From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3CC1DCD4851 for ; Wed, 13 May 2026 13:25:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=mMkApyIviwgjNGP53yywhnyZBKW4nkYb6GZmulufeM4=; b=NCZghi4ri3mP3Q3CsdfR5vk7ZP k0rKa7qCahvpLeqBnl4hLsDx8ZFun9xg+VlUKoNilWYjyv5U5zF4N2HwUC3tbnGrabat0jiOdPWAq lWm2tBMybzUIhyvi1R/hHQ5XS02+SOYS/SE3R/ZR2NAPOrjeC6C0KyVrChHsL0HPfGoOWsMCoDotw /haH2SipLdKdD9mQGKp5toV7kUu+K44V0MVXZDFRZsMW1vO5Pp9tPzuXsBEEkTHXhvMoNAXW58YSW lotk0qckLwmXlhTXNkBE6nbxYSmE2zYSITOLCUUqzsWZh1hoGNU1SYbTUO3nvTPC9vvfhQb3P+yS2 e1pYVnlQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wN9ar-00000002k0B-16Zl; Wed, 13 May 2026 13:25:45 +0000 Received: from mail.fris.de ([116.203.77.234]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wN9ao-00000002jxl-1c6e for linux-arm-kernel@lists.infradead.org; Wed, 13 May 2026 13:25:44 +0000 From: Frieder Schrempf DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fris.de; s=mail; t=1778678735; 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=mMkApyIviwgjNGP53yywhnyZBKW4nkYb6GZmulufeM4=; b=dqcGHZiQN58x4IPPdCp2jAbA+C0mABFjwNoaFF883c04K/O8ROemh2Jjl6HWQXt8o+NT5L W4J8KLTktYm4/C+UcmfGS8L1AMP9sEXv5/73q+iJz6rL7V1clY08wmVlN6Fl+IGsCR+Tsu 9r8W799ZwrVz1HuDpfOsvxihumCY1E8F1FoxL45bo2z7exQrQ9mxHMIMhY7fQKPkzlVFdh JvXjmzZa5uoe3awod5uzfvGxXQ4SUxvW0sY6HZ20jWFbyNZz6b4QKw2xFyZMZjGcaoFaSW wzwAGBwZ84uitc5N/NX50nv1cd58/NkMm+9WC5PeQHZD6NbLBvut3WP9xU/P6w== To: Conor Dooley , devicetree@vger.kernel.org, Frank Li , Frieder Schrempf , imx@lists.linux.dev, Krzysztof Kozlowski , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Rob Herring , Sascha Hauer , Shawn Guo Cc: Annette Kobou , Fabio Estevam , Pengutronix Kernel Team Subject: [PATCH] arm64: dts: imx8mp-kontron: Reduce EERAM SPI clock frequency Date: Wed, 13 May 2026 15:25:31 +0200 Message-ID: <20260513132533.589783-1-frieder@fris.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260513_062542_851713_C6CC822C X-CRM114-Status: UNSURE ( 9.27 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Frieder Schrempf There is an onboard level shifter for the SPI signals that causes additional propagation delay and renders the SPI transmission unreliable at 20 MHz. Reduce the clock frequency to a safe value. Fixes: 946ab10e3f40 ("arm64: dts: Add support for Kontron OSM-S i.MX8MP SoM and BL carrier board") Signed-off-by: Frieder Schrempf --- arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts b/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts index 0924ac50fd2d..75ae46642782 100644 --- a/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts +++ b/arch/arm64/boot/dts/freescale/imx8mp-kontron-bl-osm-s.dts @@ -63,7 +63,7 @@ &ecspi2 { eeram@0 { compatible = "microchip,48l640"; reg = <0>; - spi-max-frequency = <20000000>; + spi-max-frequency = <16000000>; }; }; -- 2.54.0