Re: [PATCH v3 01/18] dt-bindings: firmware: qcom,scm: Add minidump SRAM property

[Mukesh Ojha]

On Sat, May 30, 2026 at 10:24:08AM +0200, Krzysztof Kozlowski wrote:
> On Sat, May 23, 2026 at 01:19:52AM +0530, Mukesh Ojha wrote:
> > On most Qualcomm SoCs where minidump is supported, a word in always-on
> > SRAM is shared between the kernel and boot firmware. Before DDR is
> > initialised on the warm reset following a crash, firmware reads this
> > word to decide if minidump is enabled and collect a minidump and where
> >  to deliver it (USB upload to a host, or save to local storage).
> > 
> > Add a 'sram' property to the SCM binding to describe a region in
> > always-on SRAM where the minidump download destination value could be
> > written. Boot firmware reads it before DDR is initialised on a warm
> > reset to decide where to store the minidump either to host PC or to
> > on device storage.
> 
> You described how firmware is using it, but we do not run the firmware
> here. From this entire description we don't need it in DTS, because this
> is not a DTS for firmware.

Ah ! I missed to add that this region could be changed by the OS and
firmware could take different route based on it.

> 
> Best regards,
> Krzysztof
> 

-- 
-Mukesh Ojha