[PATCH v3] arm64: dts: qcom: shikra: Enable dTPM on EVK boards

[Khalid Faisal Ansari]

The Shikra EVK boards (CQM, CQS, IQS) carry an ST33 discrete TPM
connected via SPI5. Enable the SPI controller and add the TPM node
with the ST33HTPM compatible and a 20 MHz max clock.

The TPM node is kept per-board as the dTPM hardware may not be present
on all future Shikra EVK variants.

This change requires SPI5 to be enabled in shikra-evk.dtsi [1].

[1] https://lore.kernel.org/all/20260820085347.822-1-xueyao.an@xxxxxxxxxxxxxxxx/

Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>
Signed-off-by: Khalid Faisal Ansari <khalid.ansari@xxxxxxxxxxxxxxxx>
---
The Shikra EVK boards (CQM, CQS, IQS) have an ST33 discrete TPM (dTPM)
connected over SPI5. Enable the SPI controller and add the TPM node for
all three board variants.

The TPM node is kept per-board as the dTPM hardware may not be present
on all future Shikra EVK variants. The SPI5 prerequisite is owned by a
separate team and cannot be bundled into this series [1].

[1] https://lore.kernel.org/all/20260820085347.822-1-xueyao.an@xxxxxxxxxxxxxxxx/
---
Changes in v3:
- Added Reviewed-by: Abel Vesa <abel.vesa@xxxxxxxxxxxxxxxx>
- Clarified per-board placement: dTPM may not be present on all future
  Shikra EVK variants; SPI5 prerequisite is from a separate team
- Link to v2: https://lore.kernel.org/r/20260820-shikra_dtpm-v2-1-bc6698564ed5@xxxxxxxxxxxxxxxx

Changes in v2:
- Dropped invalid Depends-on: tag; replaced with inline [1] reference
- Link to v1: https://lore.kernel.org/r/20260820-shikra_dtpm-v1-1-40d96b8238bb@xxxxxxxxxxxxxxxx
---
 arch/arm64/boot/dts/qcom/shikra-cqm-evk.dts | 10 ++++++++++
 arch/arm64/boot/dts/qcom/shikra-cqs-evk.dts | 10 ++++++++++
 arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts | 10 ++++++++++
 3 files changed, 30 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-evk.dts b/arch/arm64/boot/dts/qcom/shikra-cqm-evk.dts
index b112b21b1d79..32916e9df9d3 100644
--- a/arch/arm64/boot/dts/qcom/shikra-cqm-evk.dts
+++ b/arch/arm64/boot/dts/qcom/shikra-cqm-evk.dts
@@ -57,3 +57,13 @@ &sdhc_1 {
 
 	status = "okay";
 };
+
+&spi5 {
+	status = "okay";
+
+	tpm@0 {
+		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/shikra-cqs-evk.dts b/arch/arm64/boot/dts/qcom/shikra-cqs-evk.dts
index e62ba5aef71f..bacdc7c77c2f 100644
--- a/arch/arm64/boot/dts/qcom/shikra-cqs-evk.dts
+++ b/arch/arm64/boot/dts/qcom/shikra-cqs-evk.dts
@@ -57,3 +57,13 @@ &sdhc_1 {
 
 	status = "okay";
 };
+
+&spi5 {
+	status = "okay";
+
+	tpm@0 {
+		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};
diff --git a/arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts b/arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts
index 727809430fd1..b42f94708bfd 100644
--- a/arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts
+++ b/arch/arm64/boot/dts/qcom/shikra-iqs-evk.dts
@@ -57,3 +57,13 @@ &sdhc_1 {
 
 	status = "okay";
 };
+
+&spi5 {
+	status = "okay";
+
+	tpm@0 {
+		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};

---
base-commit: a4ff2be345d0abc943da8dd8da98151843b750dc
change-id: 20260820-shikra_dtpm-2bc494dd6756

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