Messages in this thread | | | Subject | Re: [PATCH v3 14/19] dt-bindings: hwmon: (mr75203) add "moortec, ts-series" property | Date | Fri, 2 Sep 2022 16:18:02 +0300 | From | "Farber, Eliav" <> |
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On 8/31/2022 12:42 PM, Philipp Zabel wrote: > On Mi, 2022-08-31 at 12:23 +0300, Farber, Eliav wrote: >> 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. > > Thank you for the explanation, I think this information would be nice > to have in a description in moortec,mr75203.yaml.
For v4 I added a new patch which adds this description in moortec,mr75203.yaml:
description: | A Moortec PVT (Process, Voltage, Temperature) monitoring logic design can include many different units. Such a design will usually consists of several Moortec's embedded analog IPs, and a single Moortec controller to configure and control the IPs.
Some of the Moortec's analog hard IPs that can be used in a design: *) Temperature Sensor (TS) - used to monitor core temperature (e.g. mr74137). *) Voltage Monitor (VM) - used to monitor voltage levels (e.g. mr74138). *) Process Detector (PD) - used to assess silicon speed (e.g. mr74139). *) Delay Chain - ring oscillator connected to the PD, used to measure IO based transistors (e.g. mr76008 ring oscillator at 1.1V, mr76007 ring oscillator at 1.8V). *) Pre Scaler - provides divide-by-X scaling of input voltage, which can then be presented for VM for measurement within its range (e.g. mr76006 - divide by 2 pre-scaler).
TS, VM & PD also include a digital interface, which consists of configuration inputs and measurement outputs. The mr75203 binding describes configuration for the controller unit, but also for some of the analog IPs.
-- Regards, Eliav
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