From: Stefano Radaelli <stefano.r@variscite.com>
Date: Thu, 19 Mar 2026 18:40:29 +0000 (+0100)
Subject: arm64: dts: imx8mm-var-som-symphony: Add TPM2 support
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9681db803b0544c66eacc062ac29cc80b27c0fd0;p=thirdparty%2Fkernel%2Fstable.git

arm64: dts: imx8mm-var-som-symphony: Add TPM2 support

Add support for the TPM2 device on the VAR-SOM Symphony carrier board.

The ST33K TPM2 is connected over I2C, and A PCA6408 GPIO expander is
used to control the reset signal required to release the TPM from reset.

Add the PCA6408 GPIO expander and the ST33K TPM2 device node.

Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>
---

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
index 6da29845985f..6112e4392c59 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts
@@ -153,6 +153,20 @@
 };
 
 &i2c3 {
+	pca6408: gpio@21 {
+		compatible = "nxp,pcal6408";
+		reg = <0x21>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	st33ktpm2xi2c: tpm@2e {
+		compatible = "st,st33ktpm2xi2c", "tcg,tpm-tis-i2c";
+		reg = <0x2e>;
+		label = "tpm";
+		reset-gpios = <&pca6408 4 GPIO_ACTIVE_LOW>;
+	};
+
 	/* Capacitive touch controller */
 	ft5x06_ts: touchscreen@38 {
 		compatible = "edt,edt-ft5406";