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[188.152.100.94]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-486f8b1fe65sm77289195e9.5.2026.03.19.11.41.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 19 Mar 2026 11:41:58 -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 v4 09/11] arm64: dts: imx8mm-var-som-symphony: Add TPM2 support Date: Thu, 19 Mar 2026 19:40:29 +0100 Message-ID: <570b16455e37e7ce4d2556ed4e21d67ac3a27183.1773944896.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: quoted-printable Content-Type: text/plain; charset="utf-8" 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 --- v3->v4: -=20 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 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 @@ 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