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[93.144.65.248]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-493c6375764sm314379715e9.5.2026.07.06.02.35.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 02:35:01 -0700 (PDT) From: Stefano Radaelli X-Google-Original-From: Stefano Radaelli To: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: pierluigi.p@variscite.com, Stefano Radaelli , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rob Herring , Krzysztof Kozlowski , Conor Dooley Subject: [PATCH v2 10/15] arm64: dts: imx8mn-var-som-symphony: Add TPM2 support Date: Mon, 6 Jul 2026 11:34:40 +0200 Message-ID: <7cd17d03fa70ee1f5fd5986fbb0e8a39ad7b4fbe.1783330236.git.stefano.r@variscite.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Stefano Radaelli 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 --- v1->v2: - .../boot/dts/freescale/imx8mn-var-som-symphony.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts index 53130b521b5b..7d016ed5e911 100644 --- a/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts +++ b/arch/arm64/boot/dts/freescale/imx8mn-var-som-symphony.dts @@ -160,6 +160,20 @@ typec1_dr_sw: endpoint { }; &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"; -- 2.47.3