Re: [PATCH v5 11/11] arm64: dts: qcom: shikra: Add gpio-reserved-ranges to tlmm

[Komal Bajaj <komal.bajaj@oss.qualcomm.com>]

On 7/2/2026 4:25 PM, Konrad Dybcio wrote:
> On 7/2/26 11:50 AM, Komal Bajaj wrote:
>> Add gpio-reserved-ranges property to the tlmm node for all three
>> Shikra EVK variants (CQM, CQS, IQS) to mark GPIOs used by the
>> SoC internally and not available for general use.
> These are generally added to prevent non-secure access upon TLMM
> probe, i.e. the board won't boot if some of them are not protected.
>
> I assume the proposed set contains both ones that are _absolutely
> forbidden_ for Linux to touch, but also ones that are dedicated to
> some specific purpose that Linux _shouldn't_ touch.

Yes, some GPIOs are reserved for secure-world use and are therefore not 
accessible from the non-secure world.
I will update the commit message accordingly.

>
> Please add comments, like in glymur-crd.dtsi:
>
>          gpio-reserved-ranges = <4 4>, /* EC TZ Secure I3C */
>                                 <10 2>, /* OOB UART */
>                                 <44 4>; /* Security SPI (TPM) */
>
> explaining what these pins are.

Sure, will add this info.

Thanks
Komal

>
> If any of them are boot-critical, squash this into the introductory
> change
>
> Konrad