[EXT] Re: [PATCH v2 1/3] dt-bindings: usb: cdns-imx8qm: add imx8qm cdns3 glue bindings

Frank Li frank.li at nxp.com
Mon Mar 20 12:59:36 PDT 2023


> 
> The second is a good example - as you can see, there is a choice of
> values, so they are not exactly fixed.
> 
> >
> > Such frequency information is necessary.  We can put to dts or clock drivers.
> The clock driver
> 
> If this is the argument, then the answer is NAK. Sorry, but DTS is not
> for offloading fixed stuff just because you do not want to work on
> drivers. The same for discoverable stuff.
> 
> > Become bigger, or dts become bigger.  I think the key point is if property to
> descript hardware information.
> 
> You have to understand that with your binding you are not allowing to
> any changes of these frequencies.

Do you means it should be okay if one of  clocks is not fixed?

Previous owner already left nxp.  I double checked our documents and scfw source code. 
I miss understood a clock SC_PM_CLK_MST_BUS, which actually mapped to IP's aclk, which
ware 100Mhz to 600Mhz. 

> 
> Best regards,
> Krzysztof




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