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[93.35.179.236]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48527681a3esm261097785e9.4.2026.03.07.07.55.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 07 Mar 2026 07:55:20 -0800 (PST) From: Stefano Radaelli To: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: pierluigi.p@variscite.com, Stefano Radaelli , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Li , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam Subject: [PATCH v3 09/11] arm64: dts: imx8mm-var-som-symphony: Add TPM2 support Date: Sat, 7 Mar 2026 16:54:45 +0100 Message-ID: <72e21074031d16153460e128f8f37b8c942aaf30.1772898346.git.stefano.radaelli21@gmail.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: quoted-printable Content-Type: text/plain; charset="utf-8" From: Stefano Radaelli 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. This patch adds: - The PCA6408 GPIO expander. - The ST33K TPM2 device node. Signed-off-by: Stefano Radaelli --- v2->v3: -=20 v1->v2: -=20 .../boot/dts/freescale/imx8mm-var-som-symphony.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts b/ar= ch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts index 66c306f755af..a77085b264e5 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts +++ b/arch/arm64/boot/dts/freescale/imx8mm-var-som-symphony.dts @@ -160,6 +160,20 @@ typec1_dr_sw: endpoint { }; =20 &i2c3 { + pca6408: gpio@21 { + compatible =3D "nxp,pcal6408"; + reg =3D <0x21>; + gpio-controller; + #gpio-cells =3D <2>; + }; + + st33ktpm2xi2c: tpm@2e { + compatible =3D "st,st33ktpm2xi2c", "tcg,tpm-tis-i2c"; + reg =3D <0x2e>; + label =3D "tpm"; + reset-gpios =3D <&pca6408 4 GPIO_ACTIVE_LOW>; + }; + /* Capacitive touch controller */ ft5x06_ts: touchscreen@38 { compatible =3D "edt,edt-ft5406"; --=20 2.47.3