| Message ID | 1524803118-32570-1-git-send-email-yamada.masahiro@socionext.com |
|---|---|
| State | Accepted |
| Commit | 8b82b66e68b32dd8e22a04db6a0494bfdd65156f |
| Headers | show |
| Series | arm64: dts: uniphier: stabilize ethernet of LD20 reference boar | expand |
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 -- Best Regards Masahiro Yamada -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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(+) -- 2.7.4 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html