| Message ID | 1524803118-32570-1-git-send-email-yamada.masahiro@socionext.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
2018-04-27 13:25 GMT+09:00 Masahiro Yamada <yamada.masahiro@socionext.com>: > 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> > --- To myself: Fix the typo in the subject boar -> board
diff --git a/arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts b/arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts index 2c1a92f..440c2e6 100644 --- a/arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts +++ b/arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts @@ -67,3 +67,11 @@ reg = <0>; }; }; + +&pinctrl_ether_rgmii { + tx { + pins = "RGMII_TXCLK", "RGMII_TXD0", "RGMII_TXD1", + "RGMII_TXD2", "RGMII_TXD3", "RGMII_TXCTL"; + drive-strength = <9>; + }; +};
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> --- arch/arm64/boot/dts/socionext/uniphier-ld20-ref.dts | 8 ++++++++ 1 file changed, 8 insertions(+)