From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dinh Nguyen Subject: Re: [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver Date: Tue, 24 Apr 2018 10:13:50 -0500 Message-ID: References: <1524538918-21141-1-git-send-email-joyce.ooi@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1524538918-21141-1-git-send-email-joyce.ooi@intel.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org To: "Ooi, Joyce" , Rob Herring , Mark Rutland , Catalin Marinas , Will Deacon Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, See Chin Liang , Yves Vandervennet , Ong Hean Loong List-Id: devicetree@vger.kernel.org On 04/23/2018 10:01 PM, Ooi, Joyce wrote: > The HPS EMAC0 drive strength is changed to 4mA because the initial 8mA > drive strength has caused CE test to fail. This requires changes on the > pad skew for EMAC0 PHY driver. Based on several measurements done, Tx > clock does not require the extra 0.96ns delay. > > Signed-off-by: Ooi, Joyce > --- > .../boot/dts/altera/socfpga_stratix10_socdk.dts | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts > index 0007564..8785f78 100644 > --- a/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts > +++ b/arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts > @@ -79,7 +79,7 @@ > rxd2-skew-ps = <420>; /* 0ps */ > rxd3-skew-ps = <420>; /* 0ps */ > txen-skew-ps = <0>; /* -420ps */ > - txc-skew-ps = <1860>; /* 960ps */ > + txc-skew-ps = <900>; /* 0ps */ > rxdv-skew-ps = <420>; /* 0ps */ > rxc-skew-ps = <1680>; /* 780ps */ > }; > Applied, thanks! Dinh