[PATCH v2 0/3] Lenovo ThinkPad T14s EC thermal monitoring and thermal zone integration

[Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>]

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