linux-kernel - Re: [PATCH V2] USB: initialize or shutdown PHY when add or remove host controller

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Message-ID: <20130619024839.GA1987@kroah.com>
Date:	Tue, 18 Jun 2013 19:48:39 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Chao Xie <chao.xie@...vell.com>
Cc:	stern@...land.harvard.edu, balbi@...com, rogerq@...com,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, xiechao.mail@...il.com
Subject: Re: [PATCH V2] USB: initialize or shutdown PHY when add or remove
 host controller

On Tue, Jun 18, 2013 at 10:31:20PM -0400, Chao Xie wrote:
> Some controller need software to initialize PHY before add
> host controller, and shut down PHY after remove host controller.
> Add the generic code for these controllers so they do not need
> do it in its own host controller driver.

Why?  What breaks if we add this patch, and what gets fixed?  I'm
guessing you can then remove code?

What out-of-tree code now works properly?  Or gets broken?

we need more info here please...

thanks,

greg k-h
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