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

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Date:   Tue, 16 Oct 2018 11:29:53 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Felipe Balbi <balbi@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Roger Quadros <rogerq@...com>, kernel@...a-handheld.com,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>
Subject: Re: omap5: dwc3 interface status in /sys

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?

BR and thanks,
Nikolaus