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Firmware can be updated using devlink if card is exposed on a host server using ptp_ocp driver.
For example, if PCI card is located on 0000:03:00.0 on the server:
> sudo cp art_card_vX_update.bin /lib/firmware
> sudo devlink dev flash pci/0000:03:00.0 file art_card_vX_update.bin
Then a power cycle is mandatory for the firmware update to complete. Starting from Rev3 of the card a reboot is sufficient for update to complete.
You may then see in the kernel messages the new firmware version displayed:
> sudo dmesg -w
/ ** /
[ 517.689840] ptp_ocp 0000:03:00.0: Version 0.0.X, clock NONE, device ptp2
/ ** /
Starting from Revision 4 of the board, the card has a USB-C port with an FTDI on it. This FTDI is configured to R/W the flash of the card. To update the card using the USB interface, one will need to install flashrom with libftdi already installed. Connect the USB cable to the computer that has flashrom installed then install. Use flashrom to flash the .rpd file on the card:
sudo ./flashrom -p ft2232_spi:type=4233H -c MT25QU256 -w <PATH to .rpd file>