Re: Unsupported device message, Compliance C.2, part 4

Felipe Balbi wrote:
> Hi all,
> 
> On 10/10/07, Aras Vaichas <[email protected]> wrote:
>> Alan Stern wrote:
>>> On Tue, 9 Oct 2007, Aras Vaichas wrote:
>>>
>>>> I just discovered that not all devices create a "product" file when inserted,
>>>> so I've changed the script to look for a symbolic link to the device driver.
>>>> AFAIK, an unknown device will not have this link (please correct me if I am wrong).
> 
> This discussion looks kinda useless to me.
> No silent error requirement is just for OTG devices.

Sorry, but it applies to both Embedded Host and OTG.

See "EH Compliance Plan v1.0"
http://www.usb.org/developers/docs/EH_Compliance_v1_0.pdf, section A.3

"13. The USB On-The-Go Supplement introduces the concept of the "No Silent 
Failures".[OTG:3:4] The concept of "No Silent Failures" shall apply to any host 
regardless of whether it is OTG or embedded."


> I actually have some patches from me and other contributors
> implementing such messaging support through sysfs.
> 
> And it looks really good.
> 
> Such patch series also initialize otg targeted peripheral list (aka
> whitelist) through board*.c files and implement some sort of dynamic
> OTG TPL.
> 
> It's  not sent yet cuz there's also some implementation regarding vbus
> error messaging that is done only for musb driver which is only in
> linux-omap tree yet.
> 
> Maybe in a couple of weeks I'll have everything done and I'll be able
> to share such work.

Is it just for OTG? will it work the same for embedded host?

Aras

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