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From 0b608345e114681f66ca0a3cf9d9434728da62ce Mon Sep 17 00:00:00 2001
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From: Ken Cox <ken@coxcampers.net>
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Date: Thu, 23 Jun 2011 10:36:43 -0500
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Subject: [PATCH] Support reading mac address from device tree.
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If CONFIG_OF is enabled, we will try to read the mac address from the device tree. This enables us the ability to have a "static" mac address on arm boards such as the pandaboard and beagleboard which generate random mac addresses.
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---
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drivers/net/usb/smsc75xx.c | 17 +++++++++++++++++
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drivers/net/usb/smsc95xx.c | 18 +++++++++++++++++-
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2 files changed, 34 insertions(+), 1 deletions(-)
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diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c
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index 753ee6e..ac0a200 100644
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--- a/drivers/net/usb/smsc75xx.c
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+++ b/drivers/net/usb/smsc75xx.c
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@@ -29,6 +29,7 @@
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#include <linux/crc32.h>
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#include <linux/usb/usbnet.h>
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#include <linux/slab.h>
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+#include <linux/of_device.h>
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#include "smsc75xx.h"
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#define SMSC_CHIPNAME "smsc75xx"
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@@ -658,6 +659,22 @@ static int smsc75xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
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static void smsc75xx_init_mac_address(struct usbnet *dev)
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{
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+ void *address;
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+#ifdef CONFIG_OF
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+ struct device_node *np;
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+
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+ /* try the device tree */
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+ np = of_find_node_by_name(NULL, "smsc75xx");
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+ if (np) {
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+ address = of_get_property(np, "local-mac-address", NULL);
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+ if (address) {
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+ memcpy(dev->net->dev_addr, address, ETH_ALEN);
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+ netif_dbg(dev, ifup, dev->net, "MAC address read from device tree\n");
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+ return;
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+ }
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+ }
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+#endif
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+
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/* try reading mac address from EEPROM */
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if (smsc75xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
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dev->net->dev_addr) == 0) {
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diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c
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index bc86f4b..c83942d 100644
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--- a/drivers/net/usb/smsc95xx.c
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+++ b/drivers/net/usb/smsc95xx.c
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@@ -29,6 +29,7 @@
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#include <linux/crc32.h>
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#include <linux/usb/usbnet.h>
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#include <linux/slab.h>
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+#include <linux/of_device.h>
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#include "smsc95xx.h"
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#define SMSC_CHIPNAME "smsc95xx"
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@@ -639,6 +640,22 @@ static int smsc95xx_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
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static void smsc95xx_init_mac_address(struct usbnet *dev)
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{
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+ void *address;
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+#ifdef CONFIG_OF
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+ struct device_node *np;
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+
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+ /* try the device tree */
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+ np = of_find_node_by_name(NULL, "smsc95xx");
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+ if (np) {
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+ address = of_get_property(np, "local-mac-address", NULL);
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+ if (address) {
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+ memcpy(dev->net->dev_addr, address, ETH_ALEN);
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+ netif_dbg(dev, ifup, dev->net, "MAC address read from device tree\n");
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+ return;
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+ }
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+ }
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+#endif
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+
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/* try reading mac address from EEPROM */
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if (smsc95xx_read_eeprom(dev, EEPROM_MAC_OFFSET, ETH_ALEN,
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dev->net->dev_addr) == 0) {
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@@ -648,7 +665,6 @@ static void smsc95xx_init_mac_address(struct usbnet *dev)
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return;
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}
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}
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-
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/* no eeprom, or eeprom values are invalid. generate random MAC */
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random_ether_addr(dev->net->dev_addr);
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netif_dbg(dev, ifup, dev->net, "MAC address set to random_ether_addr\n");
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--
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1.7.2.3
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