netdev - [PATCH net-next] net: broadcom: bcm4908

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Date:   Wed, 10 Mar 2021 09:48:13 +0100
From:   Rafał Miłecki <zajec5@...il.com>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: [PATCH net-next] net: broadcom: bcm4908_enet: read MAC from OF

From: Rafał Miłecki <rafal@...ecki.pl>

BCM4908 devices have MAC address accessible using NVMEM so it's needed
to use OF helper for reading it.

Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
---
 drivers/net/ethernet/broadcom/bcm4908_enet.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bcm4908_enet.c b/drivers/net/ethernet/broadcom/bcm4908_enet.c
index 50e3e7d8c723..0a04c0f83b76 100644
--- a/drivers/net/ethernet/broadcom/bcm4908_enet.c
+++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c
@@ -9,6 +9,7 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_net.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/string.h>
@@ -684,6 +685,7 @@ static int bcm4908_enet_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct net_device *netdev;
 	struct bcm4908_enet *enet;
+	const u8 *mac;
 	int err;
 
 	netdev = devm_alloc_etherdev(dev, sizeof(*enet));
@@ -713,7 +715,11 @@ static int bcm4908_enet_probe(struct platform_device *pdev)
 		return err;
 
 	SET_NETDEV_DEV(netdev, &pdev->dev);
-	eth_hw_addr_random(netdev);
+	mac = of_get_mac_address(dev->of_node);
+	if (!IS_ERR(mac))
+		ether_addr_copy(netdev->dev_addr, mac);
+	else
+		eth_hw_addr_random(netdev);
 	netdev->netdev_ops = &bcm4908_enet_netdev_ops;
 	netdev->min_mtu = ETH_ZLEN;
 	netdev->mtu = ETH_DATA_LEN;
-- 
2.26.2