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net: Set mac-address property 

Linux normally has no idea how to retrieve MAC Addresses, but instead
expects the MAC address in the devicetree. This patch adds the MAC
address to the devicetree for Linux if we find a valid one in barebox.
This mechanism is limited of course to devices barebox has a driver for
and which are probed themselves from the devicetree.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sascha Hauer 2013-06-04 09:35:56 +02:00
parent ebefdd4e0d
commit f696692b87
2 changed files with 55 additions and 0 deletions
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1
include/net.h
View File

@ -52,6 +52,7 @@ struct eth_device {
struct device_d dev;
struct device_d *parent;
char *nodepath;
struct list_head list;

54
net/eth.c
View File

@ -273,6 +273,52 @@ static int eth_set_ethaddr(struct device_d *dev, struct param_d *param, const ch
return 0;
}
#ifdef CONFIG_OFDEVICE
static int eth_of_fixup(struct device_node *root)
{
struct eth_device *edev;
struct device_node *node;
int ret;
/*
* Add the mac-address property for each network device we
* find a nodepath for and which has a valid mac address.
*/
list_for_each_entry(edev, &netdev_list, list) {
if (!edev->nodepath) {
dev_dbg(&edev->dev, "%s: no node to fixup\n", __func__);
continue;
}
if (!is_valid_ether_addr(edev->ethaddr)) {
dev_dbg(&edev->dev, "%s: no valid mac address, cannot fixup\n",
__func__);
continue;
}
node = of_find_node_by_path(root, edev->nodepath);
if (!node) {
dev_dbg(&edev->dev, "%s: fixup node %s not found\n",
__func__, edev->nodepath);
continue;
}
ret = of_set_property(node, "mac-address", edev->ethaddr, 6, 1);
if (ret)
pr_err("Setting mac-address property of %s failed with: %s\n",
node->full_name, strerror(-ret));
}
return 0;
}
static int eth_register_of_fixup(void)
{
return of_register_fixup(eth_of_fixup);
}
late_initcall(eth_register_of_fixup);
#endif
int eth_register(struct eth_device *edev)
{
struct device_d *dev = &edev->dev;
@ -316,6 +362,10 @@ int eth_register(struct eth_device *edev)
if (found)
register_preset_mac_address(edev, ethaddr);
if (IS_ENABLED(CONFIG_OFDEVICE) && edev->parent &&
edev->parent->device_node)
edev->nodepath = xstrdup(edev->parent->device_node->full_name);
if (!eth_current)
eth_current = edev;
@ -328,6 +378,10 @@ void eth_unregister(struct eth_device *edev)
eth_current = NULL;
dev_remove_parameters(&edev->dev);
if (IS_ENABLED(CONFIG_OFDEVICE) && edev->nodepath)
free(edev->nodepath);
unregister_device(&edev->dev);
list_del(&edev->list);
}