From: Vladimir Oltean Date: Wed, 29 Sep 2021 11:52:26 +0000 (+0300) Subject: arm64: dts: ls1028a: mark internal links between Felix and ENETC as capable of flow... X-Git-Tag: v5.16-rc1~125^2~19^2~15 X-Git-Url: https://repo.jachan.dev/linux.git/commitdiff_plain/8fcea7be5736 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 Signed-off-by: Shawn Guo --- 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; }; };