linux-kernel - Re: omap5: dwc3 interface status in /sys

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Message-ID: <dc99d686-9b77-dabf-2d0d-81083e4f98ec@ti.com>
Date:   Thu, 18 Oct 2018 13:57:30 +0300
From:   Roger Quadros <rogerq@...com>
To:     Felipe Balbi <balbi@...nel.org>
CC:     <hns@...delico.com>,
        Kernel development list <linux-kernel@...r.kernel.org>,
        Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
        <kernel@...a-handheld.com>, <letux-kernel@...nphoenux.org>
Subject: Re: omap5: dwc3 interface status in /sys

On 18/10/2018 13:50, Felipe Balbi wrote:
> Hi,
> 
> On Tue, Oct 16, 2018 at 1:27 PM Roger Quadros <rogerq@...com> wrote:
>>
>> Felipe,
>>
>> On 16/10/2018 12:29, H. Nikolaus Schaller wrote:
>>> Hi,
>>>
>>>> Am 17.09.2018 um 10:24 schrieb H. Nikolaus Schaller <hns@...delico.com>:
>>>>
>>>> Hi Felipe,
>>>> I have made otg mode work on the omap5-uevm with help from Roger
>>>> and now I wonder how to read the interface status for GUI display.
>>>>
>>>> On omap3/twl4030 systems we can simply read
>>>>
>>>>      /sys/bus/platform/devices/musb-hdrc.0.auto/mode
>>>>
>>>> and get reports e.g. "b_peripheral", "a_host", "b_idle" etc. which can easily
>>>> be translated into icons for GUI display.
>>>>
>>>> We have not found a similar attribute for dwc3 (except part of this information
>>>> in
>>>>
>>>>      /sys/kernel/debug/4a030000.dwc3
>>>>
>>>> but mounting debugfs for GUI purposes isn't a good idea).
>>>>
>>>> So do you think it is possible to provide such information to
>>>>
>>>>      /sys/devices/platform/44000000.ocp/4a020000.omap_dwc3/4a030000.dwc3?
>>>
>>> any suggestions?
>>
>> This question is not specific to omap5.
>> What is your opinion? If you think it is OK, I can provide a patch for it.
> 
> sounds like this should be part of DRD/OTG core, no?

Yes Felipe.

-- 
cheers,
-roger

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