Messages in this thread | | | Subject | Re: [PATCH v3 14/19] dt-bindings: hwmon: (mr75203) add "moortec, ts-series" property | Date | Wed, 31 Aug 2022 12:23:44 +0300 | From | "Farber, Eliav" <> |
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On 8/31/2022 11:23 AM, Philipp Zabel wrote: > On Di, 2022-08-30 at 19:22 +0000, Eliav Farber wrote: >> Add optional "moortec,ts-series" property to define the temperature >> equation and coefficients that shall be used to convert the digital >> output to value in milli-Celsius. >> Supported series: 5 (default) and 6. > > Is this the difference between mr75xxx and mr76xxx series? > If so, should be a compatible "moortec,mr76006" instead? > If the temperature equation could be derived from the compatible, this > property would not be necessary. The PVT (Process, Voltage, Temperature) monitoring logic can be constructed from many different sub-blocks: *) CONTROLLER (mr75203) - controlling TS, PD and VM. *) TS (mr74137) - for measuring temperature in ring. *) PD (mr74139) - for measuring IO based transistors. *) VM (mr74138) - for measuring voltage rails across the SoC. *) Ring oscillators (mr76007/mr76008) *) Pre-scalers (mr76006)
Besides mr75203 which is digital all other IPs are analog. There is a single mr75203 and there can be several or none of the other units.
The kernel driver is only for the controller (mr75203). The series 5 or 6 is relevant for the TS (mr74137) and not for the controller (mr75203). Each of the analog units can have a different series number (for example we use series 3 of the VM).
That is why I didn't change the compatible of mr75203, and instead added a TS-series parameter.
-- Regards, Eliav
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