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Mon, 06 Jul 2026 09:08:37 -0700 (PDT) Received: from juillet.box.freepro.com ([2a05:6e02:1041:c10:8405:4a9c:95fc:4b8f]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-47a9e3e2702sm26071966f8f.9.2026.07.06.09.08.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jul 2026 09:08:36 -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, neil.armstrong@linaro.org, gaurav.kohli@oss.qualcomm.com, manaf.pallikunhi@oss.qualcomm.com, priyansh.jain@oss.qualcomm.com Subject: [PATCH v4 0/2] Lenovo ThinkPad T14s EC thermal monitoring and thermal zone integration Date: Mon, 6 Jul 2026 18:08:27 +0200 Message-ID: <20260706160830.17698-1-daniel.lezcano@oss.qualcomm.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: platform-driver-x86@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: WSGLhpa9ia08fL9SWDDCWHl15j3vuG8l X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzA2MDE2NCBTYWx0ZWRfX2xb24ERTNCIo d4LAooUcXHGNKdvhjCAF3oEjsZusJSoImz9vIVUNtQH0INCXu3WGoHyd1rjglK3mKEkMcmd4KaT C3WLxcfwep846dc44/it8HpOdGzz2Kcp8VdumlI5P6waQsbXI5+vid0xL7oTDF255/SZDp/o75G RMt3utWS3RpCAkEVTOFyNpSC0YnxJifaa3UElSGyKoQqKxOAXAQhDWeUchjHx1KVI55XpL4FpwM 0OgZJSOFDyNtt739Pu84LUEPVk41gpZKgPErby5naLj76ggAkj1qg1r9lFN8e/yULHj+reFTc89 6HArGOCkUkXmEvtCF7g6B0gbcMzSWWmKU31LJvDxmvViX0yyWShqpYePTZEzCAi5Ya1jn1W6aHN UKgAWTS0V+cl+ZBJafXT2lWXxLDot0km07pYdLIQzobcdkfRRJhxa9fQqI9kZtEOQ0EO7DuJnea hrsSjDXFMWGzvHgT0IA== X-Proofpoint-Spam-Info: AW1haW4tMjYwNzA2MDE2NCBTYWx0ZWRfX1U36IGTIJ/an +cUltfhxgx9waQqwT1onI6P+Zt0CouSud8fopXTnhuI+rQXZYeP3fDqtSHtZF1NSYHudhLse0s4 Cz62lrX0hTknpOyFcEM2ZzYjKZkzvaI= X-Authority-Analysis: v=2.4 cv=XIwAjwhE c=1 sm=1 tr=0 ts=6a4bd307 cx=c_pps a=JIY1xp/sjQ9K5JH4t62bdg==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=Jz99LMs1rTwwAPREzXgA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=tNoRWFLymzeba-QzToBc:22 X-Proofpoint-GUID: WSGLhpa9ia08fL9SWDDCWHl15j3vuG8l X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-06_02,2026-07-06_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 clxscore=1015 bulkscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 spamscore=0 phishscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607060164 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 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. As the EC protocol is not fully decoded, the passive trip points get/set actions are missing, so it is not possible to program a threshold and receive an interrupt when crossed the way up or down. Consequently, the thermal zone related to the charging circuitry is polled every two seconds until we can set the trip points in the EC. 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). Please make sure scmi-cpufreq.ko is loaded before testing Thanks, Daniel --- Changelog: v4: - Added the missing HWMON_C_REGISTER_TZ attribute (Sashiko) - Fixed dependency with HWMON (Sashiko) - Added tags v3: - Removed event based because trip point are not yet well supported - Added an empty line after variable declaration (Ilpo Järvinen) - Used MILLIDEGREE_PER_DEGREE from units.h (Ilpo Järvinen) - Made switch consistent (Ilpo Järvinen) 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 (2): platform: arm64: lenovo-thinkpad-t14s-ec: Add hwmon support for temperatures arm64: dts: qcom: x1e78100-t14s: Add thermal zones for keyboard skin and charging sensors .../qcom/x1e78100-lenovo-thinkpad-t14s.dtsi | 67 ++++++++- drivers/platform/arm64/Kconfig | 1 + drivers/platform/arm64/lenovo-thinkpad-t14s.c | 131 ++++++++++++++++++ 3 files changed, 198 insertions(+), 1 deletion(-) -- 2.53.0