From 8fcea7be57365d32f98cefa9366cf4e37e597973 Mon Sep 17 00:00:00 2001
From: Vladimir Oltean <vladimir.oltean@nxp.com>
Date: Wed, 29 Sep 2021 14:52:26 +0300
Subject: [PATCH] arm64: dts: ls1028a: mark internal links between Felix and
ENETC as capable of flow control
The internal Ethernet switch suffers from erratum A-050484 ("Ethernet
flow control not functional on L2 switch NPI port when XFH is used").
XFH stands for "Extraction Frame Header" - which basically means the
default "ocelot" DSA tagging protocol.
However, the switch supports one other tagging protocol - "ocelot-8021q",
and this is not subject to the erratum above. So describe the hardware
ability to pass PAUSE frames in the device tree, and let the driver
figure out whether it should use flow control on the CPU port or not,
depending on whether the "ocelot" or "ocelot-8021q" tagging protocol is
being used.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
index c10c84d9495d..a13b998b2fbe 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi
@@ -1059,6 +1059,7 @@
fixed-link {
speed = <2500>;
full-duplex;
+ pause;
};
};
@@ -1117,6 +1118,7 @@
fixed-link {
speed = <2500>;
full-duplex;
+ pause;
};
};
@@ -1128,6 +1130,7 @@
fixed-link {
speed = <1000>;
full-duplex;
+ pause;
};
};
};
@@ -1142,6 +1145,7 @@
fixed-link {
speed = <1000>;
full-duplex;
+ pause;
};
};
--
2.42.0