u-boot/board/efi/efi-x86_payload/payload.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
 */

#include <common.h>
#include <usb.h>

int board_early_init_r(void)
{
	/*
	 * Make sure PCI bus is enumerated so that peripherals on the PCI bus
	 * can be discovered by their drivers
	 */
	pci_init();

	return 0;
}