linux-kernel - [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1524538918-21141-1-git-send-email-joyce.ooi@intel.com>
Date:   Tue, 24 Apr 2018 11:01:58 +0800
From:   "Ooi, Joyce" <joyce.ooi@...el.com>
To:     Dinh Nguyen <dinguyen@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Ooi Joyce <joyce.ooi@...el.com>,
        See Chin Liang <chin.liang.see@...el.com>,
        Yves Vandervennet <yves.vandervennet@...el.com>,
        Ong Hean Loong <hean.loong.ong@...el.com>
Subject: [PATCH] arm64: dts: stratix10: Change pad skew values for EMAC0 PHY driver

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 <joyce.ooi@...el.com>
---
 .../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 */
 		};
-- 
1.7.1