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    SubjectRe: [PATCH v3 14/19] dt-bindings: hwmon: (mr75203) add "moortec, ts-series" property
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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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