2 * OF helpers for network devices.
4 * This file is released under the GPLv2
6 * Initially copied out of arch/powerpc/kernel/prom_parse.c
8 #include <linux/etherdevice.h>
9 #include <linux/kernel.h>
10 #include <linux/of_net.h>
11 #include <linux/phy.h>
12 #include <linux/export.h>
15 * of_get_phy_mode - Get phy mode for given device_node
16 * @np: Pointer to the given device_node
18 * The function gets phy interface string from property 'phy-mode' or
19 * 'phy-connection-type', and return its index in phy_modes table, or errno in
22 int of_get_phy_mode(struct device_node *np)
27 err = of_property_read_string(np, "phy-mode", &pm);
29 err = of_property_read_string(np, "phy-connection-type", &pm);
33 for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)
34 if (!strcasecmp(pm, phy_modes(i)))
39 EXPORT_SYMBOL_GPL(of_get_phy_mode);
41 static const void *of_get_mac_addr(struct device_node *np, const char *name)
43 struct property *pp = of_find_property(np, name, NULL);
45 if (pp && pp->length == ETH_ALEN && is_valid_ether_addr(pp->value))
51 * Search the device tree for the best MAC address to use. 'mac-address' is
52 * checked first, because that is supposed to contain to "most recent" MAC
53 * address. If that isn't set, then 'local-mac-address' is checked next,
54 * because that is the default address. If that isn't set, then the obsolete
55 * 'address' is checked, just in case we're using an old device tree.
57 * Note that the 'address' property is supposed to contain a virtual address of
58 * the register set, but some DTS files have redefined that property to be the
61 * All-zero MAC addresses are rejected, because those could be properties that
62 * exist in the device tree, but were not set by U-Boot. For example, the
63 * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
64 * addresses. Some older U-Boots only initialized 'local-mac-address'. In
65 * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
68 const void *of_get_mac_address(struct device_node *np)
72 addr = of_get_mac_addr(np, "mac-address");
76 addr = of_get_mac_addr(np, "local-mac-address");
80 return of_get_mac_addr(np, "address");
82 EXPORT_SYMBOL(of_get_mac_address);