Since this is an OF only driver, of_ instead of device_ allows nvmem to
be used to specify the MAC address.

Add EPROBE_DEFER handling for NVMEM.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/net/ethernet/microchip/enc28j60.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/microchip/enc28j60.c b/drivers/net/ethernet/microchip/enc28j60.c
index d6c9491537e4..2b9b4163e419 100644
--- a/drivers/net/ethernet/microchip/enc28j60.c
+++ b/drivers/net/ethernet/microchip/enc28j60.c
@@ -24,6 +24,7 @@
 #include <linux/skbuff.h>
 #include <linux/delay.h>
 #include <linux/spi/spi.h>
+#include <linux/of_net.h>
 
 #include "enc28j60_hw.h"
 
@@ -1554,7 +1555,10 @@ static int enc28j60_probe(struct spi_device *spi)
 		goto error_irq;
 	}
 
-	if (device_get_ethdev_address(&spi->dev, dev))
+	ret = of_get_ethdev_address(spi->dev.of_node, dev);
+	if (ret == -EPROBE_DEFER)
+		return ret;
+	if (ret)
 		eth_hw_addr_random(dev);
 	enc28j60_set_hw_macaddr(dev);
 
-- 
2.54.0