From: Frieder Schrempf <frieder@fris.de>
To: Conor Dooley <conor+dt@kernel.org>,
devicetree@vger.kernel.org, Frank Li <Frank.Li@nxp.com>,
Frieder Schrempf <frieder.schrempf@kontron.de>,
imx@lists.linux.dev, Krzysztof Kozlowski <krzk+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Shawn Guo <shawnguo@kernel.org>
Cc: Annette Kobou <annette.kobou@kontron.de>,
Fabio Estevam <festevam@gmail.com>,
Pengutronix Kernel Team <kernel@pengutronix.de>
Subject: [PATCH] arm64: dts: imx8mp-kontron: Reduce EERAM SPI clock frequency
Date: Wed, 13 May 2026 15:25:31 +0200 [thread overview]
Message-ID: <20260513132533.589783-1-frieder@fris.de> (raw)
From: Frieder Schrempf <frieder.schrempf@kontron.de>
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 <frieder.schrempf@kontron.de>
---
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
reply other threads:[~2026-05-13 13:35 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260513132533.589783-1-frieder@fris.de \
--to=frieder@fris.de \
--cc=Frank.Li@nxp.com \
--cc=annette.kobou@kontron.de \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=festevam@gmail.com \
--cc=frieder.schrempf@kontron.de \
--cc=imx@lists.linux.dev \
--cc=kernel@pengutronix.de \
--cc=krzk+dt@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=robh@kernel.org \
--cc=s.hauer@pengutronix.de \
--cc=shawnguo@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox