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Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] > > From: HaoNing Cheng > > 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. why board difference cause such offset, I suppose it is cause by SoC variance. The offset may difference if you change to another chip. another words, if you have 1000 boards, Is this offset the same? > 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 > --- > Documentation/devicetree/bindings/thermal/imx-thermal.yaml | 8 ++++++++ > 1 file changed, 8 insertions(+) > > diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml > index 949b154856c5..eb7243a7ebaf 100644 > --- a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml > +++ b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml > @@ -59,6 +59,13 @@ properties: > clocks: > maxItems: 1 > > + fsl,temp-calibration-offset-millicelsius: > + maxItems: 1 suppose it int32, why need maxItems here? Frank > + 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. > + > "#thermal-sensor-cells": > const: 0 > > @@ -109,6 +116,7 @@ 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>; > }; > }; > > -- > 2.43.0 > > >