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Tue, 30 Jun 2026 07:53:26 -0700 (PDT) Received: from juillet.box.freepro.com ([2a05:6e02:1041:c10:5c75:21f9:a642:c358]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-493be4d15ddsm720295e9.6.2026.06.30.07.53.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 30 Jun 2026 07:53:24 -0700 (PDT) From: Daniel Lezcano To: sre@kernel.org, hansg@kernel.org, ilpo.jarvinen@linux.intel.com, linux@roeck-us.net, andersson@kernel.org, konradybcio@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: bryan.odonoghue@linaro.org, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hwmon@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org Subject: [PATCH v2 0/3] Lenovo ThinkPad T14s EC thermal monitoring and thermal zone integration Date: Tue, 30 Jun 2026 16:53:04 +0200 Message-ID: <20260630145307.10745-1-daniel.lezcano@oss.qualcomm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDE0MCBTYWx0ZWRfX+d48vykbC12W 8k0YW+j21G0wxnmlNozNygZhiDUn16G3jPfgrH9le3xy9l4isFrf0pMJD61u0digKzbVSNN4Xcl KyC1HaVdMSH+YCsyAeFfa+M2QhDdcTq8rJxyREHpJX58Q+OR/3Wq5TLai1j7HnMMOd43wpq04jB U37RPc6lkWG90XJp5lbT5wpqja4tfhCzxpJfQcAFccMrBmWdLbD9tlLLYZuXB9Uk9bsFuNXTzRJ fv07mPXZrCBTYbxz9cz58XdZXkeEe9T+O+YiTEiSWkvBu3JiN79+Pk7E+TiU86KQaduzWunrJUP MjdnkZNaNXiO93IfTBocT06xyH3/vE4zKSgdAB0GTTBcU+ysXR+jEMo2XpGLOCrhcRvRHC8UqxW XwABhnILwlw25AJ9feA7Z2pNDBuG63IXw3BXc2DDtFfv/B0ELUfWiQGMr2w8bTRngFOgWL1kLPV CO2ISSXWrrfJp4tgjGw== X-Proofpoint-GUID: OdvjOLjYYOt8-cQZnlRrEeIfa1pyE20l X-Proofpoint-ORIG-GUID: OdvjOLjYYOt8-cQZnlRrEeIfa1pyE20l X-Authority-Analysis: v=2.4 cv=Ivkutr/g c=1 sm=1 tr=0 ts=6a43d867 cx=c_pps a=UgVkIMxJMSkC9lv97toC5g==:117 a=xqWC_Br6kY4A:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=BPc3F_TA1yA0jLc9_u4A:9 a=1HOtulTD9v-eNWfpl4qZ:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDE0MCBTYWx0ZWRfX+joGuh2Au8un ZNd238b0Aqy418QA/EERJdu4Q3G8H+2N64dhZqW2hHVRzgwKYXTMjfuUMycTa00MXMqDcxu7khl ad6fOU9EFSQBOZ5nz41pq4wo2Ji6dBc= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-30_04,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 malwarescore=0 bulkscore=0 adultscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606300140 Hi, This series extends the Lenovo ThinkPad T14s embedded controller driver with environmental monitoring capabilities and integrates the exposed sensors into the Linux thermal framework. The EC provides access to several platform temperature sensors covering the SoC, keyboard area, bottom cover, charging circuitry, QTM module and SSD. These sensors are currently used by the firmware for thermal management but are not exposed to Linux. The first patch adds hwmon support for the EC temperature sensors. The second patch wires EC thermal notifications into the hwmon event framework, allowing userspace to receive alarm notifications when the EC reports thermal zone state changes. The last patch exposes the EC as a thermal sensor provider in the device tree and defines thermal zones for the keyboard skin temperature and the charging circuitry temperature. This allows the generic thermal framework to react to EC-reported temperatures and apply standard Linux thermal mitigation policies. This series fixes critical thermal issues happening on this platform where a kernel compilation, or heavy workloads, lead to a system reboot. Tested on a Lenovo ThinkPad T14s Gen 6 (Snapdragon X Elite). Thanks, Daniel --- Changelog: v2: - Fixed patch 1 subject prefix - Removed the fan information part - Added HWMON_T_ALARM - Fixed DT change description to reflect what it does really Daniel Lezcano (3): platform: arm64:: lenovo-t14s-ec: Add hwmon support for temperatures platform: arm64: thinkpad-t14s-ec: Wire EC thermal events to hwmon arm64: dts: qcom: x1e78100-t14s: Add thermal zones for keyboard skin and charging sensors .../qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 68 ++++++- drivers/platform/arm64/lenovo-thinkpad-t14s.c | 174 +++++++++++++++++- 2 files changed, 236 insertions(+), 6 deletions(-) -- 2.53.0