Re: [PATCH v2 1/2] dt-bindings: clock: Add nvmem-clock

[Krzysztof Kozlowski]

Resending as my previous email probably got lost. If you got it twice,
apologies.


On 26/05/2023 16:38, Mike Looijmans wrote:
> Add bindings for a fixed-rate clock that retrieves its rate from an
> NVMEM provider. This allows to store clock settings in EEPROM or EFUSE
> or similar device.
> 
> Component shortages lead to boards being shipped with different clock
> crystals, based on what was available at the time. The clock frequency
> was written to EEPROM at production time. Systems can adapt to a wide
> range of input frequencies using the clock framework, but this required
> us to patch the devicetree at runtime or use some custom driver. This
> provides a more generic solution.

This does not look like real hardware. I mean, the clock does not fetch
its rate from nvmem, right? It's the Linux which does it, so basically
you described here driver, not hardware.

Extend existing fixed-clock bindings to allow reading frequency via
nvmem cells.



Best regards,
Krzysztof