From 6ed88d188a8240ba44da6578eab7d17e036d0e61 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 17 Oct 2017 15:04:29 +0100
Subject: [PATCH] lan78xx: Enable LEDs if no valid EEPROM or OTP

For applications of the LAN78xx that don't have valid programmed
EEPROMs or OTPs, enabling both LEDs by default seems reasonable.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 drivers/net/usb/lan78xx.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index a21039852f8d..cd20ce4ed87d 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2414,6 +2414,12 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 
 	ret = lan78xx_read_reg(dev, HW_CFG, &buf);
 	buf |= HW_CFG_MEF_;
+
+	/* If no valid EEPROM and no valid OTP, enable the LEDs by default */
+	if (lan78xx_read_eeprom(dev, 0, 0, NULL) &&
+	    lan78xx_read_otp(dev, 0, 0, NULL))
+	    buf |= HW_CFG_LED0_EN_ | HW_CFG_LED1_EN_;
+
 	ret = lan78xx_write_reg(dev, HW_CFG, buf);
 
 	ret = lan78xx_read_reg(dev, USB_CFG0, &buf);
From 4a4710f3847cd087e150f83382dffd92e09d9914 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Sat, 17 Mar 2018 00:10:02 +0100
Subject: [PATCH] lan78xx: Read MAC address from DT if present

There is a standard mechanism for locating and using a MAC address from
the Device Tree. Use this facility in the lan78xx driver to support
applications without programmed EEPROM or OTP.

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 drivers/net/usb/lan78xx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 60a604cc7647..a21039852f8d 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -36,6 +36,7 @@
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
 #include <linux/microchipphy.h>
+#include <linux/of_net.h>
 #include <linux/phy.h>
 #include "lan78xx.h"
 
@@ -1639,6 +1640,14 @@ static void lan78xx_init_mac_address(struct lan78xx_net *dev)
 	u32 addr_lo, addr_hi;
 	int ret;
 	u8 addr[6];
+	const u8 *mac_addr;
+
+	/* maybe the boot loader passed the MAC address in devicetree */
+	mac_addr = of_get_mac_address(dev->udev->dev.of_node);
+	if (mac_addr) {
+		ether_addr_copy(addr, mac_addr);
+		goto set_mac_addr;
+	}
 
 	ret = lan78xx_read_reg(dev, RX_ADDRL, &addr_lo);
 	ret = lan78xx_read_reg(dev, RX_ADDRH, &addr_hi);
@@ -1667,6 +1676,7 @@ static void lan78xx_init_mac_address(struct lan78xx_net *dev)
 					  "MAC address set to random addr");
 			}
 
+set_mac_addr:
 			addr_lo = addr[0] | (addr[1] << 8) |
 				  (addr[2] << 16) | (addr[3] << 24);
 			addr_hi = addr[4] | (addr[5] << 8);