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[103.229.18.19]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3057cb5a823sm10480846a91.34.2025.04.08.01.50.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Apr 2025 01:50:15 -0700 (PDT) From: Kathiravan Thirumoorthy Date: Tue, 08 Apr 2025 14:19:54 +0530 Subject: [PATCH RFC 4/6] dt-bindings: sram: qcom,imem: add the support for restart reason Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250408-wdt_reset_reason-v1-4-e6ec30c2c926@oss.qualcomm.com> References: <20250408-wdt_reset_reason-v1-0-e6ec30c2c926@oss.qualcomm.com> In-Reply-To: <20250408-wdt_reset_reason-v1-0-e6ec30c2c926@oss.qualcomm.com> To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , Wim Van Sebroeck , Guenter Roeck Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org, Kathiravan Thirumoorthy X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1744102197; l=1707; i=kathiravan.thirumoorthy@oss.qualcomm.com; s=20230906; h=from:subject:message-id; bh=+M5Ku3V/2ZgH8reYRD4cDg46YM3sTBrM/dc+pGgazj4=; b=FDnKNdyAhSoRBqI4r5xDjLdWczl6jHsBMpfCkPV/dGjynr4a4W1v5xAy5BoD9anGt18rCAg4r Z0FE9BbQvmtDg6Q+5WXUChdkUj4EHsEPjtURnUyPm3CnSpw9jH3V7QE X-Developer-Key: i=kathiravan.thirumoorthy@oss.qualcomm.com; a=ed25519; pk=xWsR7pL6ch+vdZ9MoFGEaP61JUaRf0XaZYWztbQsIiM= X-Authority-Analysis: v=2.4 cv=B5+50PtM c=1 sm=1 tr=0 ts=67f4e349 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=Ou0eQOY4+eZoSc0qltEV5Q==:17 a=IkcTkHD0fZMA:10 a=XR8D0OoHHMoA:10 a=EUspDBNiAAAA:8 a=her2qdqp2_xUa3hfgHoA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-GUID: D6P0CNZ1lmdrgNKZdLGm8Wy_AYMpD7p3 X-Proofpoint-ORIG-GUID: D6P0CNZ1lmdrgNKZdLGm8Wy_AYMpD7p3 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-08_03,2025-04-07_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 suspectscore=0 malwarescore=0 bulkscore=0 phishscore=0 spamscore=0 priorityscore=1501 adultscore=0 impostorscore=0 lowpriorityscore=0 mlxscore=0 clxscore=1015 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504080062 In the Qualcomm IPQ SoCs, system restart reason is captured in the IMEM location by bootloaders and Linux populates this information to the userspace. Add a child node for the restart reason in the IMEM region. Signed-off-by: Kathiravan Thirumoorthy --- .../devicetree/bindings/sram/qcom,imem.yaml | 24 ++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/Documentation/devicetree/bindings/sram/qcom,imem.yaml b/Documentation/devicetree/bindings/sram/qcom,imem.yaml index dec1b1ee924cf1386f559eb262ea864f2788c165..c3dab5fbc88c1515bfb3585f18aed9e01ae36fe4 100644 --- a/Documentation/devicetree/bindings/sram/qcom,imem.yaml +++ b/Documentation/devicetree/bindings/sram/qcom,imem.yaml @@ -56,6 +56,10 @@ patternProperties: $ref: /schemas/remoteproc/qcom,pil-info.yaml# description: Peripheral image loader relocation region + "^restart-reason@[0-9a-f]+$": + $ref: /schemas/watchdog/qcom,restart-reason.yaml# + description: IPQ SoC restart reason region + required: - compatible - reg @@ -82,3 +86,23 @@ examples: }; }; }; + + - | + soc { + #address-cells = <2>; + #size-cells = <2>; + + sram@8600000 { + compatible = "qcom,ipq5424-imem", "syscon", "simple-mfd"; + reg = <0 0x08600000 0 0x1000>; + ranges = <0 0 0x08600000 0x1000>; + + #address-cells = <1>; + #size-cells = <1>; + + restart-reason@7b0 { + compatible = "qcom,restart-reason-info"; + reg = <0x7b0 0x4>; + }; + }; + }; -- 2.34.1