[PATCH v1 0/3] Lenovo ThinkPad T14s EC thermal monitoring and thermal zone integration

[Daniel Lezcano]

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, as well as fan speed information. 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 and fan
RPM reporting.

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.

With the latest patch, this series fixes thermal issues happening on
this platform where a kernel compilation leads to a system reboot.

Tested on a Lenovo ThinkPad T14s Gen 6 (Snapdragon X Elite).

Thanks,

Daniel

Daniel Lezcano (3):
  drivers/platform: lenovo-t14s-ec: Add hwmon support for temperatures
    and fan speed
  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 | 193 +++++++++++++++++-
 2 files changed, 255 insertions(+), 6 deletions(-)

-- 
2.53.0