linux-imx

/*

 * OF helpers for network devices.

 *

 * This file is released under the GPLv2

 *

 * Initially copied out of arch/powerpc/kernel/prom_parse.c

 */

#include <linux/etherdevice.h>

#include <linux/kernel.h>

#include <linux/nvmem-consumer.h>

#include <linux/of_net.h>

#include <linux/phy.h>

#include <linux/export.h>

​

/**

 * of_get_phy_mode - Get phy mode for given device_node

 * @np: Pointer to the given device_node

 *

 * The function gets phy interface string from property 'phy-mode' or

 * 'phy-connection-type', and return its index in phy_modes table, or errno in

 * error case.

 */

int of_get_phy_mode(struct device_node *np)

{

    const char *pm;

    int err, i;

​

    err = of_property_read_string(np, "phy-mode", &pm);

    if (err < 0)

        err = of_property_read_string(np, "phy-connection-type", &pm);

    if (err < 0)

        return err;

​

    for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)

        if (!strcasecmp(pm, phy_modes(i)))

            return i;

​

    return -ENODEV;

}

EXPORT_SYMBOL_GPL(of_get_phy_mode);

​

static const void *of_get_mac_addr(struct device_node *np, const char *name)

{

    struct property *pp = of_find_property(np, name, NULL);

​

    if (pp && pp->length == ETH_ALEN && is_valid_ether_addr(pp->value))

        return pp->value;

    return NULL;

}

​

/**

 * Search the device tree for the best MAC address to use.  'mac-address' is

 * checked first, because that is supposed to contain to "most recent" MAC

 * address. If that isn't set, then 'local-mac-address' is checked next,

 * because that is the default address.  If that isn't set, then the obsolete

 * 'address' is checked, just in case we're using an old device tree.

 *

 * Note that the 'address' property is supposed to contain a virtual address of

 * the register set, but some DTS files have redefined that property to be the

 * MAC address.

 *

 * All-zero MAC addresses are rejected, because those could be properties that

 * exist in the device tree, but were not set by U-Boot.  For example, the