linux-kernel - [PATCH net-next v2 2/2] lan78xx: Enable Auto Speed and Auto Duplex configuration for LAN7801 if NO EEPROM is detected

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Date: Tue, 14 May 2024 21:32:01 +0530
From: Rengarajan S <rengarajan.s@...rochip.com>
To: <woojung.huh@...rochip.com>, <UNGLinuxDriver@...rochip.com>,
	<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
	<pabeni@...hat.com>, <netdev@...r.kernel.org>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC: <rengarajan.s@...rochip.com>
Subject: [PATCH net-next v2 2/2] lan78xx: Enable Auto Speed and Auto Duplex configuration for LAN7801 if NO EEPROM is detected

Enabled ASD/ADD configuration for LAN7801 in the absence of EEPROM.
After the lite reset these contents go back to defaults where ASD/
ADD is disabled. The check is already available for LAN7800.

Signed-off-by: Rengarajan S <rengarajan.s@...rochip.com>
---
 drivers/net/usb/lan78xx.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 7ac540cc3686..62dbfff8dad4 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -3034,8 +3034,11 @@ static int lan78xx_reset(struct lan78xx_net *dev)
 		return ret;
 
 	/* LAN7801 only has RGMII mode */
-	if (dev->chipid == ID_REV_CHIP_ID_7801_)
+	if (dev->chipid == ID_REV_CHIP_ID_7801_) {
 		buf &= ~MAC_CR_GMII_EN_;
+		/* Enable Auto Duplex and Auto speed */
+		buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
+	}
 
 	if (dev->chipid == ID_REV_CHIP_ID_7800_ ||
 	    dev->chipid == ID_REV_CHIP_ID_7850_) {
-- 
2.25.1