diff options
Diffstat (limited to 'ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch')
| -rw-r--r-- | ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch b/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch new file mode 100644 index 000000000..d3dfe92c5 --- /dev/null +++ b/ARM-dts-sun7i-pcduino3-nano-enable-RGMII-RX-TX-delay-on-PHY.patch @@ -0,0 +1,132 @@ +From patchwork Sun Oct 25 14:01:44 2020 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 7bit +X-Patchwork-Submitter: Adam Sampson <ats@offog.org> +X-Patchwork-Id: 11855267 +Return-Path: + <SRS0=8R9C=EA=lists.infradead.org=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@kernel.org> +X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on + aws-us-west-2-korg-lkml-1.web.codeaurora.org +X-Spam-Level: +X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, + DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, + MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, + USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 +Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) + by smtp.lore.kernel.org (Postfix) with ESMTP id D1D99C388F7 + for <linux-arm-kernel@archiver.kernel.org>; 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Sun, 25 Oct 2020 14:02:04 +0000 +Received: from ats by cartman.offog.org with local (Exim 4.94) + (envelope-from <ats@offog.org>) + id 1kWgao-0007UQ-4s; Sun, 25 Oct 2020 14:01:54 +0000 +From: Adam Sampson <ats@offog.org> +To: linux-sunxi@googlegroups.com, devicetree@vger.kernel.org, + linux-arm-kernel@lists.infradead.org +Subject: [PATCH] ARM: dts: sun7i: pcduino3-nano: enable RGMII RX/TX delay on + PHY +Date: Sun, 25 Oct 2020 14:01:44 +0000 +Message-Id: <20201025140144.28693-1-ats@offog.org> +X-Mailer: git-send-email 2.29.1 +MIME-Version: 1.0 +X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 +X-CRM114-CacheID: sfid-20201025_100205_812453_7FAF68C8 +X-CRM114-Status: GOOD ( 13.85 ) +X-BeenThere: linux-arm-kernel@lists.infradead.org +X-Mailman-Version: 2.1.29 +Precedence: list +List-Id: <linux-arm-kernel.lists.infradead.org> +List-Unsubscribe: + <http://lists.infradead.org/mailman/options/linux-arm-kernel>, + <mailto:linux-arm-kernel-request@lists.infradead.org?subject=unsubscribe> +List-Archive: <http://lists.infradead.org/pipermail/linux-arm-kernel/> +List-Post: <mailto:linux-arm-kernel@lists.infradead.org> +List-Help: <mailto:linux-arm-kernel-request@lists.infradead.org?subject=help> +List-Subscribe: + <http://lists.infradead.org/mailman/listinfo/linux-arm-kernel>, + <mailto:linux-arm-kernel-request@lists.infradead.org?subject=subscribe> +Cc: Adam Sampson <ats@offog.org> +Sender: "linux-arm-kernel" <linux-arm-kernel-bounces@lists.infradead.org> +Errors-To: + linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org + +The RX/TX delays for the Ethernet PHY on the Linksprite pcDuino 3 Nano +are configured in hardware, using resistors that are populated to pull +the RTL8211E's RXDLY/TXDLY pins low or high as needed. + +phy-mode should be set to rgmii-id to reflect this. Previously it was +set to rgmii, which used to work but now results in the delays being +disabled again as a result of the bugfix in commit bbc4d71d6354 ("net: +phy: realtek: fix rtl8211e rx/tx delay config"). + +Tested on two pcDuino 3 Nano boards purchased in 2015. Without this fix, +Ethernet works unreliably on one board and doesn't work at all on the +other. + +Fixes: 061035d456c9 ("ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board") +Signed-off-by: Adam Sampson <ats@offog.org> +Reviewed-by: Andrew Lunn <andrew@lunn.ch> +--- + arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts +index fce2f7fcd084..bf38c66c1815 100644 +--- a/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts ++++ b/arch/arm/boot/dts/sun7i-a20-pcduino3-nano.dts +@@ -1,5 +1,5 @@ + /* +- * Copyright 2015 Adam Sampson <ats@offog.org> ++ * Copyright 2015-2020 Adam Sampson <ats@offog.org> + * + * This file is dual-licensed: you can use it either under the terms + * of the GPL or the X11 license, at your option. Note that this dual +@@ -115,7 +115,7 @@ &gmac { + pinctrl-names = "default"; + pinctrl-0 = <&gmac_rgmii_pins>; + phy-handle = <&phy1>; +- phy-mode = "rgmii"; ++ phy-mode = "rgmii-id"; + status = "okay"; + }; + |