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arm64: dts: uniphier: stabilize ethernet of LD20 reference board 

Currently, the ethernet RGMII mode on the LD20 reference board is
unstable.

The default drive-strength of ethernet TX pins is too strong because
there is no dumping resistor on the TX lines on the board.

Weaken the drive-strength to make the ethernet more stable.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2018-04-27 13:25:18 +09:00
parent f4e5200fc0
commit 8b82b66e68
1 changed files with 8 additions and 0 deletions
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8
arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts
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@ -67,3 +67,11 @@ ethphy: ethphy@0 {
reg = <0>;
};
};
&pinctrl_ether_rgmii {
tx {
pins = "RGMII_TXCLK", "RGMII_TXD0", "RGMII_TXD1",
"RGMII_TXD2", "RGMII_TXD3", "RGMII_TXCTL";
drive-strength = <9>;
};
};