From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.fris.de (mail.fris.de [116.203.77.234]) (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 ADE293F413D for ; Wed, 13 May 2026 13:35:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=116.203.77.234 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778679309; cv=none; b=ftwQob8FVcXw6e9ZmdahL7DmU0XROfEP43kD92xHhCO4T4zCQ+8WtrxFtJh33FBAmXRuuLHQqHzGnDv8PIZ+8DrJKUuUTI+qcKh7TmBomb6wzbcZ1XgqeGVv3wWq7PW/STOjrmG2GemLwVpMHsRypQCCKLhBD2OxhKiBiveFBcQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778679309; c=relaxed/simple; bh=H9EBgfH+lV5rWacyg1lHuzWtpGQKgNhKzTbQrV6d3pA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=HhO+UtJBrkddEIpSufZ8fybdvBqs7iIhm4cQPA/s4WJjObNaUuIoXQ3wlU9BIBo6Ord0g32SgOItzFNEphAIV91eGzTecHlli9ucnWgp5k4eFkZfmpVnyc3FWLiPpafTwidkk3yWGRAw5lVY7SnkF7mkdjVe3jlqMDJvhpRkV2w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fris.de; spf=pass smtp.mailfrom=fris.de; dkim=pass (2048-bit key) header.d=fris.de header.i=@fris.de header.b=dqcGHZiQ; arc=none smtp.client-ip=116.203.77.234 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=fris.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=fris.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=fris.de header.i=@fris.de header.b="dqcGHZiQ" 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> Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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