes updating some defaults/definitions that can be stored in
the EEPROM. (For example, I enable more debug output than is the
default. That includes enabling BOOT_UART .)

There are commands like: sudo -E rpi-eeprom-config --edit

I'm  not aware of FreeBSD having any such software, even via the ports
tree.

However, the description of the command is:

QUOTE
Editing the current bootloader configuration
The following command loads the current bootloader configuration into a text editor. When the editor is closed, rpi-eeprom-configapplies the updated configuration to latest available bootloader release and uses rpi-eeprom-update to schedule an update when the system is rebooted:
END QUOTE

In essence doing a (after the edit): sudo rpi-eeprom-update -a

I do not have the references handy, but as I remember, this puts a
file in the msdosfs that, if found at (re)boot, is automatically
used to do the EEPROM update, well before U-boot is involved.

So: putting a correctly formed file in the right place with the
right name for a reboot to pick up is basic to the EEPROM update
operation.

The EEPROM contains the bootloader. The RPi5B has less that goes
in the msdosfs (on the microsd card I use to boot the RPi5 via
a separate USB3 drive):

# find /RPi5-edk2/ -print
/RPi5-edk2/
/RPi5-edk2/RPI_EFI.fd
/RPi5-edk2/config.txt
/RPi5-edk2/bcm2712-rpi-5-b.dtb

Nothing analogous to start4*.elf or fixup4*.dat is involved.

# more /RPi5-edk2/config.txt
armstub=RPI_EFI.fd
device_tree_address=0x1f0000
device_tree_end=0x210000

# Force 32 bpp framebuffer allocation.
framebuffer_depth=32

# Disable compensation for displays with overscan.
disable_overscan=1

# Force maximum USB power regardless of the power supply.
usb_max_current_enable=1

# Force maximum CPU speed.
force_turbo=1

#
# Local additions:
enable_uart=1
uart_2ndstage=1
dtdebug=1
disable_commandline_tags=1
#
[pi5]
over_voltage_delta=100000
arm_freq=2600
[all]

> /bz
> 
> 
> [1] https://github.com/raspberrypi/rpi-eeprom/tree/master/

Releases: https://github.com/raspberrypi/rpi-eeprom/releases

Tagged: https://github.com/raspberrypi/rpi-eeprom/tags

(More is tagged than is eventually declared to also be a
release.)

===
Mark Millard
marklmi at yahoo.com