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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-59e38830f3fsm638381e87.99.2026.02.04.04.39.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 04 Feb 2026 04:39:46 -0800 (PST) Message-ID: Date: Wed, 4 Feb 2026 13:39:43 +0100 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 5/5] arm64: dts: qcom: ipq5424: add support to get watchdog bootstatus from IMEM To: Mukesh Ojha , Dmitry Baryshkov Cc: Kathiravan Thirumoorthy , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Wim Van Sebroeck , Guenter Roeck , Rajendra Nayak , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org References: <20260130-wdt_reset_reason-v6-0-417ab789cd97@oss.qualcomm.com> <20260130-wdt_reset_reason-v6-5-417ab789cd97@oss.qualcomm.com> <5zqxloovexknbuhknbafc2trf66d6zwtvtkhjbchmbndxg2j6u@3giwqjkd2vl7> <20260202134402.ochfxv3lnju3dioa@hu-mojha-hyd.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <20260202134402.ochfxv3lnju3dioa@hu-mojha-hyd.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=StqdKfO0 c=1 sm=1 tr=0 ts=69833e14 cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=HzLeVaNsDn8A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=EghoVO_b5IT1oYOY15sA:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 X-Proofpoint-GUID: BbwUo9YDgIrqk28D-sSmbVn36zZx46J3 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjA0MDA5NiBTYWx0ZWRfXweoBx7eRbOeq BiC0xcPoXkMYJ8hTy6iQdMWeTAZF0uPMNHVzUcmtfHqaVwVDVb1LoMIapWUwoCi/mE61el0MG2c xhEzkwKeb2RiaCMlR87FJ5wxPJAcy6tzD49Znh3BXLyznWwcjmnm0IHR91zdQZs3MUkmDgNyCS3 sryWX9SPtu2k4ygxy+P4SEJt2sXHJozJMMC7+lKXaWxMYUVoR29ysbwD0bLbaEXloU0Jyp0I7Je QfqDwvWGPjKOjVrXgB+UM7yWHVVK5xrSvU0Q5r38yaTVhnyhPmfhxS5gvERmLwFKIA8QwRiWaoG 6+/BI7voI07g+w0JOgFF7qewrd1DRcFqW7fLh+GSEbAX5JXQnhl5D2u1bo7d3QfNvnxsxbofn3V KhrojzYmgSSYWrtLaQcKQJtd6TLJO5SaYRzMWNbljo34C0baoo6ipxzHX2TbPxpAqZvFVPHYZVB wVct/ysLyxAIFeEhMyw== X-Proofpoint-ORIG-GUID: BbwUo9YDgIrqk28D-sSmbVn36zZx46J3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-02-04_04,2026-02-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 suspectscore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 malwarescore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2601150000 definitions=main-2602040096 On 2/2/26 2:44 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 >>> --- >>> 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 > > > 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? FWIW currently they won't be probed (if you wanted to give them a compatible string and bind a driver based on that), since drivers/misc/sram.c lacks an of_platform_populate(), but that's trivial to change I think getting agreement on dt-bindings may be the tougher part.. Are the cookies you want to use attached to any other part of the hardware (e.g. in case of pil-info it's directly connected to the rprocs), or are they general debug information? Konrad