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List:       linux-usb
Subject:    Re: [PATCH v3 1/3] USB: chipidea: add imx usbmisc support
From:       Richard Zhao <richard.zhao () freescale ! com>
Date:       2012-07-31 9:06:33
Message-ID: 20120731090632.GK3347 () b20223-02 ! ap ! freescale ! net
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On Tue, Jul 31, 2012 at 09:06:33AM +0800, Chen Peter-B29397 wrote:
>  
> > >
> > > <&usbmisc 0> would then mean port 0 of the usbmisc device.
> > I didn't add the restriction that a usbmisc driver must have a usbmisc
> > device. I'm not sure whether all SoC and future SoC can be look as
> > a device.
> > 
> > Peter, do you have any idea?
> > 
> I have not followed this usbmisc design, I just list some facts at i.mx
> USB controller:
> 
> Sigmatel-derived SoCs (i.mx23, i.mx28) have no this register region, all phy controls
> are through PHY register.
> Other freescale SoCs have this usbmisc register region to control phy and tune some
> signal quality. This register region is from another 0x800 or (last controller base address + 0x200) 
Looks good. I'll take Sascha's suggestion.

Thanks
Richard
> 
> > Thanks
> > Richard
> > >
> > > If the usbmisc property exists, you can return -EPROBE_DEFER until it
> > is
> > > available. If it doesn't exist, you just continue without usbmisc
> > > support (i.MX28)
> > >
> > > Sascha
> > >
> > >
> > > --
> > > Pengutronix e.K.                           |
> > |
> > > Industrial Linux Solutions                 | http://www.pengutronix.de/
> > |
> > > Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0
> > |
> > > Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-
> > 5555 |
> > >

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