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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (c) 2013 Google, Inc
4 */
5
6#include <vsprintf.h>
7#include <dm/device.h>
8#include <dm/ofnode.h>
9#include <dm/read.h>
10#include <dm/util.h>
11#include <linux/libfdt.h>
12#include <linux/list.h>
13
14#if CONFIG_IS_ENABLED(OF_REAL)
15int pci_get_devfn(struct udevice *dev)
16{
17 struct fdt_pci_addr addr;
18 int ret;
19
20 /* Extract the devfn from fdt_pci_addr */
21 ret = ofnode_read_pci_addr(dev_ofnode(dev), FDT_PCI_SPACE_CONFIG,
22 "reg", &addr, NULL);
23 if (ret) {
24 if (ret != -ENOENT)
25 return -EINVAL;
26 }
27
28 return addr.phys_hi & 0xff00;
29}
30#endif