target/linux/bcm27xx/patches-5.4/950-0111-lan78xx-Read-initial-EEE-status-from-DT.patch

From 6b4370dc812a5a982b687730e7d6f4f11626408f Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Fri, 9 Mar 2018 12:01:00 +0000
Subject: [PATCH] lan78xx: Read initial EEE status from DT

Add two new DT properties:
* microchip,eee-enabled  - a boolean to enable EEE
* microchip,tx-lpi-timer - time in microseconds to wait before entering
                           low power state

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 drivers/net/usb/lan78xx.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2617,6 +2617,22 @@ static int lan78xx_open(struct net_devic
 
 	netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
 
+	if (of_property_read_bool(dev->udev->dev.of_node,
+				  "microchip,eee-enabled")) {
+		struct ethtool_eee edata;
+		memset(&edata, 0, sizeof(edata));
+		edata.cmd = ETHTOOL_SEEE;
+		edata.advertised = ADVERTISED_1000baseT_Full |
+				   ADVERTISED_100baseT_Full;
+		edata.eee_enabled = true;
+		edata.tx_lpi_enabled = true;
+		if (of_property_read_u32(dev->udev->dev.of_node,
+					 "microchip,tx-lpi-timer",
+					 &edata.tx_lpi_timer))
+			edata.tx_lpi_timer = 600; /* non-aggressive */
+		(void)lan78xx_set_eee(net, &edata);
+	}
+
 	/* for Link Check */
 	if (dev->urb_intr) {
 		ret = usb_submit_urb(dev->urb_intr, GFP_KERNEL);