Re: Non-enumerable devices on USB and other enumerable buses

From: Mark Brown
Date: Wed Aug 14 2013 - 14:49:34 EST

On Wed, Aug 14, 2013 at 10:30:44AM -0600, Stephen Warren wrote:
> On 08/14/2013 10:14 AM, Alan Stern wrote:

> > No, no -- this is exactly the point I was trying to make. The on-board
> > hub _won't_ appear on the USB bus until the GPIOs are set. Therefore
> > the callback to set the GPIOs needs to be at a different place, not
> > when the device appears.

> The device Mark was talking about is the controller end of the bus (EHCI
> controller, or hub's downstream port) not the device end of the bus (any
> USB device's upstream port).

Actually it genuinely is a hub - it's not part of the controller, though
the startup does need to be synchronised with the controller. It ends
up parenting some other devices but that's not suchan issue.

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