linux-kernel - Re: [PATCH 2/2] ARM: dts: omap5: Add dr

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <540D9449.3090008@compulab.co.il>
Date:	Mon, 08 Sep 2014 14:34:33 +0300
From:	Dmitry Lifshitz <lifshitz@...pulab.co.il>
To:	Felipe Balbi <balbi@...com>, Roger Quadros <rogerq@...com>
CC:	Kishon Vijay Abraham I <kishon@...com>, bcousson@...libre.com,
	tony@...mide.com, rob.herring@...xeda.com, pawel.moll@....com,
	mark.rutland@....com, swarren@...dotorg.org,
	ijc+devicetree@...lion.org.uk, linux@....linux.org.uk,
	linux-omap@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	George Cherian <george.cherian@...com>
Subject: Re: [PATCH 2/2] ARM: dts: omap5: Add dr_mode for dwc3

Hi Felipe, Roger

On 04/16/2014 07:16 PM, Felipe Balbi wrote:
> On Fri, Oct 11, 2013 at 05:46:12PM +0300, Roger Quadros wrote:
>> Hi,
>>
>> On 10/10/2013 01:49 PM, Kishon Vijay Abraham I wrote:
>>> From: George Cherian <george.cherian@...com>
>>>
>>> Added dr_mode property in dwc3 and set its default mode to device.
>>
>> If there is a specific reason why this is not set to "otg", we need
>> to explain it here.
>>
>> AFAIK the port is meant to be used as OTG port.
>
> we still don't have the workaround for dual role ports, I've been
> working on it but still need to retest and make sure it's working fine
> before merging upstream.
>


Does the OTG port suppose to work with OMAP5? I mean role switching 
mechanism?

I'm testing kernel v3.16 with OMAP5 based board (CM-T54).

If I set CONFIG_USB_DWC3_DUAL_ROLE, than nothing is going on when I plug 
some device/host cable into micro USB3.0 port (VBUS/ID detection with 
extcon events works fine).

CONFIG_USB_DWC3_HOST/CONFIG_USB_DWC3_GADGET bring port to appropriate 
mode and it works.

What is the purpose of setting dr_mode = "peripheral" in omap5.dtsi, 
since it is overridden by config options in dwc3_probe()?

Thank you in advance for the assistance,

Dmitry

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/