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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: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwNjMwMDE0MCBTYWx0ZWRfX+dkG+rZpEhva RDGuMhAWLJEUoX150SEEv2CrJi4GR/n3mQE8Pr7fZGFQ+SafAB+3T1BuBJTicWUvAlBxCxjmXqg qQWaJ7K9f8p1/mPx2SE+XF/NjZPoKug= X-Authority-Analysis: v=2.4 cv=KfDidwYD c=1 sm=1 tr=0 ts=6a43d867 cx=c_pps a=hnmNkyzTK/kJ09Xio7VxxA==:117 a=xqWC_Br6kY4A:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=BPc3F_TA1yA0jLc9_u4A:9 a=PEH46H7Ffwr30OY-TuGO:22 X-Proofpoint-GUID: uQlq9CrLubBVoTqy9SM9-ReaKe6e0jNK X-Proofpoint-ORIG-GUID: uQlq9CrLubBVoTqy9SM9-ReaKe6e0jNK X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjMwMDE0MCBTYWx0ZWRfX2LIvfvLC5FkF PfB1mimvqIyqHk9nhYbExyzjMOwJJ2219nxLy49+Nvuiv8PWsUW5Wz5+LWt450rr4EJr6/khrAl QHRPFJKpgyMMHR/MsznCNXvePqu+ddtHyNOcXavmIyjNfpxNpvGS66a3sZzriFN8fBRoCbAAVMM Zx1FA05B9HNihLqh/vO3Hacdpd+GJfUcN//giyQxtRkTEjsgR4/4YdHSjZrz8TcCz024WJnCOke 3ld1snGiKjd4uzUEUJEU34D57wNZ09HAsF3ABdNfXg0YpkoVOI+Iu/gt6FIdGFcxw3oxt34Iz36 HzBLEGNvXfa1xBrudV8RgLEOl9RzBzz3rc8RNjxJkR3VBccGNyZGj/wTYu9BqEP+FqiQ0quFwqT ww0IzwziGqReaOOZy6zabGXUsVMmCetqFVbDimjgU7DFWNe1hTvJjoR5vUqXCphl0x7ruTE2MLt x0maquKia2RRryfqp/Q== 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 suspectscore=0 phishscore=0 impostorscore=0 bulkscore=0 clxscore=1015 spamscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 adultscore=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