usb: dwc3: Support option to disable USB2 LPM

Hi,

Quoted 5 lines · Roger Quadros

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Also can we have some consistency in usage of '-' vs '_'?

Right.. I agree. I've been using '-' as it is the preferred syntax as most of the properties, but some old properties use '_'. Do you have any suggestion?

Quoted 3 lines

I'd keep it consistent to "snps,usb3_lpm_capable" so we avoid mistakes when writing the DT.
Felipe?

_ are not really accepted in DT, except for legacy properties. What we can do is rename usb3_lpm_capable to usb3-lpm-capable and change code to try with _ if - fails. Then we can introduce the new property using -