Initial commit

target/linux/bcm27xx/patches-6.6/950-0400-net-bcmgenet-Add-eee-module-parameter.patch

@@ -0,0 +1,46 @@
+From 167d775d4cad4d41651ca81b79589bb9a408fd3c Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Wed, 14 Dec 2022 15:00:51 +0000
+Subject: [PATCH 0400/1085] net: bcmgenet: Add 'eee' module parameter
+
+On some switches, having EEE enabled causes the link to become
+unstable. With this patch, adding 'genet.eee=N' to the kernel command
+line will cause EEE to be disabled on the link.
+
+See: https://github.com/raspberrypi/linux/issues/4289
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ drivers/net/ethernet/broadcom/genet/bcmgenet.c | 14 ++++++++++++++
+ 1 file changed, 14 insertions(+)
+
+--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
++++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+@@ -70,6 +70,9 @@ static void bcmgenet_set_rx_mode(struct
+ static bool skip_umac_reset = false;
+ module_param(skip_umac_reset, bool, 0444);
+ MODULE_PARM_DESC(skip_umac_reset, "Skip UMAC reset step");
++static bool eee = true;
++module_param(eee, bool, 0444);
++MODULE_PARM_DESC(eee, "Enable EEE (default Y)");
+ 
+ static inline void bcmgenet_writel(u32 value, void __iomem *offset)
+ {
+@@ -3449,6 +3452,17 @@ static int bcmgenet_open(struct net_devi
+ 
+ 	bcmgenet_phy_pause_set(dev, priv->rx_pause, priv->tx_pause);
+ 
++	if (!eee) {
++		struct ethtool_eee eee_data;
++
++		ret = bcmgenet_get_eee(dev, &eee_data);
++		if (ret == 0) {
++			eee_data.eee_enabled = 0;
++			bcmgenet_set_eee(dev, &eee_data);
++			netdev_warn(dev, "EEE disabled\n");
++		}
++	}
++
+ 	bcmgenet_netif_start(dev);
+ 
+ 	netif_tx_start_all_queues(dev);