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

[Sricharan Ramabadhran]

On 3/28/2025 6:21 PM, Dmitry Baryshkov wrote:
> On Thu, Mar 27, 2025 at 11:47:49PM +0530, Sricharan R wrote:
> > From: Sricharan Ramabadhran <quic_srichara@xxxxxxxxxxx>
> >
> > 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, image
authentication etc) were provided by the TZ in some SOCs. Here, TMEL
provides those. Can add those details here.

> > 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