[PATCH v2 0/2] thermal: imx: Add calibration offset support

[HaoNing Cheng via B4 Relay]

Some i.MX boards need a small per-design correction to align the
reported CPU temperature with board-level measurements. This series
adds an optional DT property to specify such a calibration offset
and implements the corresponding support in the imx_thermal driver.

Patch 1 documents the new fsl,temp-calibration-offset-millicelsius
property in the i.MX thermal DT binding.

Patch 2 reads this property in the imx_thermal driver and applies
the offset to the i.MX6/6SX/7D calibration formulas. When the
property is absent, the default offset remains 0, preserving the
current behaviour.

Signed-off-by: Haoning CHENG <Haoning.CHENG@xxxxxxxxxxxx>
---
Changes in v2:
- dt-bindings: Removed explicit `$ref: /schemas/types.yaml#/definitions/int32`
  for fsl,temp-calibration-offset-millicelsius; the `-millicelsius` suffix
  already resolves to int32-array via property-units.yaml (Rob).
- dt-bindings: Fixed example indentation.
- driver: Replaced C integer division (/) with DIV_ROUND_CLOSEST() in
  imx_set_alarm_temp() to prevent off-by-one alarm threshold mismatch that
  could cause IRQ storms on i.MX7D.
- driver: Added clamp() bounds check for alarm_value [0, 0x1ff] to avoid
  corrupting adjacent register fields (PANIC_ALARM).
- Link to v1: https://patch.msgid.link/20260709-b4-symana21-11221-imx-thermal-support-upstream-6-18-v1-0-00f88f42930b@xxxxxxxxxxxx

To: "Rafael J. Wysocki" <rafael@xxxxxxxxxx>
To: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
To: Zhang Rui <rui.zhang@xxxxxxxxx>
To: Lukasz Luba <lukasz.luba@xxxxxxx>
To: Rob Herring <robh@xxxxxxxxxx>
To: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
To: Conor Dooley <conor+dt@xxxxxxxxxx>
To: Shawn Guo <shawnguo@xxxxxxxxxx>
To: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
To: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
To: Fabio Estevam <festevam@xxxxxxxxx>
Cc: linux-pm@xxxxxxxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: imx@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx

---
HaoNing Cheng (2):
      dt-bindings: thermal: imx: Document calibration offset property
      thermal/drivers/imx: Add calibration offset support

 .../devicetree/bindings/thermal/imx-thermal.yaml       |  8 ++++++++
 drivers/thermal/imx_thermal.c                          | 18 +++++++++++++-----
 2 files changed, 21 insertions(+), 5 deletions(-)
---
base-commit: c50a940dcde35c647e097e89a9150003abd48329
change-id: 20260709-b4-symana21-11221-imx-thermal-support-upstream-6-18-a084984deb76

Best regards,
--  
Haoning CHENG <Haoning.CHENG@xxxxxxxxxxxx>