Re: [PATCH v4 1/4] drivers: usb: phy: add a new driver for usb part of control module

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[...]

> > > +OMAP CONTROL USB
> > > +
> > > +Required properties:
> > > + - compatible: Should be "ti,omap-control-usb"
> > > + - reg : Address and length of the register set for the device. It contains
> > > +   the address of "control_dev_conf" and "otghs_control" or "phy_power_usb"
> > 
> > Could you not use '-' over '_' here?
> 
> that's part of omap hwmod.

Aha, that makes sense (unlike my original comment, now I reread it). Sorry for
the noise.

> > > +   depending upon omap4 or omap5.
> > > + - reg-names: The names of the register addresses corresponding to the registers
> > > +   filled in "reg".
> > > + - ti,type: This is used to differentiate whether the control module has
> > > +   usb mailbox or usb3 phy power. omap4 has usb mailbox in control module to
> > > +   notify events to the musb core and omap5 has usb3 phy power register to
> > > +   power on usb3 phy. Should be "1" if it has mailbox and "2" if it has usb3
> > > +   phy power.
> > 
> > Why not make this a string property, perhaps values "mailbox" or "register"?
> 
> NAK.

Can I ask what your objection to using a string property is?

As far as I can see, "ti,type" is only used by this driver, so there's no
common convention to stick to. Using a string makes the binding easier for
humans to read, and thus harder to mess up in a dts, and it decouples the
binding from kernel-side constants.

Thanks,
Mark.

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