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

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Message-ID: <CAH8TKc-0wDXg4VaOho3_uat3JGQSGa=dQyMu7fJEwi6Tce2Z3g@mail.gmail.com>
Date:   Thu, 18 Oct 2018 13:50:51 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Roger Quadros <rogerq@...com>
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

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?

cheers