From nobody Tue Dec 16 21:35:29 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBE65C4332F for ; Sun, 29 Oct 2023 04:28:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230323AbjJ2E2s (ORCPT ); Sun, 29 Oct 2023 00:28:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53570 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229835AbjJ2E2X (ORCPT ); Sun, 29 Oct 2023 00:28:23 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e5ab]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80193171E; Sat, 28 Oct 2023 21:27:55 -0700 (PDT) Received: from localhost (unknown [188.24.143.101]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: cristicc) by madras.collabora.co.uk (Postfix) with ESMTPSA id 21E036607340; Sun, 29 Oct 2023 04:27:53 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1698553673; bh=AC+Ls3ytNnSvtsq4GFfS8dc+BFMLEfoCVREKO8KW7lU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RBPXQz2GQGNqffqr51uwLxSOhlWrlkDw3YEFs3NbSf/nxgGJOX1fcRb6/DIhxT13w gNjyWhoEGy6ckmKdXx87Nqn6KdlEUhVgboS5Gy40r6ymqy5eYtuWeajVDgkqWHVOJg I9Eq0d8Wil0pk8/ZKzljUpTNKrufiMAVWlMujcY4jig24W4WVWezOr+TOm0ymEetan +wqbErUZw9mkSdnV7eMBlLLnQohAi+RhCwneJRwQUHnmc2A1YWDiyDF/Dz2EApxyW0 gE2lcXa3TgbG+ktNl+mvhxtR5uG5p7bAN6zMkjQ4hj6Sc9sw7PqWb6bzfFLk0r7nza Our6kpSl5wJ0Q== From: Cristian Ciocaltea To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Emil Renner Berthing , Samin Guo , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Torgue , Jose Abreu , Maxime Coquelin , Richard Cochran , Giuseppe Cavallaro Cc: netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, kernel@collabora.com Subject: [PATCH v2 11/12] riscv: dts: starfive: visionfive-v1: Enable gmac and setup phy Date: Sun, 29 Oct 2023 06:27:11 +0200 Message-ID: <20231029042712.520010-12-cristian.ciocaltea@collabora.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231029042712.520010-1-cristian.ciocaltea@collabora.com> References: <20231029042712.520010-1-cristian.ciocaltea@collabora.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The StarFive VisionFive V1 SBC has a Motorcomm YT8521 PHY supporting RGMII-ID, but requires manual adjustment of the RX internal delay to work properly. The default RX delay provided by the driver is 1.95 ns, which proves to be too high. Applying a 50% reduction seems to mitigate the issue. Signed-off-by: Cristian Ciocaltea --- .../starfive/jh7100-starfive-visionfive-v1.dts | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts= b/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts index e82af72f1aaf..e043a27f7612 100644 --- a/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts +++ b/arch/riscv/boot/dts/starfive/jh7100-starfive-visionfive-v1.dts @@ -18,3 +18,20 @@ gpio-restart { priority =3D <224>; }; }; + +&gmac { + phy-handle =3D <&phy>; + phy-mode =3D "rgmii-id"; + status =3D "okay"; + + mdio { + #address-cells =3D <1>; + #size-cells =3D <0>; + compatible =3D "snps,dwmac-mdio"; + + phy: ethernet-phy@0 { + reg =3D <0>; + rx-internal-delay-ps =3D <900>; + }; + }; +}; --=20 2.42.0