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)
pci_get_devfn(struct udevice * dev)15 int 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
31