From nobody Sat Jul 25 19:29:10 2026 Received: from mout-p-201.mailbox.org (mout-p-201.mailbox.org [80.241.56.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E30E4453497; Tue, 14 Jul 2026 13:05:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=80.241.56.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784034349; cv=none; b=uVVAZT55yHt8qnHmUXkprVw9c4kvprkJoYGexjkr4PubrFlDf9OqSxYgdWZAw1VyM6IekI1dA5d4vBQ3ervw9cjT0VJ/6Ca7OB5ZGvvaMRTiJZAIdyNDGilhX+eLhi0mVs7Y8RF0t5gTPeNtF27+z4HSvi1VmNw/+qIKSsAujHI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784034349; c=relaxed/simple; bh=4MPw1VMsxv2Gqokll7zTIYYLVZPmA6lN8j4JEBD6HSk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bMz2I0N/61i0sNXS+dbOlpB4OaQ4x8Pf5Li4fG3wLpD3vPx2X//l+oo8QGwAijKt7i4BqmgA1pZ9tz4Q7cdsCIk+1WEN92bEGPRrh/5S0EAQJOYUWaDw/t/Mgiid6UyOEeEA/cF2OyoeTM1ZWczNU6k0FycUqu8RGOh45hYTO7M= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org; spf=pass smtp.mailfrom=mailbox.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=Af54Un0G; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b=V6LaFXM2; arc=none smtp.client-ip=80.241.56.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=mailbox.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mailbox.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="Af54Un0G"; dkim=pass (2048-bit key) header.d=mailbox.org header.i=@mailbox.org header.b="V6LaFXM2" Received: from smtp1.mailbox.org (smtp1.mailbox.org [10.196.197.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA512) (No client certificate requested) by mout-p-201.mailbox.org (Postfix) with ESMTPS id 4h000n5njHzMlV5; Tue, 14 Jul 2026 15:05:45 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1784034345; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=jtBaYTpQ2+EKQzLC2rq0fDxMm0BG4JHJD/eHUR6sp4s=; b=Af54Un0Gasiptj3vxhw/JB+iJfG2DSbzzVg3QUceNOH0O1GPm8cC3+QG7wpQdzh5VTAIjs z9rEtIalSwab6MjRzmXvdB4aAPpFyYpv6FkwQvsCSKFfjIV5FsERzGH78K55jo+Mia8+/t /868ROE8DnyzzWoSlPZXNnFa3XYS5FGu0P3AVSKMWoK11JCw5crRhuMCwYBectNjyh+lGA IVkZpnhdckeydZ8RG5NoFj7Yc3d/1QhHQvRL9ZxGOKWHMgTZlMvDJec7+WZeYQupjmPHzy 257KjuW5AsqM8FT2Pz/F9TElo+qLaVCyGl6hmWytEHs15GIy8uJCt2+Y6SYUUw== From: Marek Vasut DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mailbox.org; s=mail20150812; t=1784034343; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=jtBaYTpQ2+EKQzLC2rq0fDxMm0BG4JHJD/eHUR6sp4s=; b=V6LaFXM2Jfj1LxFqYs7KQcguefx8tJOLi/alWaKiaJG0yJzGp/8zF2ZclKfY1CJ32Kh4id wuiULoBWewgr8HlfGNq1Wx5NybzQyv2B73JEdP9WEJimjsBUGqC8FbSbShnoFjOGdgE0Nr 1f63QthHbTOWTake4BI1FOtnBCdJwqIaevbOt6Qut15aYAwXExxUY+WQlr8oYzO22anIcJ YxzPe1mJ7r5ig5hSzqhO2hHkIuE8lHD2YwLHfHyUOS8Jm5PgRkP0WwOGw/3M/r/PYEVbiZ LWrA3FtxgoHASjRnuVarOcWE0f0+RWCKX840x+nHg1tCbEGy5bEaB5DJVwp7uw== To: linux-arm-kernel@lists.infradead.org Cc: Marek Vasut , Conor Dooley , Geert Uytterhoeven , Krzysztof Kozlowski , Magnus Damm , Rob Herring , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH] arm64: dts: renesas: beacon: Specify ethernet PHY reset timings Date: Tue, 14 Jul 2026 15:05:28 +0200 Message-ID: <20260714130539.11287-1-marek.vasut+renesas@mailbox.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MBO-RS-ID: 9d8efed93b3dc8ef9cd X-MBO-RS-META: iwbu3zffk1xnaopoaew7i1d8js7ftn4g Content-Type: text/plain; charset="utf-8" The KSZ9131RNX reference manual [1] DS00002841D page 131 FIGURE 6-2: POWER SEQUENCE TIMING INTERNAL REGULATORS does not indicate how long should the system wait after deassertion of the PHY reset and before starting communication with the PHY via MDIO. Opt for the same value as used for KSZ9031RNX, which is 300 us. The KSZ9131RNX reference manual [1] DS00002841D page 131 FIGURE 6-2: POWER SEQUENCE TIMING INTERNAL REGULATORS row tSR Stable supply voltages to de-assertion of reset is at minimum 10 ms. Set DT property reset-assert-us to 10ms because the KSZ9131RNX RM does not explicitly spell out how long the reset has to be asserted, but this at least covers the worst case scenario. [1] https://ww1.microchip.com/downloads/aemDocuments/documents/UNG/ProductD= ocuments/DataSheets/00002841D.pdf Signed-off-by: Marek Vasut --- Cc: Conor Dooley Cc: Geert Uytterhoeven Cc: Krzysztof Kozlowski Cc: Magnus Damm Cc: Rob Herring Cc: devicetree@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org --- arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi b/arch/arm= 64/boot/dts/renesas/beacon-renesom-som.dtsi index f8442b6a85a75..8723e7a76c9dd 100644 --- a/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi +++ b/arch/arm64/boot/dts/renesas/beacon-renesom-som.dtsi @@ -60,12 +60,14 @@ &avb { =20 phy0: ethernet-phy@0 { compatible =3D "ethernet-phy-id0022.1640"; reg =3D <0>; interrupts-extended =3D <&gpio2 11 IRQ_TYPE_LEVEL_LOW>; reset-gpios =3D <&gpio2 10 GPIO_ACTIVE_LOW>; + reset-assert-us =3D <10000>; + reset-deassert-us =3D <300>; }; }; =20 &extal_clk { clock-frequency =3D <16666666>; }; --=20 2.53.0