[PATCH v2 net-next 7/9] net: korina: Add support for device tree

[Thomas Bogendoerfer]

If there is no mac address passed via platform data try to get it via
device tree and fall back to a random mac address, if all fail.

Signed-off-by: Thomas Bogendoerfer <tsbog...@alpha.franken.de>
---
 drivers/net/ethernet/korina.c | 29 ++++++++++++++++++++++++++---
 1 file changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/korina.c b/drivers/net/ethernet/korina.c
index 69c8baa87a6e..c4590b2c65aa 100644
--- a/drivers/net/ethernet/korina.c
+++ b/drivers/net/ethernet/korina.c
@@ -42,6 +42,8 @@
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
 #include <linux/in.h>
+#include <linux/of_device.h>
+#include <linux/of_net.h>
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/delay.h>
@@ -1056,7 +1058,7 @@ static const struct net_device_ops korina_netdev_ops = {
 
 static int korina_probe(struct platform_device *pdev)
 {
-       u8 *mac_addr = dev_get_platdata(&pdev->dev);
+       const u8 *mac_addr = dev_get_platdata(&pdev->dev);
        struct korina_private *lp;
        struct net_device *dev;
        void __iomem *p;
@@ -1069,7 +1071,15 @@ static int korina_probe(struct platform_device *pdev)
        SET_NETDEV_DEV(dev, &pdev->dev);
        lp = netdev_priv(dev);
 
-       memcpy(dev->dev_addr, mac_addr, ETH_ALEN);
+       if (mac_addr) {
+               ether_addr_copy(dev->dev_addr, mac_addr);
+       } else {
+               mac_addr = of_get_mac_address(pdev->dev.of_node);
+               if (!IS_ERR(mac_addr))
+                       ether_addr_copy(dev->dev_addr, mac_addr);
+               else
+                       eth_hw_addr_random(dev);
+       }
 
        lp->rx_irq = platform_get_irq_byname(pdev, "korina_rx");
        lp->tx_irq = platform_get_irq_byname(pdev, "korina_tx");
@@ -1149,8 +1159,21 @@ static int korina_remove(struct platform_device *pdev)
        return 0;
 }
 
+#ifdef CONFIG_OF
+static const struct of_device_id korina_match[] = {
+       {
+               .compatible = "korina",
+       },
+       { }
+};
+MODULE_DEVICE_TABLE(of, korina_match);
+#endif
+
 static struct platform_driver korina_driver = {
-       .driver.name = "korina",
+       .driver = {
+               .name = "korina",
+               .of_match_table = of_match_ptr(korina_match),
+       },
        .probe = korina_probe,
        .remove = korina_remove,
 };
-- 
2.29.2