From: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
To: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>,
Rajendra Nayak <quic_rjendra@quicinc.com>
Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org,
Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>,
Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Subject: Re: [PATCH v9 0/5] Add support to read the watchdog bootstatus from IMEM
Date: Mon, 30 Mar 2026 21:37:11 +0530 [thread overview]
Message-ID: <46643da6-3bb5-4c67-afd5-9a9d9027ab85@oss.qualcomm.com> (raw)
In-Reply-To: <7593d19b-c124-48fb-9c0f-af8177dab1ac@oss.qualcomm.com>
On 3/16/2026 2:36 PM, Kathiravan Thirumoorthy wrote:
>
> On 2/28/2026 5:58 PM, Kathiravan Thirumoorthy wrote:
>> In Qualcomm IPQ SoCs, if the system is rebooted due to the watchdog
>> timeout, there is no way to identify it. Current approach of checking
>> the EXPIRED_STATUS in WDT_STS is not working.
>>
>> To achieve this, if the system is rebooted due to watchdog timeout, the
>> information is captured in the IMEM by the bootloader (along with other
>> reason codes as well).
>>
>> This series attempts to address this by adding the support to read the
>> IMEM and populate the information via bootstatus sysfs file.
>>
>> With the CONFIG_WATCHDOG_SYSFS enabled, user can extract the information
>> as below:
>>
>> cat
>> /sys/devices/platform/soc@0/f410000.watchdog/watchdog/watchdog0/bootstatus
>>
>> 32
>>
>> Signed-off-by: Kathiravan Thirumoorthy
>> <kathiravan.thirumoorthy@oss.qualcomm.com>
>
> Gentle Reminder on this series. If there are no further comments, can
> this be picked up for v7.1?
Bjorn, Guenter, Wim — gentle ping. FWIW, this series applies cleanly to
the next-20260327 tag. Please let me know if any improvements are required.
prev parent reply other threads:[~2026-03-30 16:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-28 12:28 [PATCH v9 0/5] Add support to read the watchdog bootstatus from IMEM Kathiravan Thirumoorthy
2026-02-28 12:29 ` [PATCH v9 1/5] dt-bindings: sram: describe the IPQ5424 IMEM as mmio-sram Kathiravan Thirumoorthy
2026-02-28 12:29 ` [PATCH v9 2/5] arm64: dts: qcom: ipq5424: Add the IMEM node Kathiravan Thirumoorthy
2026-02-28 12:29 ` [PATCH v9 3/5] dt-bindings: watchdog: qcom-wdt: Document sram property Kathiravan Thirumoorthy
2026-02-28 12:29 ` [PATCH v9 4/5] watchdog: qcom: add support to get the bootstatus from IMEM Kathiravan Thirumoorthy
2026-02-28 12:29 ` [PATCH v9 5/5] arm64: dts: qcom: ipq5424: add support to get watchdog " Kathiravan Thirumoorthy
2026-03-16 9:06 ` [PATCH v9 0/5] Add support to read the " Kathiravan Thirumoorthy
2026-03-30 16:07 ` Kathiravan Thirumoorthy [this message]
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