lan78xx: Enable LEDs and auto-negotiation

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

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

Author: Phil Elwell

drivers/net/usb/lan78xx.c

@@ -3248,6 +3248,11 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 	unsigned long timeout;
 	int ret;
 	u32 buf;
+	bool has_eeprom;
+	bool has_otp;
+
+	has_eeprom = !lan78xx_read_eeprom(dev, 0, 0, NULL);
+	has_otp = !lan78xx_read_otp(dev, 0, 0, NULL);
 
 	ret = lan78xx_read_reg(dev, HW_CFG, &buf);
 	if (ret < 0)
@@ -3318,6 +3323,10 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 	buf |= HW_CFG_CLK125_EN_;
 	buf |= HW_CFG_REFCLK25_EN_;
 
+	/* If no valid EEPROM and no valid OTP, enable the LEDs by default */
+	if (!has_eeprom && !has_otp)
+	    buf |= HW_CFG_LED0_EN_ | HW_CFG_LED1_EN_;
+
 	ret = lan78xx_write_reg(dev, HW_CFG, buf);
 	if (ret < 0)
 		return ret;
@@ -3410,6 +3419,10 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 	if (dev->chipid == ID_REV_CHIP_ID_7801_)
 		buf &= ~MAC_CR_GMII_EN_;
 
+	/* If no valid EEPROM and no valid OTP, enable AUTO negotiation */
+	if (!has_eeprom && !has_otp)
+	    buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
+
 	ret = lan78xx_write_reg(dev, MAC_CR, buf);
 	if (ret < 0)
 		return ret;