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
);
42 * Search the device tree for the best MAC address to use. 'mac-address' is
43 * checked first, because that is supposed to contain to "most recent" MAC
44 * address. If that isn't set, then 'local-mac-address' is checked next,
45 * because that is the default address. If that isn't set, then the obsolete
46 * 'address' is checked, just in case we're using an old device tree.
48 * Note that the 'address' property is supposed to contain a virtual address of
49 * the register set, but some DTS files have redefined that property to be the
52 * All-zero MAC addresses are rejected, because those could be properties that
53 * exist in the device tree, but were not set by U-Boot. For example, the
54 * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
55 * addresses. Some older U-Boots only initialized 'local-mac-address'. In
56 * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
59 const void *of_get_mac_address(struct device_node
*np
)
63 pp
= of_find_property(np
, "mac-address", NULL
);
64 if (pp
&& (pp
->length
== 6) && is_valid_ether_addr(pp
->value
))
67 pp
= of_find_property(np
, "local-mac-address", NULL
);
68 if (pp
&& (pp
->length
== 6) && is_valid_ether_addr(pp
->value
))
71 pp
= of_find_property(np
, "address", NULL
);
72 if (pp
&& (pp
->length
== 6) && is_valid_ether_addr(pp
->value
))
77 EXPORT_SYMBOL(of_get_mac_address
);
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