[PATCH v3 1/2] dt-bindings: thermal: imx: Document calibration offset property
From: HaoNing Cheng via B4 Relay <devnull+Haoning.CHENG.cn.bosch.com@kernel.org>
Date: 2026-07-10 02:50:59
Also in:
b4-sent, imx, linux-devicetree, linux-pm, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest, thermal · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Rafael J. Wysocki, Daniel Lezcano
From: HaoNing Cheng <redacted> Some boards need a small per-design correction to align the reported CPU temperature with board-level measurements. Document the optional fsl,temp-calibration-offset-millicelsius property, a signed offset in millicelsius that is added to the calculated sensor temperature. The property is optional and the existing behaviour is kept when it is omitted. Update the binding example to show its usage. Signed-off-by: HaoNing Cheng <redacted> --- Documentation/devicetree/bindings/thermal/imx-thermal.yaml | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml
index 949b154856c5..704bf2fa48cf 100644
--- a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml@@ -59,6 +59,15 @@ properties: clocks: maxItems: 1 + fsl,temp-calibration-offset-millicelsius: + maxItems: 1 + description: + A signed calibration offset, in millicelsius, added to the calculated + sensor temperature to compensate for board-level measurement + differences. When absent, no offset is applied. + minimum: -28580 + maximum: 28580 + "#thermal-sensor-cells": const: 0
@@ -109,6 +118,7 @@ examples: nvmem-cells = <&tempmon_calib>, <&tempmon_temp_grade>; nvmem-cell-names = "calib", "temp_grade"; clocks = <&clks IMX6SX_CLK_PLL3_USB_OTG>; + fsl,temp-calibration-offset-millicelsius = <(-6400)>; #thermal-sensor-cells = <0>; }; };
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2.43.0