[PATCH 4.17 134/324] ARM64: dts: meson-axg: fix ethernet stability issue

Greg Kroah-Hartman
2018-08-23T08:52:26Z

From: Jerome Brunet <jbrunet@baylibre.com>

[ Upstream commit 6d28d577510f1a51f7ffbe830fdbf42077e0058b ]

Like the odroid-c2 and wetek, the s400 uses the RTL8211F and seems to
suffer from the kind of stability issue.

Doing an iperf3 download test, we can see a significant number of LPI
interrupts on the tx path. After a short while (5 to 15 seconds), the
network connection dies. If using rootfs over NFS, the connection may
also break during the boot sequence.

We still don't have a real explanation for this problem so let's disable
EEE once again.

Fixes: f6f6ac914b82 ("ARM64: dts: meson-axg: enable ethernet for A113D S400 board")
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/arm64/boot/dts/amlogic/meson-axg-s400.dts | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -19,9 +19,22 @@

&ethmac {
status = "okay";
- phy-mode = "rgmii";
pinctrl-0 = <&eth_rgmii_y_pins>;
pinctrl-names = "default";
+ phy-handle = <&eth_phy0>;
+ phy-mode = "rgmii";
+
+ mdio {
+ compatible = "snps,dwmac-mdio";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ eth_phy0: ethernet-phy@0 {
+ /* Realtek RTL8211F (0x001cc916) */
+ reg = <0>;
+ eee-broken-1000t;
+ };
+ };
};

&uart_A {