From: Tim Harvey <tharvey@gateworks.com>
Date: Wed, 4 Jun 2025 22:56:30 +0000 (-0700)
Subject: arm64: dts: imx8mp-venice-gw74xx: fix TPM SPI frequency
X-Git-Tag: v6.6.100~85
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bec18ebcf05c69ae44a43af9731d527240c2f919;p=thirdparty%2Fkernel%2Fstable.git

arm64: dts: imx8mp-venice-gw74xx: fix TPM SPI frequency

commit 0bdaca0922175478ddeadf8e515faa5269f6fae6 upstream.

The IMX8MPDS Table 37 [1] shows that the max SPI master read frequency
depends on the pins the interface is muxed behind with ECSPI2
muxed behind ECSPI2 supporting up to 25MHz.

Adjust the spi-max-frequency based on these findings.

[1] https://www.nxp.com/webapp/Download?colCode=IMX8MPIEC

Fixes: 531936b218d8 ("arm64: dts: imx8mp-venice-gw74xx: update to revB PCB")
Cc: stable@vger.kernel.org
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
index faa370a5885ff..34619f085623b 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
@@ -185,7 +185,7 @@
 		#address-cells = <0x1>;
 		#size-cells = <0x1>;
 		reg = <0x0>;
-		spi-max-frequency = <36000000>;
+		spi-max-frequency = <25000000>;
 	};
 };