From: Tim Harvey <tharvey@gateworks.com>
To: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
linux-stable@vger.kernel.org
Cc: imx@lists.linux.dev, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
Tim Harvey <tharvey@gateworks.com>
Subject: [PATCH 4/4] arm64: dts: imx8mp-venice-gw74xx: fix TPM SPI frequency
Date: Fri, 23 May 2025 10:37:23 -0700 [thread overview]
Message-ID: <20250523173723.4167474-4-tharvey@gateworks.com> (raw)
In-Reply-To: <20250523173723.4167474-1-tharvey@gateworks.com>
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.
Fixes: 531936b218d8 ("arm64: dts: imx8mp-venice-gw74xx: update to revB PCB")
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
---
arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
index f00099f0cd4e..12de7cf1e853 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-venice-gw74xx.dts
@@ -201,7 +201,7 @@ &ecspi1 {
tpm@0 {
compatible = "atmel,attpm20p", "tcg,tpm_tis-spi";
reg = <0x0>;
- spi-max-frequency = <36000000>;
+ spi-max-frequency = <25000000>;
};
};
--
2.25.1
next prev parent reply other threads:[~2025-05-23 17:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-23 17:37 [PATCH 1/4] arm64: dts: imx8mp-venice-gw71xx: fix TPM SPI frequency Tim Harvey
2025-05-23 17:37 ` [PATCH 2/4] arm64: dts: imx8mp-venice-gw72xx: " Tim Harvey
2025-05-23 17:37 ` [PATCH 3/4] arm64: dts: imx8mp-venice-gw73xx: " Tim Harvey
2025-05-23 17:37 ` Tim Harvey [this message]
2025-06-19 7:49 ` [PATCH 1/4] arm64: dts: imx8mp-venice-gw71xx: " Shawn Guo
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