linux-kernel - Re: [PATCH v4 3/7] phy: Add set

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Date:	Wed, 4 May 2016 14:48:21 -0500
From:	David Lechner <david@...hnology.com>
To:	Bin Liu <b-liu@...com>, petr@...ix.com,
	sergei.shtylyov@...entembedded.com, khilman@...nel.org,
	nsekhar@...com, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Kishon Vijay Abraham I <kishon@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Lee Jones <lee.jones@...aro.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org
Subject: Re: [PATCH v4 3/7] phy: Add set_mode callback

On 05/04/2016 01:39 PM, Bin Liu wrote:
>
> Have you already tested this? I never tried changing mode via sysfs, but
> by quickly reviewing the code, I am wondering how it works. the core
> only calls ops->set_mode() but nothing else. To really switch the mode,
> the driver has to talk to the root hub, and manipulate the SESSION
> bit...
>
> Regards,
> -Bin.
>


I haven't actually tried this. I need to hack together a USB cable to 
test it in host mode (Mini-B to Mini-B w/ powered hub).