linux-kernel - Re: [PATCH v6 5/5] arm64: dts: qcom: ipq5424: add support to get watchdog bootstatus from IMEM

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Message-ID: <20260203061148.zrusrpvkd5xiiaie@hu-mojha-hyd.qualcomm.com>
Date: Tue, 3 Feb 2026 11:41:48 +0530
From: Mukesh Ojha <mukesh.ojha@....qualcomm.com>
To: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Rajendra Nayak <quic_rjendra@...cinc.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v6 5/5] arm64: dts: qcom: ipq5424: add support to get
 watchdog bootstatus from IMEM

On Tue, Feb 03, 2026 at 10:05:26AM +0530, Kathiravan Thirumoorthy wrote:
> 
> On 2/2/2026 7:14 PM, Mukesh Ojha wrote:
> > On Sat, Jan 31, 2026 at 10:18:29AM +0200, Dmitry Baryshkov wrote:
> > > On Fri, Jan 30, 2026 at 04:14:34PM +0530, Kathiravan Thirumoorthy wrote:
> > > > Add the "sram" property to the watchdog device node to enable
> > > > retrieval of the system restart reason from IMEM, populated by XBL.
> > > > Parse this information in the watchdog driver and update the bootstatus
> > > > sysFS if the restart was triggered by a watchdog timeout.
> > > > 
> > > > Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@....qualcomm.com>
> > > > ---
> > > > Changes in v6:
> > > > 	- Update the 'sram' property to point to the SRAM region
> > > > Changes in v5:
> > > > 	- Rename the property 'qcom,imem' to 'sram'
> > > > Changes in v4:
> > > > 	- New patch
> > > > ---
> > > >   arch/arm64/boot/dts/qcom/ipq5424.dtsi | 5 +++++
> > > >   1 file changed, 5 insertions(+)
> > > > 
> > > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> > 
> > I have a few more cookies (stored in a fixed IMEM location supported
> > downstream) that I want to add, and they are available on all Qualcomm
> > mobile SoCs. Should it be added under SMEM now?
> 
> 
> Mukesh, you mean SMEM or SRAM? Do we have the consumers in upstream for all
> those cookies?

Forgive me,. yeah I meant SRAM. 

> 
> 
> > 
> > 
> > > 
> > > -- 
> > > With best wishes
> > > Dmitry

-- 
-Mukesh Ojha