Re: [PATCH V4 1/2] dt-bindings: mailbox: Document qcom,ipq5424-tmel

[Dmitry Baryshkov]

On 01/04/2025 14:26, Sricharan Ramabadhran wrote:
> [Resending, since my previous response had some wrapping issue]
>
> > > TMEL(Trust Management Engine Lite) subsystem provides different kinds of
> >
> > Trust whatever SubSystem (TMEL SS) ...
> >
> > different to what?
>
>
> To the ARM TrustZone firmware(TZ). So these services (secureboot,
> authentication etc) were provided by the TZ in some SOCs. Here,
> TMEL provides those. Can add those details here.

Yes, please (and all other answers too).

> > > services like secureboot, remote image authentication, key management,
> > > crypto, OEM provisioning etc.
> > >
> > > The QMP mailbox is the primary means of communication between TMEL SS 
> > > and
> >
> > What is QMP?
> Qualcomm Messaging Protocol
>
> > > other subsystem on the SoC. A dedicated pair of inbound and outbound
> > > mailboxes is implemented for each subsystem/external execution 
> > > environment
> >
> > Is it implemented in the driver? Is it provided by the hardware? By the
> > firmware?
> TMEL firmware provides and processes the inbound requests and responds
> back on the outbound channel. Can mention this explicitly in the above.
>
> Regards,
>   Sricharan


--
With best wishes
Dmitry