linux-kernel - [PATCH v3] arm64: dts: qcom: hamoa-iot-evk: Enable TPM (ST33) on SPI11

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Message-Id: <20251112-arm64-dts-qcom-hamoa-iot-evk-enable-st33-tpm-on-spi11-v3-1-39b19eb55cc3@oss.qualcomm.com>
Date: Wed, 12 Nov 2025 13:12:09 +0530
From: Khalid Faisal Ansari <khalid.ansari@....qualcomm.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Khalid Faisal Ansari <khalid.ansari@....qualcomm.com>
Subject: [PATCH v3] arm64: dts: qcom: hamoa-iot-evk: Enable TPM (ST33) on
 SPI11

Enable ST33HTPM TPM over SPI11 on the Hamoa IoT EVK by adding the
required SPI and TPM nodes.

Signed-off-by: Khalid Faisal Ansari <khalid.ansari@....qualcomm.com>
---
Testing:
- TPM detected via tpm_tis_spi
- Verified functionality using tpm2-tools (e.g. tpm2_getrandom, tpm2_rsadecrypt)

Depends on:
- <20251106102448.3585332-1-xueyao.an@....qualcomm.com>
  Link: https://lore.kernel.org/linux-arm-msm/20251106102448.3585332-1-xueyao.an@oss.qualcomm.com/
---
Changes in v3:
- Squashed patches touching the same file into one.
- Link to v2: https://lore.kernel.org/r/20251111-arm64-dts-qcom-hamoa-iot-evk-enable-st33-tpm-on-spi11-v2-0-101a801974b6@oss.qualcomm.com

Changes in v2:
- Use "tcg,tpm_tis-spi" compatible to satisfy dtbs_check (was vendor-only).
- Add dependency change in cover letter.
- Link to v1: https://lore.kernel.org/r/20251107-arm64-dts-qcom-hamoa-iot-evk-enable-st33-tpm-on-spi11-v1-1-8ba83b58fca7@oss.qualcomm.com
---
 arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
index 36dd6599402b..aecaebebcef5 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-iot-evk.dts
@@ -917,6 +917,16 @@ &smb2360_2_eusb2_repeater {
 	vdd3-supply = <&vreg_l8b_3p0>;
 };
 
+&spi11 {
+	status = "okay";
+
+	tpm@0 {
+		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};
+
 &swr0 {
 	status = "okay";
 

---
base-commit: 9c0826a5d9aa4d52206dd89976858457a2a8a7ed
change-id: 20251107-arm64-dts-qcom-hamoa-iot-evk-enable-st33-tpm-on-spi11-c8353d7fe82e

Best regards,
-- 
Khalid Faisal Ansari <khalid.ansari@....qualcomm.com>