[PATCH v4 0/2] arm64: dts: qcom: shikra: enable ST33 TPM support

[PATCH v4 0/2] arm64: dts: qcom: shikra: enable ST33 TPM support

[Khalid Faisal Ansari]

The Shikra EVK platforms support an ST33 TPM connected over SPI5.

This series first removes GPIOs 14-17 from the reserved ranges so 
that SPI5 can be used by Linux, and then enables the ST33 TPM in
the common Shikra EVK device tree.

Changes in v4:
  - Send the interdependent GPIO and TPM changes together.
  - Add the SPI5 and TPM nodes to shikra-evk.dtsi.
  - Remove GPIOs 14-17 from the reserved ranges.

Link to v3: https://lore.kernel.org/all/20260820-shikra_dtpm-v3-1-93cdd4f3e8dc@oss.qualcomm.com/

Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
---
Khalid Faisal Ansari (2):
      arm64: dts: qcom: shikra: unreserve GPIOs 14-17
      arm64: dts: qcom: shikra: enable ST33 TPM

 arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi |  1 -
 arch/arm64/boot/dts/qcom/shikra-evk.dtsi     | 10 ++++++++++
 arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi |  1 -
 3 files changed, 10 insertions(+), 2 deletions(-)
---
base-commit: 65eb47183e176d8c1220cb945edac71dbedceac1
change-id: 20260825-shikra-dtpm-7490cacf0266

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

[PATCH v4 1/2] arm64: dts: qcom: shikra: unreserve GPIOs 14-17

[Khalid Faisal Ansari]

GPIOs 14-17 were previously reserved in the tlmm gpio-reserved-ranges,
preventing Linux from accessing SPI5. Removing them from the reserved
list across all three Shikra EVK variants (CQM, CQS, IQS) enables it
for dTPM usecase.

Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi | 1 -
 arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi | 1 -
 2 files changed, 2 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
index 8ac42ff625a0..fde7fc035bf5 100644
--- a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
@@ -197,7 +197,6 @@ pm4125_l22: l22 {
 
 &tlmm {
 	gpio-reserved-ranges = <6 4>, /* Fingerprint SPI */
-			       <14 4>, /* eSE SPI */
 			       <30 2>, /* NFC SPI */
 			       <138 1>, /* NFC Secure IO */
 			       <155 11>; /* eMMC Boot */
diff --git a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
index 4ff97945274d..e119ace54e58 100644
--- a/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi
@@ -219,7 +219,6 @@ pm8150_l18: l18 {
 
 &tlmm {
 	 gpio-reserved-ranges = <6 4>, /* Fingerprint SPI */
-			       <14 4>, /* eSE SPI */
 			       <30 2>, /* NFC SPI */
 			       <138 1>, /* NFC Secure IO */
 			       <155 11>; /* eMMC Boot */

-- 
2.34.1

[PATCH v4 2/2] arm64: dts: qcom: shikra: enable ST33 TPM

[Khalid Faisal Ansari]

Enable ST33HTPM TPM over SPI5 on the Shikra IoT EVK by adding the
required SPI and TPM nodes.

Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/shikra-evk.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
index 6eb4184f7642..9f3a880e95e6 100644
--- a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
+++ b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
@@ -12,3 +12,13 @@ &qupv3_0 {
 &uart0 {
 	status = "okay";
 };
+
+&spi5 {
+	status = "okay";
+
+	tpm@0 {
+		compatible = "st,st33htpm-spi", "tcg,tpm_tis-spi";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+	};
+};

-- 
2.34.1

Re: [PATCH v4 1/2] arm64: dts: qcom: shikra: unreserve GPIOs 14-17

[Konrad Dybcio]

On 8/25/26 9:13 PM, Khalid Faisal Ansari wrote:
> GPIOs 14-17 were previously reserved in the tlmm gpio-reserved-ranges,
> preventing Linux from accessing SPI5. Removing them from the reserved
> list across all three Shikra EVK variants (CQM, CQS, IQS) enables it
> for dTPM usecase.
> 
> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad

Re: [PATCH v4 1/2] arm64: dts: qcom: shikra: unreserve GPIOs 14-17

[Konrad Dybcio]

On 8/25/26 9:13 PM, Khalid Faisal Ansari wrote:
> GPIOs 14-17 were previously reserved in the tlmm gpio-reserved-ranges,
> preventing Linux from accessing SPI5. Removing them from the reserved
> list across all three Shikra EVK variants (CQM, CQS, IQS) enables it
> for dTPM usecase.
> 
> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi | 1 -
>  arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi | 1 -
>  2 files changed, 2 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
> index 8ac42ff625a0..fde7fc035bf5 100644
> --- a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
> +++ b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
> @@ -197,7 +197,6 @@ pm4125_l22: l22 {
>  
>  &tlmm {
>  	gpio-reserved-ranges = <6 4>, /* Fingerprint SPI */
> -			       <14 4>, /* eSE SPI */

Is this bus going to be concurrently accessed by TZ?

Konrad

Re: [PATCH v4 2/2] arm64: dts: qcom: shikra: enable ST33 TPM

[Konrad Dybcio]

On 8/25/26 9:13 PM, Khalid Faisal Ansari wrote:
> Enable ST33HTPM TPM over SPI5 on the Shikra IoT EVK by adding the
> required SPI and TPM nodes.
> 
> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/shikra-evk.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
> index 6eb4184f7642..9f3a880e95e6 100644
> --- a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
> +++ b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
> @@ -12,3 +12,13 @@ &qupv3_0 {
>  &uart0 {
>  	status = "okay";
>  };
> +
> +&spi5 {

Please keep the alphabetical order of node references

Konrad

Re: [PATCH v4 1/2] arm64: dts: qcom: shikra: unreserve GPIOs 14-17

[Khalid Faisal Ansari]

On 8/26/2026 2:41 PM, Konrad Dybcio wrote:
> On 8/25/26 9:13 PM, Khalid Faisal Ansari wrote:
>> GPIOs 14-17 were previously reserved in the tlmm gpio-reserved-ranges,
>> preventing Linux from accessing SPI5. Removing them from the reserved
>> list across all three Shikra EVK variants (CQM, CQS, IQS) enables it
>> for dTPM usecase.
>>
>> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi | 1 -
>>   arch/arm64/boot/dts/qcom/shikra-iqs-som.dtsi | 1 -
>>   2 files changed, 2 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
>> index 8ac42ff625a0..fde7fc035bf5 100644
>> --- a/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/shikra-cqm-som.dtsi
>> @@ -197,7 +197,6 @@ pm4125_l22: l22 {
>>   
>>   &tlmm {
>>   	gpio-reserved-ranges = <6 4>, /* Fingerprint SPI */
>> -			       <14 4>, /* eSE SPI */
> Is this bus going to be concurrently accessed by TZ?
No.
>
> Konrad

Re: [PATCH v4 2/2] arm64: dts: qcom: shikra: enable ST33 TPM

[Khalid Faisal Ansari]

On 8/26/2026 2:41 PM, Konrad Dybcio wrote:
> On 8/25/26 9:13 PM, Khalid Faisal Ansari wrote:
>> Enable ST33HTPM TPM over SPI5 on the Shikra IoT EVK by adding the
>> required SPI and TPM nodes.
>>
>> Signed-off-by: Khalid Faisal Ansari <khalid.ansari@oss.qualcomm.com>
>> ---
>>   arch/arm64/boot/dts/qcom/shikra-evk.dtsi | 10 ++++++++++
>>   1 file changed, 10 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
>> index 6eb4184f7642..9f3a880e95e6 100644
>> --- a/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
>> +++ b/arch/arm64/boot/dts/qcom/shikra-evk.dtsi
>> @@ -12,3 +12,13 @@ &qupv3_0 {
>>   &uart0 {
>>   	status = "okay";
>>   };
>> +
>> +&spi5 {
> Please keep the alphabetical order of node references

Noted. This will be corrected in an upcoming patch.

>
> Konrad